Foliage and fruit susceptibility of a pecan provenance collection to scab, caused by Venturia effusa

Background Pecan (Carya illinoinensis) is an important native nut crop in the southern USA. In the Southeast, scab (caused by Venturia effusa) is a major constraint to production, and can result in significant yield losses. The breadth of sources of resistance are poorly defined, and the genetics of resistance has not been established. The aim of this study was to assess the severity of pecan scab on foliage and fruit of the trees in a collection at Georgia, USA, of 875 native pecan genotypes from 93 families in 19 provenances in various states in the USA and Mexico. Methods The scab responses on foliage and fruit on each pecan tree was visually assessed in 2018 and 2019. Both a most severe measure (most severely infected leaf or fruit), and an overall tree rating was taken. Scab severity data were analyzed using a mixed linear model with means separation to explore provenance and family within provenance scab susceptibilities. Results Significant differences in scab susceptibility between provenances and among families within provenances were detected. Trees from provenances in Illinois, Kansas, Kentucky, Missouri, Mississippi, Tennessee and Texas, USA, showed the greatest resistance (based on mean scab severity) for both foliar and fruit scab. Assessments of scab on foliage and fruit gave similar results, as did the values for the most severe scab in the tree and the overall scab severity score. Of the 875 trees assessed, 201 trees had no detectable scab symptoms on foliage or fruit in either year. An additional 116 trees were free of scab symptoms on foliage but did not produce fruit in either year. Those provenances, families within provenances and trees with greatest resistance to scab most often originated from provenance locations with higher rainfall and consequently would be under selection to adapt to scab. Conclusions Identifying populations with most diverse resistance, and those most consistently resistant trees can serve as a resource to develop a better understanding of the scab resistance mechanisms. These natural sources of scab resistance coupled with molecular and genomics tools will contribute to the accelerated development of new pecan cultivars with durable resistance to scab. Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Bock, Clive H. [verfasserIn] Alarcon, Yanina [verfasserIn] Conner, Patrick J. [verfasserIn] Young, Carolyn A. [verfasserIn] Randall, Jennifer J. [verfasserIn] Pisani, Cristina [verfasserIn] Grauke, Larry J. [verfasserIn] Wang, Xinwang [verfasserIn] Monteros, Maria J. [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2020

Schlagwörter:	Disease severity Disease assessment Disease control Host resistance Plant breeding

Übergeordnetes Werk:	Enthalten in: CABI agriculture and bioscience - [Wallingford] : CABI, 2020, 1(2020), 1 vom: 23. Nov.
Übergeordnetes Werk:	volume:1 ; year:2020 ; number:1 ; day:23 ; month:11

Links:	Volltext

DOI / URN:	10.1186/s43170-020-00020-9

Katalog-ID:	SPR042121175

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520			\|a Background Pecan (Carya illinoinensis) is an important native nut crop in the southern USA. In the Southeast, scab (caused by Venturia effusa) is a major constraint to production, and can result in significant yield losses. The breadth of sources of resistance are poorly defined, and the genetics of resistance has not been established. The aim of this study was to assess the severity of pecan scab on foliage and fruit of the trees in a collection at Georgia, USA, of 875 native pecan genotypes from 93 families in 19 provenances in various states in the USA and Mexico. Methods The scab responses on foliage and fruit on each pecan tree was visually assessed in 2018 and 2019. Both a most severe measure (most severely infected leaf or fruit), and an overall tree rating was taken. Scab severity data were analyzed using a mixed linear model with means separation to explore provenance and family within provenance scab susceptibilities. Results Significant differences in scab susceptibility between provenances and among families within provenances were detected. Trees from provenances in Illinois, Kansas, Kentucky, Missouri, Mississippi, Tennessee and Texas, USA, showed the greatest resistance (based on mean scab severity) for both foliar and fruit scab. Assessments of scab on foliage and fruit gave similar results, as did the values for the most severe scab in the tree and the overall scab severity score. Of the 875 trees assessed, 201 trees had no detectable scab symptoms on foliage or fruit in either year. An additional 116 trees were free of scab symptoms on foliage but did not produce fruit in either year. Those provenances, families within provenances and trees with greatest resistance to scab most often originated from provenance locations with higher rainfall and consequently would be under selection to adapt to scab. Conclusions Identifying populations with most diverse resistance, and those most consistently resistant trees can serve as a resource to develop a better understanding of the scab resistance mechanisms. These natural sources of scab resistance coupled with molecular and genomics tools will contribute to the accelerated development of new pecan cultivars with durable resistance to scab.
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allfields	10.1186/s43170-020-00020-9 doi (DE-627)SPR042121175 (SPR)s43170-020-00020-9-e DE-627 ger DE-627 rakwb eng 630 ASE Bock, Clive H. verfasserin aut Foliage and fruit susceptibility of a pecan provenance collection to scab, caused by Venturia effusa 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Background Pecan (Carya illinoinensis) is an important native nut crop in the southern USA. In the Southeast, scab (caused by Venturia effusa) is a major constraint to production, and can result in significant yield losses. The breadth of sources of resistance are poorly defined, and the genetics of resistance has not been established. The aim of this study was to assess the severity of pecan scab on foliage and fruit of the trees in a collection at Georgia, USA, of 875 native pecan genotypes from 93 families in 19 provenances in various states in the USA and Mexico. Methods The scab responses on foliage and fruit on each pecan tree was visually assessed in 2018 and 2019. Both a most severe measure (most severely infected leaf or fruit), and an overall tree rating was taken. Scab severity data were analyzed using a mixed linear model with means separation to explore provenance and family within provenance scab susceptibilities. Results Significant differences in scab susceptibility between provenances and among families within provenances were detected. Trees from provenances in Illinois, Kansas, Kentucky, Missouri, Mississippi, Tennessee and Texas, USA, showed the greatest resistance (based on mean scab severity) for both foliar and fruit scab. Assessments of scab on foliage and fruit gave similar results, as did the values for the most severe scab in the tree and the overall scab severity score. Of the 875 trees assessed, 201 trees had no detectable scab symptoms on foliage or fruit in either year. An additional 116 trees were free of scab symptoms on foliage but did not produce fruit in either year. Those provenances, families within provenances and trees with greatest resistance to scab most often originated from provenance locations with higher rainfall and consequently would be under selection to adapt to scab. Conclusions Identifying populations with most diverse resistance, and those most consistently resistant trees can serve as a resource to develop a better understanding of the scab resistance mechanisms. These natural sources of scab resistance coupled with molecular and genomics tools will contribute to the accelerated development of new pecan cultivars with durable resistance to scab. Disease severity (dpeaa)DE-He213 Disease assessment (dpeaa)DE-He213 Disease control (dpeaa)DE-He213 Host resistance (dpeaa)DE-He213 Plant breeding (dpeaa)DE-He213 Alarcon, Yanina verfasserin aut Conner, Patrick J. verfasserin aut Young, Carolyn A. verfasserin aut Randall, Jennifer J. verfasserin aut Pisani, Cristina verfasserin aut Grauke, Larry J. verfasserin aut Wang, Xinwang verfasserin aut Monteros, Maria J. verfasserin aut Enthalten in CABI agriculture and bioscience [Wallingford] : CABI, 2020 1(2020), 1 vom: 23. Nov. (DE-627)1702017982 (DE-600)3028099-0 2662-4044 nnns volume:1 year:2020 number:1 day:23 month:11 https://dx.doi.org/10.1186/s43170-020-00020-9 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4367 GBV_ILN_4700 AR 1 2020 1 23 11
spelling	10.1186/s43170-020-00020-9 doi (DE-627)SPR042121175 (SPR)s43170-020-00020-9-e DE-627 ger DE-627 rakwb eng 630 ASE Bock, Clive H. verfasserin aut Foliage and fruit susceptibility of a pecan provenance collection to scab, caused by Venturia effusa 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Background Pecan (Carya illinoinensis) is an important native nut crop in the southern USA. In the Southeast, scab (caused by Venturia effusa) is a major constraint to production, and can result in significant yield losses. The breadth of sources of resistance are poorly defined, and the genetics of resistance has not been established. The aim of this study was to assess the severity of pecan scab on foliage and fruit of the trees in a collection at Georgia, USA, of 875 native pecan genotypes from 93 families in 19 provenances in various states in the USA and Mexico. Methods The scab responses on foliage and fruit on each pecan tree was visually assessed in 2018 and 2019. Both a most severe measure (most severely infected leaf or fruit), and an overall tree rating was taken. Scab severity data were analyzed using a mixed linear model with means separation to explore provenance and family within provenance scab susceptibilities. Results Significant differences in scab susceptibility between provenances and among families within provenances were detected. Trees from provenances in Illinois, Kansas, Kentucky, Missouri, Mississippi, Tennessee and Texas, USA, showed the greatest resistance (based on mean scab severity) for both foliar and fruit scab. Assessments of scab on foliage and fruit gave similar results, as did the values for the most severe scab in the tree and the overall scab severity score. Of the 875 trees assessed, 201 trees had no detectable scab symptoms on foliage or fruit in either year. An additional 116 trees were free of scab symptoms on foliage but did not produce fruit in either year. Those provenances, families within provenances and trees with greatest resistance to scab most often originated from provenance locations with higher rainfall and consequently would be under selection to adapt to scab. Conclusions Identifying populations with most diverse resistance, and those most consistently resistant trees can serve as a resource to develop a better understanding of the scab resistance mechanisms. These natural sources of scab resistance coupled with molecular and genomics tools will contribute to the accelerated development of new pecan cultivars with durable resistance to scab. Disease severity (dpeaa)DE-He213 Disease assessment (dpeaa)DE-He213 Disease control (dpeaa)DE-He213 Host resistance (dpeaa)DE-He213 Plant breeding (dpeaa)DE-He213 Alarcon, Yanina verfasserin aut Conner, Patrick J. verfasserin aut Young, Carolyn A. verfasserin aut Randall, Jennifer J. verfasserin aut Pisani, Cristina verfasserin aut Grauke, Larry J. verfasserin aut Wang, Xinwang verfasserin aut Monteros, Maria J. verfasserin aut Enthalten in CABI agriculture and bioscience [Wallingford] : CABI, 2020 1(2020), 1 vom: 23. Nov. (DE-627)1702017982 (DE-600)3028099-0 2662-4044 nnns volume:1 year:2020 number:1 day:23 month:11 https://dx.doi.org/10.1186/s43170-020-00020-9 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4367 GBV_ILN_4700 AR 1 2020 1 23 11
allfields_unstemmed	10.1186/s43170-020-00020-9 doi (DE-627)SPR042121175 (SPR)s43170-020-00020-9-e DE-627 ger DE-627 rakwb eng 630 ASE Bock, Clive H. verfasserin aut Foliage and fruit susceptibility of a pecan provenance collection to scab, caused by Venturia effusa 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Background Pecan (Carya illinoinensis) is an important native nut crop in the southern USA. In the Southeast, scab (caused by Venturia effusa) is a major constraint to production, and can result in significant yield losses. The breadth of sources of resistance are poorly defined, and the genetics of resistance has not been established. The aim of this study was to assess the severity of pecan scab on foliage and fruit of the trees in a collection at Georgia, USA, of 875 native pecan genotypes from 93 families in 19 provenances in various states in the USA and Mexico. Methods The scab responses on foliage and fruit on each pecan tree was visually assessed in 2018 and 2019. Both a most severe measure (most severely infected leaf or fruit), and an overall tree rating was taken. Scab severity data were analyzed using a mixed linear model with means separation to explore provenance and family within provenance scab susceptibilities. Results Significant differences in scab susceptibility between provenances and among families within provenances were detected. Trees from provenances in Illinois, Kansas, Kentucky, Missouri, Mississippi, Tennessee and Texas, USA, showed the greatest resistance (based on mean scab severity) for both foliar and fruit scab. Assessments of scab on foliage and fruit gave similar results, as did the values for the most severe scab in the tree and the overall scab severity score. Of the 875 trees assessed, 201 trees had no detectable scab symptoms on foliage or fruit in either year. An additional 116 trees were free of scab symptoms on foliage but did not produce fruit in either year. Those provenances, families within provenances and trees with greatest resistance to scab most often originated from provenance locations with higher rainfall and consequently would be under selection to adapt to scab. Conclusions Identifying populations with most diverse resistance, and those most consistently resistant trees can serve as a resource to develop a better understanding of the scab resistance mechanisms. These natural sources of scab resistance coupled with molecular and genomics tools will contribute to the accelerated development of new pecan cultivars with durable resistance to scab. Disease severity (dpeaa)DE-He213 Disease assessment (dpeaa)DE-He213 Disease control (dpeaa)DE-He213 Host resistance (dpeaa)DE-He213 Plant breeding (dpeaa)DE-He213 Alarcon, Yanina verfasserin aut Conner, Patrick J. verfasserin aut Young, Carolyn A. verfasserin aut Randall, Jennifer J. verfasserin aut Pisani, Cristina verfasserin aut Grauke, Larry J. verfasserin aut Wang, Xinwang verfasserin aut Monteros, Maria J. verfasserin aut Enthalten in CABI agriculture and bioscience [Wallingford] : CABI, 2020 1(2020), 1 vom: 23. Nov. (DE-627)1702017982 (DE-600)3028099-0 2662-4044 nnns volume:1 year:2020 number:1 day:23 month:11 https://dx.doi.org/10.1186/s43170-020-00020-9 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4367 GBV_ILN_4700 AR 1 2020 1 23 11
allfieldsGer	10.1186/s43170-020-00020-9 doi (DE-627)SPR042121175 (SPR)s43170-020-00020-9-e DE-627 ger DE-627 rakwb eng 630 ASE Bock, Clive H. verfasserin aut Foliage and fruit susceptibility of a pecan provenance collection to scab, caused by Venturia effusa 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Background Pecan (Carya illinoinensis) is an important native nut crop in the southern USA. In the Southeast, scab (caused by Venturia effusa) is a major constraint to production, and can result in significant yield losses. The breadth of sources of resistance are poorly defined, and the genetics of resistance has not been established. The aim of this study was to assess the severity of pecan scab on foliage and fruit of the trees in a collection at Georgia, USA, of 875 native pecan genotypes from 93 families in 19 provenances in various states in the USA and Mexico. Methods The scab responses on foliage and fruit on each pecan tree was visually assessed in 2018 and 2019. Both a most severe measure (most severely infected leaf or fruit), and an overall tree rating was taken. Scab severity data were analyzed using a mixed linear model with means separation to explore provenance and family within provenance scab susceptibilities. Results Significant differences in scab susceptibility between provenances and among families within provenances were detected. Trees from provenances in Illinois, Kansas, Kentucky, Missouri, Mississippi, Tennessee and Texas, USA, showed the greatest resistance (based on mean scab severity) for both foliar and fruit scab. Assessments of scab on foliage and fruit gave similar results, as did the values for the most severe scab in the tree and the overall scab severity score. Of the 875 trees assessed, 201 trees had no detectable scab symptoms on foliage or fruit in either year. An additional 116 trees were free of scab symptoms on foliage but did not produce fruit in either year. Those provenances, families within provenances and trees with greatest resistance to scab most often originated from provenance locations with higher rainfall and consequently would be under selection to adapt to scab. Conclusions Identifying populations with most diverse resistance, and those most consistently resistant trees can serve as a resource to develop a better understanding of the scab resistance mechanisms. These natural sources of scab resistance coupled with molecular and genomics tools will contribute to the accelerated development of new pecan cultivars with durable resistance to scab. Disease severity (dpeaa)DE-He213 Disease assessment (dpeaa)DE-He213 Disease control (dpeaa)DE-He213 Host resistance (dpeaa)DE-He213 Plant breeding (dpeaa)DE-He213 Alarcon, Yanina verfasserin aut Conner, Patrick J. verfasserin aut Young, Carolyn A. verfasserin aut Randall, Jennifer J. verfasserin aut Pisani, Cristina verfasserin aut Grauke, Larry J. verfasserin aut Wang, Xinwang verfasserin aut Monteros, Maria J. verfasserin aut Enthalten in CABI agriculture and bioscience [Wallingford] : CABI, 2020 1(2020), 1 vom: 23. Nov. (DE-627)1702017982 (DE-600)3028099-0 2662-4044 nnns volume:1 year:2020 number:1 day:23 month:11 https://dx.doi.org/10.1186/s43170-020-00020-9 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4367 GBV_ILN_4700 AR 1 2020 1 23 11
allfieldsSound	10.1186/s43170-020-00020-9 doi (DE-627)SPR042121175 (SPR)s43170-020-00020-9-e DE-627 ger DE-627 rakwb eng 630 ASE Bock, Clive H. verfasserin aut Foliage and fruit susceptibility of a pecan provenance collection to scab, caused by Venturia effusa 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Background Pecan (Carya illinoinensis) is an important native nut crop in the southern USA. In the Southeast, scab (caused by Venturia effusa) is a major constraint to production, and can result in significant yield losses. The breadth of sources of resistance are poorly defined, and the genetics of resistance has not been established. The aim of this study was to assess the severity of pecan scab on foliage and fruit of the trees in a collection at Georgia, USA, of 875 native pecan genotypes from 93 families in 19 provenances in various states in the USA and Mexico. Methods The scab responses on foliage and fruit on each pecan tree was visually assessed in 2018 and 2019. Both a most severe measure (most severely infected leaf or fruit), and an overall tree rating was taken. Scab severity data were analyzed using a mixed linear model with means separation to explore provenance and family within provenance scab susceptibilities. Results Significant differences in scab susceptibility between provenances and among families within provenances were detected. Trees from provenances in Illinois, Kansas, Kentucky, Missouri, Mississippi, Tennessee and Texas, USA, showed the greatest resistance (based on mean scab severity) for both foliar and fruit scab. Assessments of scab on foliage and fruit gave similar results, as did the values for the most severe scab in the tree and the overall scab severity score. Of the 875 trees assessed, 201 trees had no detectable scab symptoms on foliage or fruit in either year. An additional 116 trees were free of scab symptoms on foliage but did not produce fruit in either year. Those provenances, families within provenances and trees with greatest resistance to scab most often originated from provenance locations with higher rainfall and consequently would be under selection to adapt to scab. Conclusions Identifying populations with most diverse resistance, and those most consistently resistant trees can serve as a resource to develop a better understanding of the scab resistance mechanisms. These natural sources of scab resistance coupled with molecular and genomics tools will contribute to the accelerated development of new pecan cultivars with durable resistance to scab. Disease severity (dpeaa)DE-He213 Disease assessment (dpeaa)DE-He213 Disease control (dpeaa)DE-He213 Host resistance (dpeaa)DE-He213 Plant breeding (dpeaa)DE-He213 Alarcon, Yanina verfasserin aut Conner, Patrick J. verfasserin aut Young, Carolyn A. verfasserin aut Randall, Jennifer J. verfasserin aut Pisani, Cristina verfasserin aut Grauke, Larry J. verfasserin aut Wang, Xinwang verfasserin aut Monteros, Maria J. verfasserin aut Enthalten in CABI agriculture and bioscience [Wallingford] : CABI, 2020 1(2020), 1 vom: 23. Nov. (DE-627)1702017982 (DE-600)3028099-0 2662-4044 nnns volume:1 year:2020 number:1 day:23 month:11 https://dx.doi.org/10.1186/s43170-020-00020-9 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4367 GBV_ILN_4700 AR 1 2020 1 23 11
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source	Enthalten in CABI agriculture and bioscience 1(2020), 1 vom: 23. Nov. volume:1 year:2020 number:1 day:23 month:11
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authorswithroles_txt_mv	Bock, Clive H. @@aut@@ Alarcon, Yanina @@aut@@ Conner, Patrick J. @@aut@@ Young, Carolyn A. @@aut@@ Randall, Jennifer J. @@aut@@ Pisani, Cristina @@aut@@ Grauke, Larry J. @@aut@@ Wang, Xinwang @@aut@@ Monteros, Maria J. @@aut@@
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In the Southeast, scab (caused by Venturia effusa) is a major constraint to production, and can result in significant yield losses. The breadth of sources of resistance are poorly defined, and the genetics of resistance has not been established. The aim of this study was to assess the severity of pecan scab on foliage and fruit of the trees in a collection at Georgia, USA, of 875 native pecan genotypes from 93 families in 19 provenances in various states in the USA and Mexico. Methods The scab responses on foliage and fruit on each pecan tree was visually assessed in 2018 and 2019. Both a most severe measure (most severely infected leaf or fruit), and an overall tree rating was taken. Scab severity data were analyzed using a mixed linear model with means separation to explore provenance and family within provenance scab susceptibilities. Results Significant differences in scab susceptibility between provenances and among families within provenances were detected. Trees from provenances in Illinois, Kansas, Kentucky, Missouri, Mississippi, Tennessee and Texas, USA, showed the greatest resistance (based on mean scab severity) for both foliar and fruit scab. Assessments of scab on foliage and fruit gave similar results, as did the values for the most severe scab in the tree and the overall scab severity score. Of the 875 trees assessed, 201 trees had no detectable scab symptoms on foliage or fruit in either year. An additional 116 trees were free of scab symptoms on foliage but did not produce fruit in either year. Those provenances, families within provenances and trees with greatest resistance to scab most often originated from provenance locations with higher rainfall and consequently would be under selection to adapt to scab. Conclusions Identifying populations with most diverse resistance, and those most consistently resistant trees can serve as a resource to develop a better understanding of the scab resistance mechanisms. 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title	Foliage and fruit susceptibility of a pecan provenance collection to scab, caused by Venturia effusa
ctrlnum	(DE-627)SPR042121175 (SPR)s43170-020-00020-9-e
title_full	Foliage and fruit susceptibility of a pecan provenance collection to scab, caused by Venturia effusa
author_sort	Bock, Clive H.
journal	CABI agriculture and bioscience
journalStr	CABI agriculture and bioscience
lang_code	eng
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dewey-hundreds	600 - Technology
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author_browse	Bock, Clive H. Alarcon, Yanina Conner, Patrick J. Young, Carolyn A. Randall, Jennifer J. Pisani, Cristina Grauke, Larry J. Wang, Xinwang Monteros, Maria J.
container_volume	1
class	630 ASE
format_se	Elektronische Aufsätze
author-letter	Bock, Clive H.
doi_str_mv	10.1186/s43170-020-00020-9
dewey-full	630
author2-role	verfasserin
title_sort	foliage and fruit susceptibility of a pecan provenance collection to scab, caused by venturia effusa
title_auth	Foliage and fruit susceptibility of a pecan provenance collection to scab, caused by Venturia effusa
abstract	Background Pecan (Carya illinoinensis) is an important native nut crop in the southern USA. In the Southeast, scab (caused by Venturia effusa) is a major constraint to production, and can result in significant yield losses. The breadth of sources of resistance are poorly defined, and the genetics of resistance has not been established. The aim of this study was to assess the severity of pecan scab on foliage and fruit of the trees in a collection at Georgia, USA, of 875 native pecan genotypes from 93 families in 19 provenances in various states in the USA and Mexico. Methods The scab responses on foliage and fruit on each pecan tree was visually assessed in 2018 and 2019. Both a most severe measure (most severely infected leaf or fruit), and an overall tree rating was taken. Scab severity data were analyzed using a mixed linear model with means separation to explore provenance and family within provenance scab susceptibilities. Results Significant differences in scab susceptibility between provenances and among families within provenances were detected. Trees from provenances in Illinois, Kansas, Kentucky, Missouri, Mississippi, Tennessee and Texas, USA, showed the greatest resistance (based on mean scab severity) for both foliar and fruit scab. Assessments of scab on foliage and fruit gave similar results, as did the values for the most severe scab in the tree and the overall scab severity score. Of the 875 trees assessed, 201 trees had no detectable scab symptoms on foliage or fruit in either year. An additional 116 trees were free of scab symptoms on foliage but did not produce fruit in either year. Those provenances, families within provenances and trees with greatest resistance to scab most often originated from provenance locations with higher rainfall and consequently would be under selection to adapt to scab. Conclusions Identifying populations with most diverse resistance, and those most consistently resistant trees can serve as a resource to develop a better understanding of the scab resistance mechanisms. These natural sources of scab resistance coupled with molecular and genomics tools will contribute to the accelerated development of new pecan cultivars with durable resistance to scab.
abstractGer	Background Pecan (Carya illinoinensis) is an important native nut crop in the southern USA. In the Southeast, scab (caused by Venturia effusa) is a major constraint to production, and can result in significant yield losses. The breadth of sources of resistance are poorly defined, and the genetics of resistance has not been established. The aim of this study was to assess the severity of pecan scab on foliage and fruit of the trees in a collection at Georgia, USA, of 875 native pecan genotypes from 93 families in 19 provenances in various states in the USA and Mexico. Methods The scab responses on foliage and fruit on each pecan tree was visually assessed in 2018 and 2019. Both a most severe measure (most severely infected leaf or fruit), and an overall tree rating was taken. Scab severity data were analyzed using a mixed linear model with means separation to explore provenance and family within provenance scab susceptibilities. Results Significant differences in scab susceptibility between provenances and among families within provenances were detected. Trees from provenances in Illinois, Kansas, Kentucky, Missouri, Mississippi, Tennessee and Texas, USA, showed the greatest resistance (based on mean scab severity) for both foliar and fruit scab. Assessments of scab on foliage and fruit gave similar results, as did the values for the most severe scab in the tree and the overall scab severity score. Of the 875 trees assessed, 201 trees had no detectable scab symptoms on foliage or fruit in either year. An additional 116 trees were free of scab symptoms on foliage but did not produce fruit in either year. Those provenances, families within provenances and trees with greatest resistance to scab most often originated from provenance locations with higher rainfall and consequently would be under selection to adapt to scab. Conclusions Identifying populations with most diverse resistance, and those most consistently resistant trees can serve as a resource to develop a better understanding of the scab resistance mechanisms. These natural sources of scab resistance coupled with molecular and genomics tools will contribute to the accelerated development of new pecan cultivars with durable resistance to scab.
abstract_unstemmed	Background Pecan (Carya illinoinensis) is an important native nut crop in the southern USA. In the Southeast, scab (caused by Venturia effusa) is a major constraint to production, and can result in significant yield losses. The breadth of sources of resistance are poorly defined, and the genetics of resistance has not been established. The aim of this study was to assess the severity of pecan scab on foliage and fruit of the trees in a collection at Georgia, USA, of 875 native pecan genotypes from 93 families in 19 provenances in various states in the USA and Mexico. Methods The scab responses on foliage and fruit on each pecan tree was visually assessed in 2018 and 2019. Both a most severe measure (most severely infected leaf or fruit), and an overall tree rating was taken. Scab severity data were analyzed using a mixed linear model with means separation to explore provenance and family within provenance scab susceptibilities. Results Significant differences in scab susceptibility between provenances and among families within provenances were detected. Trees from provenances in Illinois, Kansas, Kentucky, Missouri, Mississippi, Tennessee and Texas, USA, showed the greatest resistance (based on mean scab severity) for both foliar and fruit scab. Assessments of scab on foliage and fruit gave similar results, as did the values for the most severe scab in the tree and the overall scab severity score. Of the 875 trees assessed, 201 trees had no detectable scab symptoms on foliage or fruit in either year. An additional 116 trees were free of scab symptoms on foliage but did not produce fruit in either year. Those provenances, families within provenances and trees with greatest resistance to scab most often originated from provenance locations with higher rainfall and consequently would be under selection to adapt to scab. Conclusions Identifying populations with most diverse resistance, and those most consistently resistant trees can serve as a resource to develop a better understanding of the scab resistance mechanisms. These natural sources of scab resistance coupled with molecular and genomics tools will contribute to the accelerated development of new pecan cultivars with durable resistance to scab.
collection_details	GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4367 GBV_ILN_4700
container_issue	1
title_short	Foliage and fruit susceptibility of a pecan provenance collection to scab, caused by Venturia effusa
url	https://dx.doi.org/10.1186/s43170-020-00020-9
remote_bool	true
author2	Alarcon, Yanina Conner, Patrick J. Young, Carolyn A. Randall, Jennifer J. Pisani, Cristina Grauke, Larry J. Wang, Xinwang Monteros, Maria J.
author2Str	Alarcon, Yanina Conner, Patrick J. Young, Carolyn A. Randall, Jennifer J. Pisani, Cristina Grauke, Larry J. Wang, Xinwang Monteros, Maria J.
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doi_str	10.1186/s43170-020-00020-9
up_date	2024-07-04T00:54:31.857Z
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