Analysis of Quantitative Trait Loci for Panicle Layer Uniformity in Rice (Oryza sativa L.)

文献类型： 外文期刊

第一作者： Ma, L. Y.

作者： Ma, L. Y.;Xiao, P.;Xia, Y. W.;Bao, J. S.;Ma, L. Y.;Xiao, P.;Xia, Y. W.;Bao, J. S.;Ma, L. Y.;Cai, J.;Li, X. M.;Ji, Z. J.;Yang, C. D.

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关键词： Genetics;Agronomy: Agriculture

期刊名称：CEREAL RESEARCH COMMUNICATIONS （ 影响因子：0.85； 五年影响因子：1.067 ）

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收录情况： SCI

摘要： Uniformity in the height of main stem and tillers is a key factor affecting ideal plant type, a key component in super high-yielding rice breeding. An understanding of the genetic basis of the panicle layer uniformity may thus contribute to breeding varieties with good plant type and high yield. In the present study, a doubled haploid (DH) population, derived from a cross between indica rice variety Zhai-Ye-Qing 8 (ZYQ8) and japonica rice variety Jing-Xi 17 (JX17) was used to analyze quantitative trait loci (QTL) for panicle layer uniformity related traits. Six, four and three QTL were detected for the highest panicle height (HPH), lowest panicle height (LPH) and panicle layer dis-uniformity (PLD), respectively. qHPH-1-1 and qPLD-1 were located at the same interval on chromosome 1. The JX17 allele(s) of these QTL increased HPH and PLD by 2.57 and 1.26 cm, respectively. Similarly, qPLD-7 and qHPH-7 were located at the same interval on chromosome 7, where the ZYQ8 allele( s) increased HPH and PLD by 3.74 and 1.96 cm, respectively. These four QTL were unfavourable for panicle layer uniformity improvement because a decrease of the PLD was accompanied by decrease of the plant height. qPLD-6 and qLPH-6-1 were located at the same interval on chromosome 6, however here the JX17 allele(s) increased LPH, but decreased PLD, suggesting that this QTL was favourable for improvement of panicle layer uniformity. The markers identified in this study are potential for marker assisted breeding for the improvement of the panicle layer uniformity and ideal plant type.

分类号： S5

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