Genome-wide dissection of heterosis for yield traits in two-line hybrid rice populations

Abstract Heterosis has been widely utilized in agriculture and is important for world food safety. Many genetic models have been proposed as mechanisms underlying heterosis during the past century, yet more evidence is needed to support such models. To investigate heterosis in two-line hybrid rice,...

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Autores principales:	Gang Zhen, Peng Qin, Kai Yu Liu, Dong Yang Nie, Yuan Zhu Yang, Xing Wang Deng, Hang He
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e5130bedc6f74e63912ef4e9fe2487c2
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spelling	oai:doaj.org-article:e5130bedc6f74e63912ef4e9fe2487c22021-12-02T15:06:16ZGenome-wide dissection of heterosis for yield traits in two-line hybrid rice populations10.1038/s41598-017-06742-72045-2322https://doaj.org/article/e5130bedc6f74e63912ef4e9fe2487c22017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-06742-7https://doaj.org/toc/2045-2322Abstract Heterosis has been widely utilized in agriculture and is important for world food safety. Many genetic models have been proposed as mechanisms underlying heterosis during the past century, yet more evidence is needed to support such models. To investigate heterosis in two-line hybrid rice, we generated a partial diallel crossing scheme, which consisted of approximately 500 F1 hybrids derived from 14 male sterile lines and 39 restorer lines. In this population, increased panicle number played the most important role in yield heterosis of hybrid rice. Genome-wide association studies identified many QTLs related to the yield traits of F1 hybrids, better paternal heterosis and special combining ability. Relevant genes, including Hd3a, qGL3, OsmiR156h, and LAX2, were identified as candidates within these QTLs. Nearly forty percent of the QTLs had only two genotypes in the F1 hybrids, mainly because the maternal lines were under intense selective pressure. Further analysis found male sterile lines and restorer lines made different superior allele contributions to F1 hybrids, and their contributions varied among different traits. These results extend our understanding of the molecular basis of heterosis in two-line hybrid rice.Gang ZhenPeng QinKai Yu LiuDong Yang NieYuan Zhu YangXing Wang DengHang HeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-14 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Gang Zhen Peng Qin Kai Yu Liu Dong Yang Nie Yuan Zhu Yang Xing Wang Deng Hang He Genome-wide dissection of heterosis for yield traits in two-line hybrid rice populations
description	Abstract Heterosis has been widely utilized in agriculture and is important for world food safety. Many genetic models have been proposed as mechanisms underlying heterosis during the past century, yet more evidence is needed to support such models. To investigate heterosis in two-line hybrid rice, we generated a partial diallel crossing scheme, which consisted of approximately 500 F1 hybrids derived from 14 male sterile lines and 39 restorer lines. In this population, increased panicle number played the most important role in yield heterosis of hybrid rice. Genome-wide association studies identified many QTLs related to the yield traits of F1 hybrids, better paternal heterosis and special combining ability. Relevant genes, including Hd3a, qGL3, OsmiR156h, and LAX2, were identified as candidates within these QTLs. Nearly forty percent of the QTLs had only two genotypes in the F1 hybrids, mainly because the maternal lines were under intense selective pressure. Further analysis found male sterile lines and restorer lines made different superior allele contributions to F1 hybrids, and their contributions varied among different traits. These results extend our understanding of the molecular basis of heterosis in two-line hybrid rice.
format	article
author	Gang Zhen Peng Qin Kai Yu Liu Dong Yang Nie Yuan Zhu Yang Xing Wang Deng Hang He
author_facet	Gang Zhen Peng Qin Kai Yu Liu Dong Yang Nie Yuan Zhu Yang Xing Wang Deng Hang He
author_sort	Gang Zhen
title	Genome-wide dissection of heterosis for yield traits in two-line hybrid rice populations
title_short	Genome-wide dissection of heterosis for yield traits in two-line hybrid rice populations
title_full	Genome-wide dissection of heterosis for yield traits in two-line hybrid rice populations
title_fullStr	Genome-wide dissection of heterosis for yield traits in two-line hybrid rice populations
title_full_unstemmed	Genome-wide dissection of heterosis for yield traits in two-line hybrid rice populations
title_sort	genome-wide dissection of heterosis for yield traits in two-line hybrid rice populations
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/e5130bedc6f74e63912ef4e9fe2487c2
work_keys_str_mv	AT gangzhen genomewidedissectionofheterosisforyieldtraitsintwolinehybridricepopulations AT pengqin genomewidedissectionofheterosisforyieldtraitsintwolinehybridricepopulations AT kaiyuliu genomewidedissectionofheterosisforyieldtraitsintwolinehybridricepopulations AT dongyangnie genomewidedissectionofheterosisforyieldtraitsintwolinehybridricepopulations AT yuanzhuyang genomewidedissectionofheterosisforyieldtraitsintwolinehybridricepopulations AT xingwangdeng genomewidedissectionofheterosisforyieldtraitsintwolinehybridricepopulations AT hanghe genomewidedissectionofheterosisforyieldtraitsintwolinehybridricepopulations
_version_	1718388550713475072

Genome-wide dissection of heterosis for yield traits in two-line hybrid rice populations

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