Mapping of QTLs for Awn Character Using Chromosome Single Segment Substitution Lines in Rice

doi:10.3969/j.issn.1000-7091.2013.03.002

Abstract

Abstract: Awn character in rice relating with domestication is a typical quantitative trait which is liable to be influenced by genetic backgrounds and environments. As a novel research material,chromosome single segment substitution lines are useful in QTL identification because of diminishing the interference of genetic backgrounds among plants. In this study 15 QTLs for awn character were identified using 119 rice chromosome single segment substitution lines derived from Nipponbare as donor parent in the background of Guangluai 4 in 2011 and 2012. A total of 15 QTLs for awn character distributed on 9 chromosomes except chromosome 1,10 and 12 by substitution mapping with maximum 3 QTLs on chromosome 3 .Of these 15 QTLs,qAN4-1 had the largest effect with 4.7 em mean awn in the two years ,while qANl l-2 had the smallest effect with 0.7 em mean awn in the two years. These results provided important basis for the QTLs cloning and molecular breeding of rice.

Key words: Rice, Chromosome single segment substitution lines Quantitative trait loci, Awn character, Substitutron mapping

CLC Number:

Wang Jun, Zhu Jinyan, Zhou Yong, Yang Jie, Fan Fangjun, Li Wenqi, Liang Guohua, Zhong Weigong. Mapping of QTLs for Awn Character Using Chromosome Single Segment Substitution Lines in Rice[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2013, 28(3): 7-11. doi: 10.3969/j.issn.1000-7091.2013.03.002.

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