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首页> 外文期刊>Chinese science bulletin >Study on heterosis of inter-subspecies between indica and japonica rice (Oryza sativa L.) using chromosome segment substitution lines
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Study on heterosis of inter-subspecies between indica and japonica rice (Oryza sativa L.) using chromosome segment substitution lines

机译：利用染色体片段代换系研究in稻与粳稻亚种间的杂种优势

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摘要

Heterosis for yield and its component traits between chromosome segments from IR24, an indica variety, and the counterparts from 02428, ajaponica rice, was investigated by using a hybrid FI population composed of 63 combinations between 02428 and IR24 chromosome segment substitution lines (CSSLs) with the genetic background of Asominori, ajaponica variety. Significant differences in faeterosis for yield and yield-component traits were observed among the crosses. Analysis of graphical genotyping showed that 14 substituted segments were responsible for yield heterosis. All of them were from all the 12 chromosomes of IR24 except chromosomes 8 and 10. Six segments at the intervals of RFLP markers, such as X132-G1340--R459, X48-= C393A, R288-R1854 R2918-X52, X257-C1350 and R367 -X189-2-X24-2 on chromosomes 2, 3, 4, 11 and 12 respectively, had very significant heterosis for yield at the level of P <=0.005 based on West, individually increasing the hybrid yield by more than 35 percent compared with the control cross "Asominorix02428". Most of IR24 chromosome segments were found to have no significant hybrid effect for yield and yield-component traits, and one segment located at R2171 on chromosome 6 possessed significant negative effect with 27 percent of yield decrease. Advantages of using CSSLs in the heterosis studies were discussed and approaches of the partial and genome-wide exploitation of rice heterosis between indica and japonica by molecular marker-assisted selection were then proposed.
机译：通过使用由02428和IR24染色体片段替换系（CSSL）之间的63个组合组成的杂种FI群体，研究了in稻IR24的染色体片段与02428粳稻对应片段之间的产量及其组成特征的杂种优势。粳稻品种Asominori的遗传背景。在杂交之间，在产量和产量构成性状上存在明显的杆状病差异。图形基因分型的分析表明，14个取代的片段负责产量杂种优势。它们全部来自IR24的所有12条染色体，除了8号和10号染色体。以RFLP标记间隔的六个片段，例如X132-G1340--R459，X48- = C393A，R288-R1854 R2918-X52，X257-C1350分别在2、3、4、11和12号染色体上的R367和R367 -X189-2-X24-2在West的P <= 0.005水平上具有非常显着的产量杂种优势，使杂交产量分别增加了35以上与对照十字“ Asominorix02428”相比，百分比。发现大多数IR24染色体区段对产量和产量构成特征没有明显的杂种效应，而位于6号染色体上R2171的一个区段具有显着的负效应，产量降低27％。讨论了在杂种优势研究中使用CSSLs的优势，并提出了通过分子标记辅助选择对and稻和粳稻之间的杂种优势进行部分和全基因组开发的方法。

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