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杂交香稻亲本遗传距离与产量杂种优势的相关性研究
引用本文:张涛,韩磊,徐建第,蒋开锋,吴先军,汪旭东,郑家奎.杂交香稻亲本遗传距离与产量杂种优势的相关性研究[J].中国农业科学,2006,39(4):831-835.
作者姓名:张涛  韩磊  徐建第  蒋开锋  吴先军  汪旭东  郑家奎
作者单位:中国农业大学农学与生物技术学院
基金项目:教育部长江学者和创新团队发展计划
摘    要:【目的】研究遗传距离与杂种优势的相关性,为杂交水稻育种提供依据。【方法】利用SSR标记检测R527等恢复系与泸香90A等不育系间的遗传距离,并分析遗传距离与产量杂种优势间的相关性。【结果】杂交香稻亲本间遗传距离与产量性状及其各构成因素杂种优势间的相关系数偏小(-0.257~0.292),均未达显著水平。【结论】所选用的杂交水稻亲本间的遗传距离大小并不能反映杂种优势;所选用的SSR标记不能预测水稻产量杂种优势,利用分子标记遗传距离来预测杂交水稻杂种优势的可靠性有待进一步探讨。

关 键 词:香稻  杂种优势  SSR  遗传距离  相关性
收稿时间:2005-04-07
修稿时间:2005-04-072006-01-20

Correlation Between Genetic Distance and Yield Heterosis of Hybrid Aromatic Rice
ZHANG Tao,HAN Lei,XU Jian-di,JIANG Kai-feng,WU Xian-jun,WANG Xu-dong,ZHENG Jia-kui.Correlation Between Genetic Distance and Yield Heterosis of Hybrid Aromatic Rice[J].Scientia Agricultura Sinica,2006,39(4):831-835.
Authors:ZHANG Tao  HAN Lei  XU Jian-di  JIANG Kai-feng  WU Xian-jun  WANG Xu-dong  ZHENG Jia-kui
Institution:1 Rice and Sorghum Institute, Sichuan Academy of Agricultural Sciences, Luzhou 646000; 2 Rice Research Institute, Sichuan Agricultural University, Wenjiang 611130; 3Key Laboratory of Southwest Crop Genetic Resources and Improvement, Ministry of Education, Sichuan Agricultural University, Yaan, 625014
Abstract:【Objective】 Correlation between genetic distance and heterosis in an important question in hybrid rice breeding. 【Method】 The genetic distance of the aromatic rice parents and the relativity analysis were studied by SSR in this article. 【Result】 The relativity coefficient was partial to small(-0.257-0.292)between SSR genetic distance and heterosis of four yield traits. The correlation between the genetic distance of the aromatic rice parents selected and the yield heterosis was not significant. 【Conclusion】So, SSR markers selected in this study couldn't predict rice heterosis. The research indicated that different or opposite results would be gained with different materials. Thus, the analysis of genetic distance based on molecular markers predicting the yield heterosis need to be studied further.
Keywords:SSR
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