Identification of Heterotic Loci with Desirable Allelic Interaction to Increase Yield in Rice

Abstract Heterosis denotes the superiority of a hybrid plant over its parents. The use of heterosis has contributed significantly to yield improvement in crops. However, the genetic and molecular bases on heterosis are not fully understood. A large number of heterotic loci were identified for 12 yie...

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Autores principales: Yin Xiong, Chaopu Zhang, Hongju Zhou, Wenqiang Sun, Peng Wang, Dianwen Wang, Xianjin Qiu, Jauhar Ali, Sibin Yu
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Publicado: SpringerOpen 2021
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spelling oai:doaj.org-article:33a325ad970d459bb2e04328ffbd543a2021-11-28T12:38:09ZIdentification of Heterotic Loci with Desirable Allelic Interaction to Increase Yield in Rice10.1186/s12284-021-00539-z1939-84251939-8433https://doaj.org/article/33a325ad970d459bb2e04328ffbd543a2021-11-01T00:00:00Zhttps://doi.org/10.1186/s12284-021-00539-zhttps://doaj.org/toc/1939-8425https://doaj.org/toc/1939-8433Abstract Heterosis denotes the superiority of a hybrid plant over its parents. The use of heterosis has contributed significantly to yield improvement in crops. However, the genetic and molecular bases on heterosis are not fully understood. A large number of heterotic loci were identified for 12 yield-related traits in one parental population of chromosome segment substitution lines (CSSLs) and two test populations, which were interconnected by CSSLs derived from two rice genome-sequenced cultivars, Nipponbare and Zhenshan 97. Seventy-five heterotic loci were identified in both homozygous background of Zhenshan 97 and heterogeneous background of an elite hybrid cultivar Shanyou 63. Among the detected loci, at least 11 were colocalized in the same regions encompassing previously reported heterosis-associated genes. Furthermore, a heterotic locus Ghd8 NIP for yield advantage was verified using transgenic experiments. Various allelic interaction at Ghd8 exhibited different heterosis levels in hetero-allelic combinations of five near-isogenic lines that contain a particular allele. The significant overdominance effects from some hetero-allelic combinations were found to improve yield heterosis in hybrid cultivars. Our findings support the role of allelic interaction at heterotic loci in the improvement of yield potential, which will be helpful for dissecting the genetic basis of heterosis and provide an optional strategy for the allele replacement in molecular breeding programs in hybrid rice.Yin XiongChaopu ZhangHongju ZhouWenqiang SunPeng WangDianwen WangXianjin QiuJauhar AliSibin YuSpringerOpenarticleHeterotic lociAllelic interactionGrain yieldOverdominanceGhd8RicePlant cultureSB1-1110ENRice, Vol 14, Iss 1, Pp 1-14 (2021)
institution DOAJ
collection DOAJ
language EN
topic Heterotic loci
Allelic interaction
Grain yield
Overdominance
Ghd8
Rice
Plant culture
SB1-1110
spellingShingle Heterotic loci
Allelic interaction
Grain yield
Overdominance
Ghd8
Rice
Plant culture
SB1-1110
Yin Xiong
Chaopu Zhang
Hongju Zhou
Wenqiang Sun
Peng Wang
Dianwen Wang
Xianjin Qiu
Jauhar Ali
Sibin Yu
Identification of Heterotic Loci with Desirable Allelic Interaction to Increase Yield in Rice
description Abstract Heterosis denotes the superiority of a hybrid plant over its parents. The use of heterosis has contributed significantly to yield improvement in crops. However, the genetic and molecular bases on heterosis are not fully understood. A large number of heterotic loci were identified for 12 yield-related traits in one parental population of chromosome segment substitution lines (CSSLs) and two test populations, which were interconnected by CSSLs derived from two rice genome-sequenced cultivars, Nipponbare and Zhenshan 97. Seventy-five heterotic loci were identified in both homozygous background of Zhenshan 97 and heterogeneous background of an elite hybrid cultivar Shanyou 63. Among the detected loci, at least 11 were colocalized in the same regions encompassing previously reported heterosis-associated genes. Furthermore, a heterotic locus Ghd8 NIP for yield advantage was verified using transgenic experiments. Various allelic interaction at Ghd8 exhibited different heterosis levels in hetero-allelic combinations of five near-isogenic lines that contain a particular allele. The significant overdominance effects from some hetero-allelic combinations were found to improve yield heterosis in hybrid cultivars. Our findings support the role of allelic interaction at heterotic loci in the improvement of yield potential, which will be helpful for dissecting the genetic basis of heterosis and provide an optional strategy for the allele replacement in molecular breeding programs in hybrid rice.
format article
author Yin Xiong
Chaopu Zhang
Hongju Zhou
Wenqiang Sun
Peng Wang
Dianwen Wang
Xianjin Qiu
Jauhar Ali
Sibin Yu
author_facet Yin Xiong
Chaopu Zhang
Hongju Zhou
Wenqiang Sun
Peng Wang
Dianwen Wang
Xianjin Qiu
Jauhar Ali
Sibin Yu
author_sort Yin Xiong
title Identification of Heterotic Loci with Desirable Allelic Interaction to Increase Yield in Rice
title_short Identification of Heterotic Loci with Desirable Allelic Interaction to Increase Yield in Rice
title_full Identification of Heterotic Loci with Desirable Allelic Interaction to Increase Yield in Rice
title_fullStr Identification of Heterotic Loci with Desirable Allelic Interaction to Increase Yield in Rice
title_full_unstemmed Identification of Heterotic Loci with Desirable Allelic Interaction to Increase Yield in Rice
title_sort identification of heterotic loci with desirable allelic interaction to increase yield in rice
publisher SpringerOpen
publishDate 2021
url https://doaj.org/article/33a325ad970d459bb2e04328ffbd543a
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