Identification of quantitative trait loci for grain appearance and milling quality using a doubled-haploid rice population
Identification of quantitative trait loci for grain appearance and milling quality using a doubled-haploid rice population
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DOI：
10.1111/j.1744-7909.2005.00089.x
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发表时间：
2005-11-01
影响因子：
11.4
通讯作者：
He, YQ
中科院分区：
文献类型：
--
作者：
Jiang, GH;Hong, XY;He, YQ
提高粮食品质，主要是由粮食的外观及其蒸煮和碾磨特性组成，是中国许多水稻产区的主要目标。本研究利用籼稻自交系真山97与粳稻自交系乌玉粳2号杂交的双单倍体群体，对水稻籽粒外观和碾磨品质进行了标记遗传分析。采用混合线性模型方法进行数量性状位点分析，结果表明所研究的性状受到1 ~ 7个QTL的影响，单个QTL解释了4.0% ~ 30.7%的表型变异。累积起来，每个性状的QTL解释了12.9%至61.4%的表型变异。一些qtl倾向于具有多效性或位置连锁关联，这是不同性状之间观察到的表型相关性的原因。利用标记辅助选择对不同的qtl进行重组，有望改善籽粒外观和籽粒重的性状，并改善稻米的碾磨品质。
Improving grain quality, which is composed primarily of the appearance of the grain and its cooking and milling attributes, is a major objective of many rice-producing areas in China. In the present study, we conducted a marker-based genetic analysis of the appearance and milling quality of rice (Oryza sativa L.) grains using a doubled-haploid population derived from a cross between the indica inbred Zhenshan 97 strain and the japonica inbred Wuyujing 2 strain. Quantitative trait locus (QTL) analysis using a mixed linear model approach revealed that the traits investigated were affected by one to seven QTLs that individually explained 4.0%-30.7% of the phenotypic variation. Cumulatively, the QTL for each trait explained from 12.9% to 61.4% of the phenotypic variation. Some QTLs tended to have a pleiotropic or location-linked association as a cause of the observed phenotypic correlations between different traits. Improvement of the characteristics of grain appearance and grain weight, as well as an improvement in the milling quality of rice grains, would be expected by a recombination of different QTLs using marker-assisted selection.