期刊论文

中文

安徽农业科学

0517-6611

2008

36

1

169-172

10.13989/j.cnki.0517-6611.2008.01.064

湖南省自然科学基金（05JJ40037）

本校为其他机构

为了提高两系杂交稻亚种间杂种优势利用的预见性，以5个两用核不育系和9个籼粳程度不同的重组自交系为材料，研究了亲本籼粳特性与杂种优势的关系。结果表明，F1杂种产量优势与亲本籼粳特性之间以第1～2稳节长鉴定的籼粳特性较好地表现出籼粳差异与产量优势的关系，父本籼粳特性是以籼性越强的杂种优势越大，母本则以粳性越强的杂种优势越大；粳性的增强是有利于每穗实粒数、有效穗数、结实率和千粒重优势的提高，而籼性的增强是有利于每穗总粒数和着粒密度优势的提高：籼粳亚种杂种优势的利用应以培育粳型亲籼系不育系和优良的籼型恢复系（父本系），采用粳母籼父配组方式的利用途径。

In order to enhance the foresightedness of the heterosis utilization in two-line hybrid rice subspecies, with 5 dual-purpose genic male sterile lines and 9 recombinant inbred lines with different indica-japonica degrees as materials, the correlation between parental indica-japonica characteristics and heterosis was studied, The results showed that the indica-japonica characteristics identified with the 1st - 2nd ear-node lengths of hybrid F1 showed the correlation between indica-japonica difference and yield heterosis better. The stronger the i...