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Molecular mapping of QTLs for hulled-rice shape using recombinant inbred population

机译：利用重组自交群体对稻壳形QTL进行分子定位

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摘要

The development of molecular genetic maps has accelerated the identification and mapping of genomic regions controlling quantitative trait locus (QTLs). This study was conducted to identify QTLs for shape of hulled-rice grains, using recombinant inbred (RI) lines derived from cross between a japonica variety (Asominori) and an indica variety (IR 24). Continuous distributions of length and width of hulled-rice grains were observed in the RI population. Two QTLs for length in hulled-rice grains weredetected on chromosome 3,10 and explained 24.23 percent and 11.17 percent of the total phenotype variations, respectively. Three QTLs determining the width in hulled-rice grains were located on chromosome 2, 3, 5 and could account for 12.58 percent, 10.86 percent and 25.36 percent of total phenotype variations, respectively. In addition, both alleles for length from indica IR 24 increased their values and all three alleles for width from japonica Asominori increased their values. The identification of economically important QTLs will be useful in breeding for improved grain characteristics.
机译：分子遗传图谱的发展加速了控制数量性状基因座（QTL）的基因组区域的识别和定位。这项研究是利用重组近交系（RI）来鉴定壳稻粒形状的QTL，该重组自交系来自粳稻品种（Asominori）和in稻品种（IR 24）之间的杂交。在RI种群中观察到稻壳米粒长度和宽度的连续分布。在3,10号染色体上检测到两个去壳大米长度的QTL，分别解释了总表型变异的24.23％和11.17％。确定壳米粒宽度的三个QTL位于第2、3、5号染色体上，分别占总表型变异的12.58％，10.86％和25.36％。另外，来自IR IR 24的长度的两个等位基因均增加了其值，而来自粳米Asominori的宽度的三个等位基因均增加了其值。确定具有经济意义的QTL有助于育种以改善谷物特性。

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