几个杂交粳稻恢复系配合力分析及其利用价值评价

Combining abilities and use values of several hybrid keng rice restorers

以6个不同类型的杂交粳稻恢复系和6个BT型粳稻不育系为亲本,采用不完全双列杂交(NCⅡ)设计,对其杂种一代产量及相关性状的配合力进行分析。结果表明:恢复系的产量性状一般配合力效应为‘繁18’>‘繁16’>‘繁15’>‘申恢C9’>‘申恢254’>‘206’,综合比较其他性状GCA效应,籼粳交偏粳型恢复系‘繁15’、‘繁16’是GCA效应较好的父本。产量及相关性状大多数受恢复系的影响大于不育系,在杂交粳稻新组合测配上,恢复系选择是关键,同时也不能忽视不育系的作用以及双亲的互作效应。籼粳交恢复系具有很强的恢复能力,组合的产量竞争优势表现突出,有很好的利用价值。

Six different-type hybrid keng rice restorers and 6 BT-type keng rice sterile lines were used as parents,and their F1 yields and relative characters＇ combining abilities were analyzed by using incomplete diallel cross design（NC Ⅱ ）. The results showed that the descending order of general combining ability（GCA） for the restorers＇ grain yields was ＇ Fan 18＇ 〉 ＇ Fan 16＇〉 ＇ Fan 15 ＇ 〉 ＇ Shenhui C9＇〉＇Shenhui 254＇〉＇206＇; and considering the GCAs of other characters, ＇Fan 15＇ and ＇Fan 16＇ were better male parents. The yield and its relative characters were affected more by the restorers than by the sterile lines, so selection of restorers was of key importance though the sterile lines＇ effects and both parents＇ interaction could not be overlooked. The restorers of indica-japonica cross had good fer- tility restoration ability, and their combinations had outstanding competitive edge in yield and good use value.