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Dissecting a heterotic gene through GradedPool-Seq mapping informs a rice-improvement strategy.

著者 Wang C , Tang S , Zhan Q , Hou Q , Zhao Y , Zhao Q , Feng Q , Zhou C , Lyu D , Cui L , Li Y , Miao J , Zhu C , Lu Y , Wang Y , Wang Z , Zhu J , Shangguan Y , Gong J , Yang S , Wang W , Zhang J , Xie H , Huang X , Han B
Nat Commun.2019 Jul 05 ; 10(1):2982.
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Hybrid rice breeding for exploiting hybrid vigor, heterosis, has greatly increased grain yield. However, the heterosis-related genes associated with rice grain production remain largely unknown, partly because comprehensive mapping of heterosis-related traits is still labor-intensive and time-consuming. Here, we present a quantitative trait locus (QTL) mapping method, GradedPool-Seq, for rapidly mapping QTLs by whole-genome sequencing of graded-pool samples from F progeny via bulked-segregant analysis. We implement this method and map-based cloning to dissect the heterotic QTL GW3p6 from the female line. We then generate the near isogenic line NIL-FH676::GW3p6 by introgressing the GW3p6 allele from the female line Guangzhan63-4S into the male inbred line Fuhui676. The NIL-FH676::GW3p6 exhibits grain yield highly increased compared to Fuhui676. This study demonstrates that it may be possible to achieve a high level of grain production in inbred rice lines without the need to construct hybrids.
PMID: 31278256 [PubMed - in process]
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