中国农业科学 ›› 2006, Vol. 39 ›› Issue (04): 831-835 .

• 研究简报 • 上一篇    下一篇

杂交香稻亲本遗传距离与产量杂种优势的相关性研究

张涛,韩磊,徐建第,蒋开锋,吴先军,汪旭东,郑家奎   

  1. 中国农业大学农学与生物技术学院
  • 收稿日期:2005-04-07 修回日期:2005-07-22 出版日期:2006-04-10 发布日期:2006-04-10
  • 通讯作者: 张涛

Correlation Between Genetic Distance and Yield Heterosis of Hybrid Aromatic Rice

,,,,,,   

  1. 中国农业大学农学与生物技术学院
  • Received:2005-04-07 Revised:2005-07-22 Online:2006-04-10 Published:2006-04-10

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

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.

Key words: Aromatic rice, Heterosis, SSR, Genetic distance, Correlation