Identification of Grain Number Quantitative Trait Loci with Single Segment Substituted Lines in Rice

doi:10.3969/j.issn.1000-7091.2013.04.005

Abstract

Abstract: Grain number is one of the important components of rice yield which is a typical quantitative trait and can easily be influenced by genetic background and environmental factors．Single segment substitution lines (SSSLs) can effectively reduce the interference of the genetic background．We developed a set of genome- wide SSSLs carrying Nipponbare introgression segments in the background of Guangluai 4．Quantitative trail loci (QTL) analysis involved one- way ANOVA and Dunnett' s test for comparing SSSLs with the recurrent parent Guangluai 4 (P 0．001)．We detected 27 QTLs for grain number distributed on 11 rice chromosomes except chromosome 10，of which 2 had negative effect and the others positive effect．The additive effect of these QTLs ranged from－37．5 to 96．6，with additive effect percentages－29．07% to 88．57%．These results provide useful information for exploring and using new grain number related resources．

Key words: Rice, Grain number, Quantitative trait loci, Single segment substitution lines, Substitution mapping

CLC Number:

ZHU Jin-yan1, YANG Mei, WANG Zhong-de, WANG Jun, ZHOU Yong, YANG Jie, FAN Fang-jun, LI Wen-qi, LIANG Guo-hua, ZHONG Wei-gong. Identification of Grain Number Quantitative Trait Loci with Single Segment Substituted Lines in Rice[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2013, 28(4): 23-30. doi: 10.3969/j.issn.1000-7091.2013.04.005.

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