Title: QTL analysis of biomass in rice(Oryza sativa L.) by using backcross recombinant inbred lines(BILs) and chromosome segment substitution lines(CSSLs)
Abstract: Rice yield and economic output are tightly linked to biomass.A mapping population of 98 BC1F10 lines(backcross inbred line: BIL),derived from a backcross of Nipponbare(japonica,low biomass) / Kasalath(indica,high biomass)∥Nipponbare by the single-seed descent methods,was used to detect quantitative trait loci(QTL) for the height of plant,the weight of spike,the weight of stalk,as well as the weight of grain.A total of three,three,one,five QTL controlling the plant height,the spike weight,the stalk weight,and the grain weight,were detected respectively.In order to validate these QTL detected in BIL population,a genome-wide chromosome segment substitution line(CSSL) population(with 54 lines) derived from the cross of Nipponbare(as recurrent parent) and Kasalath(as donor parent) were analyzed.The results revealed that once inserting the segments of donor parent(Kasalath) carrying the corresponding QTL of the plant height,the spike weight,the stalk weight,and the grain weight,compared to Nipponbare,the phenotypes in relevant lines with Kasalath segments were increased significantly,while that of the grain weight,was decreased markedly.Therefore,the QTL controlling the biomass-related traits detected in BIL population really existed.
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
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