Managing genetic diversity in pig populations: implications of optimal contribution selection in the Black Slavonian pig

Implications of optimal contribution selection for litter size in the Black Slavonian pig were analysed using 23,882 litter records from 6764 sows. To obtain population parameters, pedigree analysis was performed for 7367 animals. The average inbreeding coefficient was 2.87%, the average inbreeding rate was 1.96%, and the effective population size was 25.52. The average maximum number of generations traced back was 4.12 and the average number of full generations was 1.17. Selection candidates were chosen using the following criteria: animals had no culling date in the record; animals had sufficient pedigree depth and an estimated breeding value. Using these criteria, 8 boars among 24 and 386 sows among 2028 were defined as selection candidates. Two scenarios were tested. The first scenario was based on the application of the traditional optimal contribution selection with the maximisation of genetic gain and restricting the mean kinship in the offspring accounting also for breeding values. The second scenario was based on minimising inbreeding by restricting the average kinship of the population. In the first scenario, different kinship constraints between candidates resulted in changing the number of selected animals and changed the average breeding values such that the number of selected candidates increased when the kinship constraint was stronger, with a simultaneous decrease in breeding values. The second scenario resulted in increased inbreeding when the additional weight on genetic gain was added. The results of the study showed that the use of optimal contribution selection in Black Slavonian is possible, however, with additional efforts to improve pedigree and data quality.HIGHLIGHTS Genetic diversity analysis and application of optimal contribution selection in the Black Slavonian pig were analysed using pedigree. Results indicate a recent loss of genetic variability in the Black Slavonian pig. Optimal contribution selection enabled simultaneous genetic improvement and achieving conservation goals. Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Dubravko Škorput [verfasserIn] Marija Špehar [verfasserIn] Zoran Luković [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2022

Schlagwörter:	pig selection optimal contributions inbreeding

Übergeordnetes Werk:	In: Italian Journal of Animal Science - Taylor & Francis Group, 2007, 21(2022), 1, Seite 1259-1267
Übergeordnetes Werk:	volume:21 ; year:2022 ; number:1 ; pages:1259-1267

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc Journal toc

DOI / URN:	10.1080/1828051X.2022.2104661

Katalog-ID:	DOAJ024270326

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allfields	10.1080/1828051X.2022.2104661 doi (DE-627)DOAJ024270326 (DE-599)DOAJ1423b9c7f25f4b63a65dc3e6fd1c97e6 DE-627 ger DE-627 rakwb eng SF1-1100 Dubravko Škorput verfasserin aut Managing genetic diversity in pig populations: implications of optimal contribution selection in the Black Slavonian pig 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Implications of optimal contribution selection for litter size in the Black Slavonian pig were analysed using 23,882 litter records from 6764 sows. To obtain population parameters, pedigree analysis was performed for 7367 animals. The average inbreeding coefficient was 2.87%, the average inbreeding rate was 1.96%, and the effective population size was 25.52. The average maximum number of generations traced back was 4.12 and the average number of full generations was 1.17. Selection candidates were chosen using the following criteria: animals had no culling date in the record; animals had sufficient pedigree depth and an estimated breeding value. Using these criteria, 8 boars among 24 and 386 sows among 2028 were defined as selection candidates. Two scenarios were tested. The first scenario was based on the application of the traditional optimal contribution selection with the maximisation of genetic gain and restricting the mean kinship in the offspring accounting also for breeding values. The second scenario was based on minimising inbreeding by restricting the average kinship of the population. In the first scenario, different kinship constraints between candidates resulted in changing the number of selected animals and changed the average breeding values such that the number of selected candidates increased when the kinship constraint was stronger, with a simultaneous decrease in breeding values. The second scenario resulted in increased inbreeding when the additional weight on genetic gain was added. The results of the study showed that the use of optimal contribution selection in Black Slavonian is possible, however, with additional efforts to improve pedigree and data quality.HIGHLIGHTS Genetic diversity analysis and application of optimal contribution selection in the Black Slavonian pig were analysed using pedigree. Results indicate a recent loss of genetic variability in the Black Slavonian pig. Optimal contribution selection enabled simultaneous genetic improvement and achieving conservation goals. pig selection optimal contributions inbreeding Animal culture Marija Špehar verfasserin aut Zoran Luković verfasserin aut In Italian Journal of Animal Science Taylor & Francis Group, 2007 21(2022), 1, Seite 1259-1267 (DE-627)558387608 (DE-600)2408994-1 1828051X nnns volume:21 year:2022 number:1 pages:1259-1267 https://doi.org/10.1080/1828051X.2022.2104661 kostenfrei https://doaj.org/article/1423b9c7f25f4b63a65dc3e6fd1c97e6 kostenfrei http://dx.doi.org/10.1080/1828051X.2022.2104661 kostenfrei https://doaj.org/toc/1594-4077 Journal toc kostenfrei https://doaj.org/toc/1828-051X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 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_4338 GBV_ILN_4367 GBV_ILN_4700 AR 21 2022 1 1259-1267
spelling	10.1080/1828051X.2022.2104661 doi (DE-627)DOAJ024270326 (DE-599)DOAJ1423b9c7f25f4b63a65dc3e6fd1c97e6 DE-627 ger DE-627 rakwb eng SF1-1100 Dubravko Škorput verfasserin aut Managing genetic diversity in pig populations: implications of optimal contribution selection in the Black Slavonian pig 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Implications of optimal contribution selection for litter size in the Black Slavonian pig were analysed using 23,882 litter records from 6764 sows. To obtain population parameters, pedigree analysis was performed for 7367 animals. The average inbreeding coefficient was 2.87%, the average inbreeding rate was 1.96%, and the effective population size was 25.52. The average maximum number of generations traced back was 4.12 and the average number of full generations was 1.17. Selection candidates were chosen using the following criteria: animals had no culling date in the record; animals had sufficient pedigree depth and an estimated breeding value. Using these criteria, 8 boars among 24 and 386 sows among 2028 were defined as selection candidates. Two scenarios were tested. The first scenario was based on the application of the traditional optimal contribution selection with the maximisation of genetic gain and restricting the mean kinship in the offspring accounting also for breeding values. The second scenario was based on minimising inbreeding by restricting the average kinship of the population. In the first scenario, different kinship constraints between candidates resulted in changing the number of selected animals and changed the average breeding values such that the number of selected candidates increased when the kinship constraint was stronger, with a simultaneous decrease in breeding values. The second scenario resulted in increased inbreeding when the additional weight on genetic gain was added. The results of the study showed that the use of optimal contribution selection in Black Slavonian is possible, however, with additional efforts to improve pedigree and data quality.HIGHLIGHTS Genetic diversity analysis and application of optimal contribution selection in the Black Slavonian pig were analysed using pedigree. Results indicate a recent loss of genetic variability in the Black Slavonian pig. Optimal contribution selection enabled simultaneous genetic improvement and achieving conservation goals. pig selection optimal contributions inbreeding Animal culture Marija Špehar verfasserin aut Zoran Luković verfasserin aut In Italian Journal of Animal Science Taylor & Francis Group, 2007 21(2022), 1, Seite 1259-1267 (DE-627)558387608 (DE-600)2408994-1 1828051X nnns volume:21 year:2022 number:1 pages:1259-1267 https://doi.org/10.1080/1828051X.2022.2104661 kostenfrei https://doaj.org/article/1423b9c7f25f4b63a65dc3e6fd1c97e6 kostenfrei http://dx.doi.org/10.1080/1828051X.2022.2104661 kostenfrei https://doaj.org/toc/1594-4077 Journal toc kostenfrei https://doaj.org/toc/1828-051X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 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_4338 GBV_ILN_4367 GBV_ILN_4700 AR 21 2022 1 1259-1267
allfields_unstemmed	10.1080/1828051X.2022.2104661 doi (DE-627)DOAJ024270326 (DE-599)DOAJ1423b9c7f25f4b63a65dc3e6fd1c97e6 DE-627 ger DE-627 rakwb eng SF1-1100 Dubravko Škorput verfasserin aut Managing genetic diversity in pig populations: implications of optimal contribution selection in the Black Slavonian pig 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Implications of optimal contribution selection for litter size in the Black Slavonian pig were analysed using 23,882 litter records from 6764 sows. To obtain population parameters, pedigree analysis was performed for 7367 animals. The average inbreeding coefficient was 2.87%, the average inbreeding rate was 1.96%, and the effective population size was 25.52. The average maximum number of generations traced back was 4.12 and the average number of full generations was 1.17. Selection candidates were chosen using the following criteria: animals had no culling date in the record; animals had sufficient pedigree depth and an estimated breeding value. Using these criteria, 8 boars among 24 and 386 sows among 2028 were defined as selection candidates. Two scenarios were tested. The first scenario was based on the application of the traditional optimal contribution selection with the maximisation of genetic gain and restricting the mean kinship in the offspring accounting also for breeding values. The second scenario was based on minimising inbreeding by restricting the average kinship of the population. In the first scenario, different kinship constraints between candidates resulted in changing the number of selected animals and changed the average breeding values such that the number of selected candidates increased when the kinship constraint was stronger, with a simultaneous decrease in breeding values. The second scenario resulted in increased inbreeding when the additional weight on genetic gain was added. The results of the study showed that the use of optimal contribution selection in Black Slavonian is possible, however, with additional efforts to improve pedigree and data quality.HIGHLIGHTS Genetic diversity analysis and application of optimal contribution selection in the Black Slavonian pig were analysed using pedigree. Results indicate a recent loss of genetic variability in the Black Slavonian pig. Optimal contribution selection enabled simultaneous genetic improvement and achieving conservation goals. pig selection optimal contributions inbreeding Animal culture Marija Špehar verfasserin aut Zoran Luković verfasserin aut In Italian Journal of Animal Science Taylor & Francis Group, 2007 21(2022), 1, Seite 1259-1267 (DE-627)558387608 (DE-600)2408994-1 1828051X nnns volume:21 year:2022 number:1 pages:1259-1267 https://doi.org/10.1080/1828051X.2022.2104661 kostenfrei https://doaj.org/article/1423b9c7f25f4b63a65dc3e6fd1c97e6 kostenfrei http://dx.doi.org/10.1080/1828051X.2022.2104661 kostenfrei https://doaj.org/toc/1594-4077 Journal toc kostenfrei https://doaj.org/toc/1828-051X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 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_4338 GBV_ILN_4367 GBV_ILN_4700 AR 21 2022 1 1259-1267
allfieldsGer	10.1080/1828051X.2022.2104661 doi (DE-627)DOAJ024270326 (DE-599)DOAJ1423b9c7f25f4b63a65dc3e6fd1c97e6 DE-627 ger DE-627 rakwb eng SF1-1100 Dubravko Škorput verfasserin aut Managing genetic diversity in pig populations: implications of optimal contribution selection in the Black Slavonian pig 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Implications of optimal contribution selection for litter size in the Black Slavonian pig were analysed using 23,882 litter records from 6764 sows. To obtain population parameters, pedigree analysis was performed for 7367 animals. The average inbreeding coefficient was 2.87%, the average inbreeding rate was 1.96%, and the effective population size was 25.52. The average maximum number of generations traced back was 4.12 and the average number of full generations was 1.17. Selection candidates were chosen using the following criteria: animals had no culling date in the record; animals had sufficient pedigree depth and an estimated breeding value. Using these criteria, 8 boars among 24 and 386 sows among 2028 were defined as selection candidates. Two scenarios were tested. The first scenario was based on the application of the traditional optimal contribution selection with the maximisation of genetic gain and restricting the mean kinship in the offspring accounting also for breeding values. The second scenario was based on minimising inbreeding by restricting the average kinship of the population. In the first scenario, different kinship constraints between candidates resulted in changing the number of selected animals and changed the average breeding values such that the number of selected candidates increased when the kinship constraint was stronger, with a simultaneous decrease in breeding values. The second scenario resulted in increased inbreeding when the additional weight on genetic gain was added. The results of the study showed that the use of optimal contribution selection in Black Slavonian is possible, however, with additional efforts to improve pedigree and data quality.HIGHLIGHTS Genetic diversity analysis and application of optimal contribution selection in the Black Slavonian pig were analysed using pedigree. Results indicate a recent loss of genetic variability in the Black Slavonian pig. Optimal contribution selection enabled simultaneous genetic improvement and achieving conservation goals. pig selection optimal contributions inbreeding Animal culture Marija Špehar verfasserin aut Zoran Luković verfasserin aut In Italian Journal of Animal Science Taylor & Francis Group, 2007 21(2022), 1, Seite 1259-1267 (DE-627)558387608 (DE-600)2408994-1 1828051X nnns volume:21 year:2022 number:1 pages:1259-1267 https://doi.org/10.1080/1828051X.2022.2104661 kostenfrei https://doaj.org/article/1423b9c7f25f4b63a65dc3e6fd1c97e6 kostenfrei http://dx.doi.org/10.1080/1828051X.2022.2104661 kostenfrei https://doaj.org/toc/1594-4077 Journal toc kostenfrei https://doaj.org/toc/1828-051X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 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_4338 GBV_ILN_4367 GBV_ILN_4700 AR 21 2022 1 1259-1267
allfieldsSound	10.1080/1828051X.2022.2104661 doi (DE-627)DOAJ024270326 (DE-599)DOAJ1423b9c7f25f4b63a65dc3e6fd1c97e6 DE-627 ger DE-627 rakwb eng SF1-1100 Dubravko Škorput verfasserin aut Managing genetic diversity in pig populations: implications of optimal contribution selection in the Black Slavonian pig 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Implications of optimal contribution selection for litter size in the Black Slavonian pig were analysed using 23,882 litter records from 6764 sows. To obtain population parameters, pedigree analysis was performed for 7367 animals. The average inbreeding coefficient was 2.87%, the average inbreeding rate was 1.96%, and the effective population size was 25.52. The average maximum number of generations traced back was 4.12 and the average number of full generations was 1.17. Selection candidates were chosen using the following criteria: animals had no culling date in the record; animals had sufficient pedigree depth and an estimated breeding value. Using these criteria, 8 boars among 24 and 386 sows among 2028 were defined as selection candidates. Two scenarios were tested. The first scenario was based on the application of the traditional optimal contribution selection with the maximisation of genetic gain and restricting the mean kinship in the offspring accounting also for breeding values. The second scenario was based on minimising inbreeding by restricting the average kinship of the population. In the first scenario, different kinship constraints between candidates resulted in changing the number of selected animals and changed the average breeding values such that the number of selected candidates increased when the kinship constraint was stronger, with a simultaneous decrease in breeding values. The second scenario resulted in increased inbreeding when the additional weight on genetic gain was added. The results of the study showed that the use of optimal contribution selection in Black Slavonian is possible, however, with additional efforts to improve pedigree and data quality.HIGHLIGHTS Genetic diversity analysis and application of optimal contribution selection in the Black Slavonian pig were analysed using pedigree. Results indicate a recent loss of genetic variability in the Black Slavonian pig. Optimal contribution selection enabled simultaneous genetic improvement and achieving conservation goals. pig selection optimal contributions inbreeding Animal culture Marija Špehar verfasserin aut Zoran Luković verfasserin aut In Italian Journal of Animal Science Taylor & Francis Group, 2007 21(2022), 1, Seite 1259-1267 (DE-627)558387608 (DE-600)2408994-1 1828051X nnns volume:21 year:2022 number:1 pages:1259-1267 https://doi.org/10.1080/1828051X.2022.2104661 kostenfrei https://doaj.org/article/1423b9c7f25f4b63a65dc3e6fd1c97e6 kostenfrei http://dx.doi.org/10.1080/1828051X.2022.2104661 kostenfrei https://doaj.org/toc/1594-4077 Journal toc kostenfrei https://doaj.org/toc/1828-051X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 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_4338 GBV_ILN_4367 GBV_ILN_4700 AR 21 2022 1 1259-1267
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callnumber-first	S - Agriculture
author	Dubravko Škorput
spellingShingle	Dubravko Škorput misc SF1-1100 misc pig misc selection misc optimal contributions misc inbreeding misc Animal culture Managing genetic diversity in pig populations: implications of optimal contribution selection in the Black Slavonian pig
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topic_title	SF1-1100 Managing genetic diversity in pig populations: implications of optimal contribution selection in the Black Slavonian pig pig selection optimal contributions inbreeding
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title	Managing genetic diversity in pig populations: implications of optimal contribution selection in the Black Slavonian pig
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title_full	Managing genetic diversity in pig populations: implications of optimal contribution selection in the Black Slavonian pig
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title_sort	managing genetic diversity in pig populations: implications of optimal contribution selection in the black slavonian pig
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title_auth	Managing genetic diversity in pig populations: implications of optimal contribution selection in the Black Slavonian pig
abstract	Implications of optimal contribution selection for litter size in the Black Slavonian pig were analysed using 23,882 litter records from 6764 sows. To obtain population parameters, pedigree analysis was performed for 7367 animals. The average inbreeding coefficient was 2.87%, the average inbreeding rate was 1.96%, and the effective population size was 25.52. The average maximum number of generations traced back was 4.12 and the average number of full generations was 1.17. Selection candidates were chosen using the following criteria: animals had no culling date in the record; animals had sufficient pedigree depth and an estimated breeding value. Using these criteria, 8 boars among 24 and 386 sows among 2028 were defined as selection candidates. Two scenarios were tested. The first scenario was based on the application of the traditional optimal contribution selection with the maximisation of genetic gain and restricting the mean kinship in the offspring accounting also for breeding values. The second scenario was based on minimising inbreeding by restricting the average kinship of the population. In the first scenario, different kinship constraints between candidates resulted in changing the number of selected animals and changed the average breeding values such that the number of selected candidates increased when the kinship constraint was stronger, with a simultaneous decrease in breeding values. The second scenario resulted in increased inbreeding when the additional weight on genetic gain was added. The results of the study showed that the use of optimal contribution selection in Black Slavonian is possible, however, with additional efforts to improve pedigree and data quality.HIGHLIGHTS Genetic diversity analysis and application of optimal contribution selection in the Black Slavonian pig were analysed using pedigree. Results indicate a recent loss of genetic variability in the Black Slavonian pig. Optimal contribution selection enabled simultaneous genetic improvement and achieving conservation goals.
abstractGer	Implications of optimal contribution selection for litter size in the Black Slavonian pig were analysed using 23,882 litter records from 6764 sows. To obtain population parameters, pedigree analysis was performed for 7367 animals. The average inbreeding coefficient was 2.87%, the average inbreeding rate was 1.96%, and the effective population size was 25.52. The average maximum number of generations traced back was 4.12 and the average number of full generations was 1.17. Selection candidates were chosen using the following criteria: animals had no culling date in the record; animals had sufficient pedigree depth and an estimated breeding value. Using these criteria, 8 boars among 24 and 386 sows among 2028 were defined as selection candidates. Two scenarios were tested. The first scenario was based on the application of the traditional optimal contribution selection with the maximisation of genetic gain and restricting the mean kinship in the offspring accounting also for breeding values. The second scenario was based on minimising inbreeding by restricting the average kinship of the population. In the first scenario, different kinship constraints between candidates resulted in changing the number of selected animals and changed the average breeding values such that the number of selected candidates increased when the kinship constraint was stronger, with a simultaneous decrease in breeding values. The second scenario resulted in increased inbreeding when the additional weight on genetic gain was added. The results of the study showed that the use of optimal contribution selection in Black Slavonian is possible, however, with additional efforts to improve pedigree and data quality.HIGHLIGHTS Genetic diversity analysis and application of optimal contribution selection in the Black Slavonian pig were analysed using pedigree. Results indicate a recent loss of genetic variability in the Black Slavonian pig. Optimal contribution selection enabled simultaneous genetic improvement and achieving conservation goals.
abstract_unstemmed	Implications of optimal contribution selection for litter size in the Black Slavonian pig were analysed using 23,882 litter records from 6764 sows. To obtain population parameters, pedigree analysis was performed for 7367 animals. The average inbreeding coefficient was 2.87%, the average inbreeding rate was 1.96%, and the effective population size was 25.52. The average maximum number of generations traced back was 4.12 and the average number of full generations was 1.17. Selection candidates were chosen using the following criteria: animals had no culling date in the record; animals had sufficient pedigree depth and an estimated breeding value. Using these criteria, 8 boars among 24 and 386 sows among 2028 were defined as selection candidates. Two scenarios were tested. The first scenario was based on the application of the traditional optimal contribution selection with the maximisation of genetic gain and restricting the mean kinship in the offspring accounting also for breeding values. The second scenario was based on minimising inbreeding by restricting the average kinship of the population. In the first scenario, different kinship constraints between candidates resulted in changing the number of selected animals and changed the average breeding values such that the number of selected candidates increased when the kinship constraint was stronger, with a simultaneous decrease in breeding values. The second scenario resulted in increased inbreeding when the additional weight on genetic gain was added. The results of the study showed that the use of optimal contribution selection in Black Slavonian is possible, however, with additional efforts to improve pedigree and data quality.HIGHLIGHTS Genetic diversity analysis and application of optimal contribution selection in the Black Slavonian pig were analysed using pedigree. Results indicate a recent loss of genetic variability in the Black Slavonian pig. Optimal contribution selection enabled simultaneous genetic improvement and achieving conservation goals.
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title_short	Managing genetic diversity in pig populations: implications of optimal contribution selection in the Black Slavonian pig
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In the first scenario, different kinship constraints between candidates resulted in changing the number of selected animals and changed the average breeding values such that the number of selected candidates increased when the kinship constraint was stronger, with a simultaneous decrease in breeding values. The second scenario resulted in increased inbreeding when the additional weight on genetic gain was added. The results of the study showed that the use of optimal contribution selection in Black Slavonian is possible, however, with additional efforts to improve pedigree and data quality.HIGHLIGHTS Genetic diversity analysis and application of optimal contribution selection in the Black Slavonian pig were analysed using pedigree. Results indicate a recent loss of genetic variability in the Black Slavonian pig. 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Managing genetic diversity in pig populations: implications of optimal contribution selection in the Black Slavonian pig

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