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首页> 外文期刊>Euphytica >Molecular marker-assisted selection for yield-enhancing genes in the progeny of “9311×O. rufipogon” using SSR
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Molecular marker-assisted selection for yield-enhancing genes in the progeny of “9311×O. rufipogon” using SSR

机译：“ 9311×O”子代增产基因的分子标记辅助选择。 rufipogon”使用SSR

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摘要

Oryza rufipogon (IRGC105491) is a wild relative of cultivated rice, it contains two favorable yield-enhancing genes (yld1.1 and yld2.1) on chromosomes 1 and 2, respectively, which are capable of improving the yield of hybrid rice by 18 and 17%, respectively. SSR markers RM9, RM24, RM5 and RM306 are flanking yld1.1, while RM166 and RM208 are mapped in the close region to yld2.1. These molecular markers tightly linked to the two yield-enhancing genes were used to screen the plants of backcross population between ‘9311’ (one of the top-performing parental lines in super hybrid rice seed production in China) and O. rufipogon. The results were as follows: (1) in BC2F1 population, the percentage of the individuals which contain both of the O. rufipogon alleles at marker loci RM166 and RM9 was 16.8%; (2) 1.5% individuals of total BC3F1 population have all the six linked markers (RM166, RM9, RM5, RM208, RM24, RM306); (3) in BC4F1 population, the percentage of the individuals which contain both of the two O. rufipogon alleles at marker loci RM166 and RM9 was 18.0%. Based on marker genotypes, the individuals, that contain multiple O. rufipogon markers, were selected and used for further backcross and self cross. Many ‘9311’-type lines with yield-enhancing genes and high yield potential were obtained. After three times self-crossing a stable improved ‘9311’ line was obtained. The results indicated that these molecular markers are feasible for marker-assisted selection (MAS) to screen rice individuals with high yield potential.
机译：Oryza rufipogon（IRGC105491）是栽培稻的野生近缘种，它在1号和2号染色体上分别包含两个有利的增产基因（yld1.1和yld2.1），能够将杂交水稻的产量提高18个和17％。 SSR标记RM9，RM24，RM5和RM306位于yld1.1侧翼，而RM166和RM208则位于yld2.1的近端区域。这些与两个提高产量的基因紧密相关的分子标记被用于筛选“ 9311”（中国超级杂交水稻种子生产中表现最好的亲本之一）和红麦草之间回交种群的植物。结果如下：（1）在BC2 F1 种群中，在标记基因座RM166和RM9上同时含有红景天等位基因的个体百分比为16.8％； （2）BC3 F1 总人口中有1.5％的个体具有全部六个连锁标记（RM166，RM9，RM5，RM208，RM24，RM306）； （3）在BC4 F1 群体中，在标记基因座RM166和RM9上同时含有两个麦冬红豆杉等位基因的个体百分比为18.0％。根据标记的基因型，选择包含多个麦冬麦芽孢杆菌标记的个体，并将其用于进一步的回交和自交。获得了许多具有增产基因和高产潜力的“ 93​​11”型品系。经过三次自交后，获得了稳定的改进“ 9311”线。结果表明，这些分子标记对于标记辅助选择（MAS）筛选具有高产潜力的水稻个体是可行的。

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  • 来源
    《Euphytica》 |2004年第2期|159-165|共7页
  • 作者

    Fengshan Liang; Qiyun Deng; Yueguang Wang; Yuedong Xiong; Demin Jin; Jiming Li; Bin Wang;

  • 作者单位

    Institute of Genetics and Developmental Biology Chinese Academy of SciencesCollege of Agronomy Hebei Agricultural University;

    China National Hybrid Rice Research and Development Center (CNHRRDC);

    Institute of Genetics and Developmental Biology Chinese Academy of Sciences;

    China National Hybrid Rice Research and Development Center (CNHRRDC);

    Institute of Genetics and Developmental Biology Chinese Academy of Sciences;

    China National Hybrid Rice Research and Development Center (CNHRRDC);

    Institute of Genetics and Developmental Biology Chinese Academy of Sciences;

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  • 正文语种 eng
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  • 关键词

    marker-assisted selection (MAS); wild rice; yield-enhancing genes;

    机译：标记辅助选择;野生稻;增产基因;

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