Mapping of QTL Associated with Grain Shape Traits in Nipponbare/R1126 Recombinant Inbred Lines Population of Rice

doi:10.7668/hbnxb.2016.01.015

Abstract

Abstract: In order to clarify the genetic mechanism of grain shape traits for large panicle indica rice line,R1126,a set of recombinant inbred lines,which contain 185 lines,was developed by using R1126 crossed to the japonica rice line,Nipponbare.By measuring the grain shape traits include grain length (GL),grain width (GW) and grain thickness (GT) in two years field experiment,combining with the genetic map constructed with SSR and SFP molecular markers,QTL associated with grain shape traits were analyzed.Total ten QTL associated with GL,GW and GT,were detected in two years experiment.Among them,three QTL related to GL including qGL3-1, qGL3-2 and qGL9,and two QTL related to GW including qGW5 and qGW2,were be detected repeatedly in two years,respectively.However,no one QTL related to GT could be detected repeatedly.By comparing the molecular marker information, qGL3-2, qGW2 and qGW5 might be allele with the reported genes of GS3, GW2 and GW5,respectively.The two QTL associated with grain length, qGL3-1 and qGL9,which were expressed stably and repeated in two years experiment,exhibiting the additive effect of increasing the grain length of 0.2 mm,could be used for improving rice appearance quality.

Key words: Rice, Grain length, Grain width, Grain thickness, QTL mapping

CLC Number:

S511.03

YE Naizhong, ZENG Gai, TANG Wei, XIAO Yinghui. Mapping of QTL Associated with Grain Shape Traits in Nipponbare/R1126 Recombinant Inbred Lines Population of Rice[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2016, 31(1): 90-95. doi: 10.7668/hbnxb.2016.01.015.

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