Evaluation of Yield-Based Low Nitrogen Tolerance Indices for Screening Maize (<i<Zea mays</i< L.) Inbred Lines

To screen the desired criterion to identify desirable genotypes and select genotypes best suited to limited nitrogen availability in order to facilitate the practice of low-nitrogen-tolerant breeding in maize, the response of 31 maize inbred lines, containing four control inbred lines (PH6WC, PH4CV,...
Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Zhixin Zhao [verfasserIn] Kunhui He [verfasserIn] Zhiqian Feng [verfasserIn] Yanan Li [verfasserIn] Liguo Chang [verfasserIn] Xinghua Zhang [verfasserIn] Shutu Xu [verfasserIn] Jianchao Liu [verfasserIn] Jiquan Xue [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2019

Schlagwörter:	maize screening indices low nitrogen tolerance grain yield

Übergeordnetes Werk:	In: Agronomy - MDPI AG, 2012, 9(2019), 5, p 240
Übergeordnetes Werk:	volume:9 ; year:2019 ; number:5, p 240

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.3390/agronomy9050240

Katalog-ID:	DOAJ05877615X

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520			\|a To screen the desired criterion to identify desirable genotypes and select genotypes best suited to limited nitrogen availability in order to facilitate the practice of low-nitrogen-tolerant breeding in maize, the response of 31 maize inbred lines, containing four control inbred lines (PH6WC, PH4CV, Zheng58, and Chang7-2) and others selected from the Shaan A and Shaan B heterotic groups cultivated at Northwest A&F University (Yangling, Shaanxi, China), were evaluated. The experiment was conducted following a split plot design with two replications during three growing seasons (2015, 2016, and 2017) under both high nitrogen (HN) and low nitrogen (LN) conditions at the Yulin and Yangling in Shaanxi Province, China. Seven screening indices, based on grain yield under two contrasting nitrogen (N) conditions, the stress susceptibility index (SSI), yield stability index (YSI), mean productivity (MP), geometric mean productivity (GMP), stress tolerance index (STI), harmonic mean (HM), and low nitrogen tolerance index (LNTI), were computed to assess the overall index that accurately screened the desirable genotypes. The results of the correlation analyses and principal component analysis showed that MP, GMP, HM and STI were correlated with grain yield significantly and positively under contrasting N conditions, and were able to accurately discriminate the desirable genotypes. Compared with the control inbred lines, many inbred lines selected from the Shaan A and Shaan B groups showed a higher LN tolerance. This shows that we can effectively improve the LN tolerance of maize inbred lines through LN screening. Based on the screening indices, the three-dimensional diagram and genotype and genotype × environment (GGE) biplots are agreed with this results, and we identified KA105, KB081, KA225, 91227, and 2013KB-47 as the desired genotypes that have the potential to be used to breed a high yield and stable hybrid.
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spelling	10.3390/agronomy9050240 doi (DE-627)DOAJ05877615X (DE-599)DOAJd82efe1f153e4b8d9967947c74c3c398 DE-627 ger DE-627 rakwb eng Zhixin Zhao verfasserin aut Evaluation of Yield-Based Low Nitrogen Tolerance Indices for Screening Maize (<i<Zea mays</i< L.) Inbred Lines 2019 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier To screen the desired criterion to identify desirable genotypes and select genotypes best suited to limited nitrogen availability in order to facilitate the practice of low-nitrogen-tolerant breeding in maize, the response of 31 maize inbred lines, containing four control inbred lines (PH6WC, PH4CV, Zheng58, and Chang7-2) and others selected from the Shaan A and Shaan B heterotic groups cultivated at Northwest A&F University (Yangling, Shaanxi, China), were evaluated. The experiment was conducted following a split plot design with two replications during three growing seasons (2015, 2016, and 2017) under both high nitrogen (HN) and low nitrogen (LN) conditions at the Yulin and Yangling in Shaanxi Province, China. Seven screening indices, based on grain yield under two contrasting nitrogen (N) conditions, the stress susceptibility index (SSI), yield stability index (YSI), mean productivity (MP), geometric mean productivity (GMP), stress tolerance index (STI), harmonic mean (HM), and low nitrogen tolerance index (LNTI), were computed to assess the overall index that accurately screened the desirable genotypes. The results of the correlation analyses and principal component analysis showed that MP, GMP, HM and STI were correlated with grain yield significantly and positively under contrasting N conditions, and were able to accurately discriminate the desirable genotypes. Compared with the control inbred lines, many inbred lines selected from the Shaan A and Shaan B groups showed a higher LN tolerance. This shows that we can effectively improve the LN tolerance of maize inbred lines through LN screening. Based on the screening indices, the three-dimensional diagram and genotype and genotype × environment (GGE) biplots are agreed with this results, and we identified KA105, KB081, KA225, 91227, and 2013KB-47 as the desired genotypes that have the potential to be used to breed a high yield and stable hybrid. maize screening indices low nitrogen tolerance grain yield Agriculture S Kunhui He verfasserin aut Zhiqian Feng verfasserin aut Yanan Li verfasserin aut Liguo Chang verfasserin aut Xinghua Zhang verfasserin aut Shutu Xu verfasserin aut Jianchao Liu verfasserin aut Jiquan Xue verfasserin aut In Agronomy MDPI AG, 2012 9(2019), 5, p 240 (DE-627)658000543 (DE-600)2607043-1 20734395 nnns volume:9 year:2019 number:5, p 240 https://doi.org/10.3390/agronomy9050240 kostenfrei https://doaj.org/article/d82efe1f153e4b8d9967947c74c3c398 kostenfrei https://www.mdpi.com/2073-4395/9/5/240 kostenfrei https://doaj.org/toc/2073-4395 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 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_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_4326 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 9 2019 5, p 240
allfields_unstemmed	10.3390/agronomy9050240 doi (DE-627)DOAJ05877615X (DE-599)DOAJd82efe1f153e4b8d9967947c74c3c398 DE-627 ger DE-627 rakwb eng Zhixin Zhao verfasserin aut Evaluation of Yield-Based Low Nitrogen Tolerance Indices for Screening Maize (<i<Zea mays</i< L.) Inbred Lines 2019 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier To screen the desired criterion to identify desirable genotypes and select genotypes best suited to limited nitrogen availability in order to facilitate the practice of low-nitrogen-tolerant breeding in maize, the response of 31 maize inbred lines, containing four control inbred lines (PH6WC, PH4CV, Zheng58, and Chang7-2) and others selected from the Shaan A and Shaan B heterotic groups cultivated at Northwest A&F University (Yangling, Shaanxi, China), were evaluated. The experiment was conducted following a split plot design with two replications during three growing seasons (2015, 2016, and 2017) under both high nitrogen (HN) and low nitrogen (LN) conditions at the Yulin and Yangling in Shaanxi Province, China. Seven screening indices, based on grain yield under two contrasting nitrogen (N) conditions, the stress susceptibility index (SSI), yield stability index (YSI), mean productivity (MP), geometric mean productivity (GMP), stress tolerance index (STI), harmonic mean (HM), and low nitrogen tolerance index (LNTI), were computed to assess the overall index that accurately screened the desirable genotypes. The results of the correlation analyses and principal component analysis showed that MP, GMP, HM and STI were correlated with grain yield significantly and positively under contrasting N conditions, and were able to accurately discriminate the desirable genotypes. Compared with the control inbred lines, many inbred lines selected from the Shaan A and Shaan B groups showed a higher LN tolerance. This shows that we can effectively improve the LN tolerance of maize inbred lines through LN screening. Based on the screening indices, the three-dimensional diagram and genotype and genotype × environment (GGE) biplots are agreed with this results, and we identified KA105, KB081, KA225, 91227, and 2013KB-47 as the desired genotypes that have the potential to be used to breed a high yield and stable hybrid. maize screening indices low nitrogen tolerance grain yield Agriculture S Kunhui He verfasserin aut Zhiqian Feng verfasserin aut Yanan Li verfasserin aut Liguo Chang verfasserin aut Xinghua Zhang verfasserin aut Shutu Xu verfasserin aut Jianchao Liu verfasserin aut Jiquan Xue verfasserin aut In Agronomy MDPI AG, 2012 9(2019), 5, p 240 (DE-627)658000543 (DE-600)2607043-1 20734395 nnns volume:9 year:2019 number:5, p 240 https://doi.org/10.3390/agronomy9050240 kostenfrei https://doaj.org/article/d82efe1f153e4b8d9967947c74c3c398 kostenfrei https://www.mdpi.com/2073-4395/9/5/240 kostenfrei https://doaj.org/toc/2073-4395 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 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_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_4326 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 9 2019 5, p 240
allfieldsGer	10.3390/agronomy9050240 doi (DE-627)DOAJ05877615X (DE-599)DOAJd82efe1f153e4b8d9967947c74c3c398 DE-627 ger DE-627 rakwb eng Zhixin Zhao verfasserin aut Evaluation of Yield-Based Low Nitrogen Tolerance Indices for Screening Maize (<i<Zea mays</i< L.) Inbred Lines 2019 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier To screen the desired criterion to identify desirable genotypes and select genotypes best suited to limited nitrogen availability in order to facilitate the practice of low-nitrogen-tolerant breeding in maize, the response of 31 maize inbred lines, containing four control inbred lines (PH6WC, PH4CV, Zheng58, and Chang7-2) and others selected from the Shaan A and Shaan B heterotic groups cultivated at Northwest A&F University (Yangling, Shaanxi, China), were evaluated. The experiment was conducted following a split plot design with two replications during three growing seasons (2015, 2016, and 2017) under both high nitrogen (HN) and low nitrogen (LN) conditions at the Yulin and Yangling in Shaanxi Province, China. Seven screening indices, based on grain yield under two contrasting nitrogen (N) conditions, the stress susceptibility index (SSI), yield stability index (YSI), mean productivity (MP), geometric mean productivity (GMP), stress tolerance index (STI), harmonic mean (HM), and low nitrogen tolerance index (LNTI), were computed to assess the overall index that accurately screened the desirable genotypes. The results of the correlation analyses and principal component analysis showed that MP, GMP, HM and STI were correlated with grain yield significantly and positively under contrasting N conditions, and were able to accurately discriminate the desirable genotypes. Compared with the control inbred lines, many inbred lines selected from the Shaan A and Shaan B groups showed a higher LN tolerance. This shows that we can effectively improve the LN tolerance of maize inbred lines through LN screening. Based on the screening indices, the three-dimensional diagram and genotype and genotype × environment (GGE) biplots are agreed with this results, and we identified KA105, KB081, KA225, 91227, and 2013KB-47 as the desired genotypes that have the potential to be used to breed a high yield and stable hybrid. maize screening indices low nitrogen tolerance grain yield Agriculture S Kunhui He verfasserin aut Zhiqian Feng verfasserin aut Yanan Li verfasserin aut Liguo Chang verfasserin aut Xinghua Zhang verfasserin aut Shutu Xu verfasserin aut Jianchao Liu verfasserin aut Jiquan Xue verfasserin aut In Agronomy MDPI AG, 2012 9(2019), 5, p 240 (DE-627)658000543 (DE-600)2607043-1 20734395 nnns volume:9 year:2019 number:5, p 240 https://doi.org/10.3390/agronomy9050240 kostenfrei https://doaj.org/article/d82efe1f153e4b8d9967947c74c3c398 kostenfrei https://www.mdpi.com/2073-4395/9/5/240 kostenfrei https://doaj.org/toc/2073-4395 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 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_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_4326 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 9 2019 5, p 240
allfieldsSound	10.3390/agronomy9050240 doi (DE-627)DOAJ05877615X (DE-599)DOAJd82efe1f153e4b8d9967947c74c3c398 DE-627 ger DE-627 rakwb eng Zhixin Zhao verfasserin aut Evaluation of Yield-Based Low Nitrogen Tolerance Indices for Screening Maize (<i<Zea mays</i< L.) Inbred Lines 2019 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier To screen the desired criterion to identify desirable genotypes and select genotypes best suited to limited nitrogen availability in order to facilitate the practice of low-nitrogen-tolerant breeding in maize, the response of 31 maize inbred lines, containing four control inbred lines (PH6WC, PH4CV, Zheng58, and Chang7-2) and others selected from the Shaan A and Shaan B heterotic groups cultivated at Northwest A&F University (Yangling, Shaanxi, China), were evaluated. The experiment was conducted following a split plot design with two replications during three growing seasons (2015, 2016, and 2017) under both high nitrogen (HN) and low nitrogen (LN) conditions at the Yulin and Yangling in Shaanxi Province, China. Seven screening indices, based on grain yield under two contrasting nitrogen (N) conditions, the stress susceptibility index (SSI), yield stability index (YSI), mean productivity (MP), geometric mean productivity (GMP), stress tolerance index (STI), harmonic mean (HM), and low nitrogen tolerance index (LNTI), were computed to assess the overall index that accurately screened the desirable genotypes. The results of the correlation analyses and principal component analysis showed that MP, GMP, HM and STI were correlated with grain yield significantly and positively under contrasting N conditions, and were able to accurately discriminate the desirable genotypes. Compared with the control inbred lines, many inbred lines selected from the Shaan A and Shaan B groups showed a higher LN tolerance. This shows that we can effectively improve the LN tolerance of maize inbred lines through LN screening. Based on the screening indices, the three-dimensional diagram and genotype and genotype × environment (GGE) biplots are agreed with this results, and we identified KA105, KB081, KA225, 91227, and 2013KB-47 as the desired genotypes that have the potential to be used to breed a high yield and stable hybrid. maize screening indices low nitrogen tolerance grain yield Agriculture S Kunhui He verfasserin aut Zhiqian Feng verfasserin aut Yanan Li verfasserin aut Liguo Chang verfasserin aut Xinghua Zhang verfasserin aut Shutu Xu verfasserin aut Jianchao Liu verfasserin aut Jiquan Xue verfasserin aut In Agronomy MDPI AG, 2012 9(2019), 5, p 240 (DE-627)658000543 (DE-600)2607043-1 20734395 nnns volume:9 year:2019 number:5, p 240 https://doi.org/10.3390/agronomy9050240 kostenfrei https://doaj.org/article/d82efe1f153e4b8d9967947c74c3c398 kostenfrei https://www.mdpi.com/2073-4395/9/5/240 kostenfrei https://doaj.org/toc/2073-4395 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 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_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_4326 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 9 2019 5, p 240
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authorswithroles_txt_mv	Zhixin Zhao @@aut@@ Kunhui He @@aut@@ Zhiqian Feng @@aut@@ Yanan Li @@aut@@ Liguo Chang @@aut@@ Xinghua Zhang @@aut@@ Shutu Xu @@aut@@ Jianchao Liu @@aut@@ Jiquan Xue @@aut@@
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author	Zhixin Zhao
spellingShingle	Zhixin Zhao misc maize misc screening indices misc low nitrogen tolerance misc grain yield misc Agriculture misc S Evaluation of Yield-Based Low Nitrogen Tolerance Indices for Screening Maize (<i<Zea mays</i< L.) Inbred Lines
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topic_title	Evaluation of Yield-Based Low Nitrogen Tolerance Indices for Screening Maize (<i<Zea mays</i< L.) Inbred Lines maize screening indices low nitrogen tolerance grain yield
topic	misc maize misc screening indices misc low nitrogen tolerance misc grain yield misc Agriculture misc S
topic_unstemmed	misc maize misc screening indices misc low nitrogen tolerance misc grain yield misc Agriculture misc S
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title	Evaluation of Yield-Based Low Nitrogen Tolerance Indices for Screening Maize (<i<Zea mays</i< L.) Inbred Lines
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title_full	Evaluation of Yield-Based Low Nitrogen Tolerance Indices for Screening Maize (<i<Zea mays</i< L.) Inbred Lines
author_sort	Zhixin Zhao
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author_browse	Zhixin Zhao Kunhui He Zhiqian Feng Yanan Li Liguo Chang Xinghua Zhang Shutu Xu Jianchao Liu Jiquan Xue
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doi_str_mv	10.3390/agronomy9050240
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title_sort	evaluation of yield-based low nitrogen tolerance indices for screening maize (<i<zea mays</i< l.) inbred lines
title_auth	Evaluation of Yield-Based Low Nitrogen Tolerance Indices for Screening Maize (<i<Zea mays</i< L.) Inbred Lines
abstract	To screen the desired criterion to identify desirable genotypes and select genotypes best suited to limited nitrogen availability in order to facilitate the practice of low-nitrogen-tolerant breeding in maize, the response of 31 maize inbred lines, containing four control inbred lines (PH6WC, PH4CV, Zheng58, and Chang7-2) and others selected from the Shaan A and Shaan B heterotic groups cultivated at Northwest A&F University (Yangling, Shaanxi, China), were evaluated. The experiment was conducted following a split plot design with two replications during three growing seasons (2015, 2016, and 2017) under both high nitrogen (HN) and low nitrogen (LN) conditions at the Yulin and Yangling in Shaanxi Province, China. Seven screening indices, based on grain yield under two contrasting nitrogen (N) conditions, the stress susceptibility index (SSI), yield stability index (YSI), mean productivity (MP), geometric mean productivity (GMP), stress tolerance index (STI), harmonic mean (HM), and low nitrogen tolerance index (LNTI), were computed to assess the overall index that accurately screened the desirable genotypes. The results of the correlation analyses and principal component analysis showed that MP, GMP, HM and STI were correlated with grain yield significantly and positively under contrasting N conditions, and were able to accurately discriminate the desirable genotypes. Compared with the control inbred lines, many inbred lines selected from the Shaan A and Shaan B groups showed a higher LN tolerance. This shows that we can effectively improve the LN tolerance of maize inbred lines through LN screening. Based on the screening indices, the three-dimensional diagram and genotype and genotype × environment (GGE) biplots are agreed with this results, and we identified KA105, KB081, KA225, 91227, and 2013KB-47 as the desired genotypes that have the potential to be used to breed a high yield and stable hybrid.
abstractGer	To screen the desired criterion to identify desirable genotypes and select genotypes best suited to limited nitrogen availability in order to facilitate the practice of low-nitrogen-tolerant breeding in maize, the response of 31 maize inbred lines, containing four control inbred lines (PH6WC, PH4CV, Zheng58, and Chang7-2) and others selected from the Shaan A and Shaan B heterotic groups cultivated at Northwest A&F University (Yangling, Shaanxi, China), were evaluated. The experiment was conducted following a split plot design with two replications during three growing seasons (2015, 2016, and 2017) under both high nitrogen (HN) and low nitrogen (LN) conditions at the Yulin and Yangling in Shaanxi Province, China. Seven screening indices, based on grain yield under two contrasting nitrogen (N) conditions, the stress susceptibility index (SSI), yield stability index (YSI), mean productivity (MP), geometric mean productivity (GMP), stress tolerance index (STI), harmonic mean (HM), and low nitrogen tolerance index (LNTI), were computed to assess the overall index that accurately screened the desirable genotypes. The results of the correlation analyses and principal component analysis showed that MP, GMP, HM and STI were correlated with grain yield significantly and positively under contrasting N conditions, and were able to accurately discriminate the desirable genotypes. Compared with the control inbred lines, many inbred lines selected from the Shaan A and Shaan B groups showed a higher LN tolerance. This shows that we can effectively improve the LN tolerance of maize inbred lines through LN screening. Based on the screening indices, the three-dimensional diagram and genotype and genotype × environment (GGE) biplots are agreed with this results, and we identified KA105, KB081, KA225, 91227, and 2013KB-47 as the desired genotypes that have the potential to be used to breed a high yield and stable hybrid.
abstract_unstemmed	To screen the desired criterion to identify desirable genotypes and select genotypes best suited to limited nitrogen availability in order to facilitate the practice of low-nitrogen-tolerant breeding in maize, the response of 31 maize inbred lines, containing four control inbred lines (PH6WC, PH4CV, Zheng58, and Chang7-2) and others selected from the Shaan A and Shaan B heterotic groups cultivated at Northwest A&F University (Yangling, Shaanxi, China), were evaluated. The experiment was conducted following a split plot design with two replications during three growing seasons (2015, 2016, and 2017) under both high nitrogen (HN) and low nitrogen (LN) conditions at the Yulin and Yangling in Shaanxi Province, China. Seven screening indices, based on grain yield under two contrasting nitrogen (N) conditions, the stress susceptibility index (SSI), yield stability index (YSI), mean productivity (MP), geometric mean productivity (GMP), stress tolerance index (STI), harmonic mean (HM), and low nitrogen tolerance index (LNTI), were computed to assess the overall index that accurately screened the desirable genotypes. The results of the correlation analyses and principal component analysis showed that MP, GMP, HM and STI were correlated with grain yield significantly and positively under contrasting N conditions, and were able to accurately discriminate the desirable genotypes. Compared with the control inbred lines, many inbred lines selected from the Shaan A and Shaan B groups showed a higher LN tolerance. This shows that we can effectively improve the LN tolerance of maize inbred lines through LN screening. Based on the screening indices, the three-dimensional diagram and genotype and genotype × environment (GGE) biplots are agreed with this results, and we identified KA105, KB081, KA225, 91227, and 2013KB-47 as the desired genotypes that have the potential to be used to breed a high yield and stable hybrid.
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title_short	Evaluation of Yield-Based Low Nitrogen Tolerance Indices for Screening Maize (<i<Zea mays</i< L.) Inbred Lines
url	https://doi.org/10.3390/agronomy9050240 https://doaj.org/article/d82efe1f153e4b8d9967947c74c3c398 https://www.mdpi.com/2073-4395/9/5/240 https://doaj.org/toc/2073-4395
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Compared with the control inbred lines, many inbred lines selected from the Shaan A and Shaan B groups showed a higher LN tolerance. This shows that we can effectively improve the LN tolerance of maize inbred lines through LN screening. 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Evaluation of Yield-Based Low Nitrogen Tolerance Indices for Screening Maize (<i<Zea mays</i< L.) Inbred Lines

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