遗传 ›› 2009, Vol. 31 ›› Issue (8): 849-854.doi: 10.3724/SP.J.1005.2009.00849

• 研究报告 • 上一篇    下一篇

杂交稻特殊配合力与杂种优势、亲本间遗传距离的相 关性

倪先林1, 2;张涛1,3;蒋开锋1,3;杨莉1,3;杨乾华1;曹应江1;文春阳2;郑家奎1,2,3   

  1. 1. 四川省农科院水稻高粱研究所, 德阳 618000;
    2. 重庆大学生物工程学院, 重庆 400044;
    3. 国家水稻改良中心四川泸州分中心, 泸州 646100
  • 收稿日期:2008-12-29 修回日期:2009-04-09 出版日期:2009-08-10 发布日期:2009-08-10
  • 通讯作者: 郑家奎

Correlations between specific combining ability, heterosis and genetic distance in hybrid rice

NI Xian-Lin1, 2;ZHANG Tao1, 3;JIANG Kai-Feng1, 3;YANG Li1, 3;YANG Qian-Hua1, 3;CAO YING-Jiang1;WEN Chun-Yang2;ZHENG Jia-Kui1, 2,3
  

  1. 1. Institute of Rice and Sorghum, Sichuan Academy of Agricultural Sciences, Deyang 618000, China;
    2. College of Bioengineering, Chongqing University, Chongqing 400044, China;
    3. Luzhou Branch of National Rice Improvement Center, Luzhou 646100, China
  • Received:2008-12-29 Revised:2009-04-09 Online:2009-08-10 Published:2009-08-10
  • Contact: ZHENG Jia-Kui1

摘要: 杂交水稻育种的实质是配合力育种, 筛选高特殊配合力的杂交水稻组合才能选育出在生产上有实用价值的强优势组合。文章利用SSR标记检测了9个三系杂交稻亲本(5个不育系和4个恢复系)之间的遗传距离, 结合20个杂交稻组合(5×4 NCII)的产量表现, 分析了杂交水稻特殊配合力(Special combining ability, SCA)效应与产量杂种优势、亲本间遗传距离的相关性。结果表明, 特殊配合力效应与对照优势(相关系数r1=0.5609)、平均优势(相关系数r2=0.541)之间均呈显著正相关, 而与亲本遗传距离之间相关不显著, 相关系数(r=0.2143)较小。说明本研究所配组合的特殊配合力效应能充分反映杂种优势, 选用的杂交亲本能组配出强优势组合; 而杂交亲本遗传距离的大小并不能反映特殊配合力效应, 分子标记遗传距离与特殊配合力的相关性还有待于进一步的探讨。

关键词: 水稻, 特殊配合力, 遗传距离, 杂种优势, 相关性

Abstract: Hybrid rice breeding is the combining ability breeding. Screening hybrid rice combinations with high special combining ability (SCA) is able to breed strong superiority combinations with practical values. In this study, the genetic distances (GD) of nine three-line hybrid rice (5 CMS lines and 4 restorer lines) were examined using SSR markers. Based on yield performances of 20 hybrid crosses (5×4 NCII), the relationships between SCA, heterosis and GD were studied. The correlations of yield SCA with the control heterosis (r1=0.5609) and the average heterosis (r2=0.541) were significant, but not significant with GD (r=0.2143). Thus, the heterosis can be reflected by SCA; the hybrid parents selected in this study can be used to develop strong superiority combinations; but the SCA cannot be reflected by GD, which needs further study.

Key words: rice, specific combining ability, genetic distance, heterosis, correlation