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Genetic analysis of Upland cotton dynamic heterosis for boll number per plant at multiple developmental stages

Yield is an important breeding target. As important yield components, boll number per plant (BNP) shows dynamic character and strong heterosis in Upland cotton. However, the genetic basis underlying the dynamic heterosis is poorly understood. In this study, we conducted dynamic quantitative trait lo...

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Autores principales: Shang, Lianguang, Wang, Yumei, Cai, Shihu, Ma, Lingling, Liu, Fang, Chen, Zhiwen, Su, Ying, Wang, Kunbo, Hua, Jinping
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5066282/
https://www.ncbi.nlm.nih.gov/pubmed/27748451
http://dx.doi.org/10.1038/srep35515
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author Shang, Lianguang
Wang, Yumei
Cai, Shihu
Ma, Lingling
Liu, Fang
Chen, Zhiwen
Su, Ying
Wang, Kunbo
Hua, Jinping
author_facet Shang, Lianguang
Wang, Yumei
Cai, Shihu
Ma, Lingling
Liu, Fang
Chen, Zhiwen
Su, Ying
Wang, Kunbo
Hua, Jinping
author_sort Shang, Lianguang
collection PubMed
description Yield is an important breeding target. As important yield components, boll number per plant (BNP) shows dynamic character and strong heterosis in Upland cotton. However, the genetic basis underlying the dynamic heterosis is poorly understood. In this study, we conducted dynamic quantitative trait loci (QTL) analysis for BNP and heterosis at multiple developmental stages and environments using two recombinant inbred lines (RILs) and two corresponding backcross populations. By the single-locus analysis, 23 QTLs were identified at final maturity, while 99 QTLs were identified across other three developmental stages. A total of 48 conditional QTLs for BNP were identified for the adjacent stages. QTLs detected at later stage mainly existed in the partial dominance to dominance range and QTLs identified at early stage mostly showed effects with the dominance to overdominance range during plant development. By two-locus analysis, we observe that epistasis played an important role not only in the variation of the performance of the RIL population but also in the expression of heterosis in backcross population. Taken together, the present study reveals that the genetic basis of heterosis is dynamic and complicated, and it is involved in dynamic dominance effect, epistasis and QTL by environmental interactions.
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spelling pubmed-50662822016-10-26 Genetic analysis of Upland cotton dynamic heterosis for boll number per plant at multiple developmental stages Shang, Lianguang Wang, Yumei Cai, Shihu Ma, Lingling Liu, Fang Chen, Zhiwen Su, Ying Wang, Kunbo Hua, Jinping Sci Rep Article Yield is an important breeding target. As important yield components, boll number per plant (BNP) shows dynamic character and strong heterosis in Upland cotton. However, the genetic basis underlying the dynamic heterosis is poorly understood. In this study, we conducted dynamic quantitative trait loci (QTL) analysis for BNP and heterosis at multiple developmental stages and environments using two recombinant inbred lines (RILs) and two corresponding backcross populations. By the single-locus analysis, 23 QTLs were identified at final maturity, while 99 QTLs were identified across other three developmental stages. A total of 48 conditional QTLs for BNP were identified for the adjacent stages. QTLs detected at later stage mainly existed in the partial dominance to dominance range and QTLs identified at early stage mostly showed effects with the dominance to overdominance range during plant development. By two-locus analysis, we observe that epistasis played an important role not only in the variation of the performance of the RIL population but also in the expression of heterosis in backcross population. Taken together, the present study reveals that the genetic basis of heterosis is dynamic and complicated, and it is involved in dynamic dominance effect, epistasis and QTL by environmental interactions. Nature Publishing Group 2016-10-17 /pmc/articles/PMC5066282/ /pubmed/27748451 http://dx.doi.org/10.1038/srep35515 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Shang, Lianguang
Wang, Yumei
Cai, Shihu
Ma, Lingling
Liu, Fang
Chen, Zhiwen
Su, Ying
Wang, Kunbo
Hua, Jinping
Genetic analysis of Upland cotton dynamic heterosis for boll number per plant at multiple developmental stages
title Genetic analysis of Upland cotton dynamic heterosis for boll number per plant at multiple developmental stages
title_full Genetic analysis of Upland cotton dynamic heterosis for boll number per plant at multiple developmental stages
title_fullStr Genetic analysis of Upland cotton dynamic heterosis for boll number per plant at multiple developmental stages
title_full_unstemmed Genetic analysis of Upland cotton dynamic heterosis for boll number per plant at multiple developmental stages
title_short Genetic analysis of Upland cotton dynamic heterosis for boll number per plant at multiple developmental stages
title_sort genetic analysis of upland cotton dynamic heterosis for boll number per plant at multiple developmental stages
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5066282/
https://www.ncbi.nlm.nih.gov/pubmed/27748451
http://dx.doi.org/10.1038/srep35515
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