摘要
采用双列杂交法分析水稻杂种优势.用杂交水稻研究中具有代表性的8个品种,按所有可能成对杂交,对配成的28个组合进行田间重复试验,评估产量及其构成因子等性状.结果表明,所考察6个农艺性状在各组合间总体平均数差异显著;6个农艺性状一般配合力方差和特殊配合力方差达到极显著水平,即表明所研究性状同时受加性效应和非加性效应控制;从8个亲本6个农艺性状的一般配合力效应值(gi)分析可得出,同一亲本不同性状其gi值不同,同一性状gi值在不同亲本间亦有很大差别;从28个组合的特殊配合力效应(Sij)可得出,特殊配合力在同一组合不同性状间以及同一性状不同组合间存在显著差异.一般配合力与特殊配合力在多数组合中表现一致,但也有例外,是由于双亲杂交具有很强的非加性效应所致.在产量构成要素中,单株实粒数表现为最高杂种优势,其次是有效穗数,而千粒重优势最小.
The dialel cross method was applied to analyze rice heterosis.The field experiment with replacement was conducted with twenty-eight combinations which were crossed with eight typical varieties according to single cross.Their yields,yield constituates and other characters were estimated.The results show that population means of six agronomic and economic characters were significant different,variances of general and special combining ability were very signifcant.In other word,the traits of studying were controlled by additivity effect and unaddivity effect; GCA effect values of six characters were analysed from eight varieties,its results were different among different characters and parents.Furthermore SCA effect values of twenty-eigth combinations were significant different.GCA and SCA did accord with in the majority of combinations.In addition,there was larger unadditivity effect from biparental crossing heterosis among yield constituents,filled grains per plant is the best ,the next is effective panicles and 1 000-grain weigth is the lowest.
出处
《信阳师范学院学报（自然科学版）》
CAS
2004年第3期291-295,共5页
Journal of Xinyang Normal University(Natural Science Edition)
关键词
水稻
杂种优势
一般配合力
特殊配合力
rice
heterosis
gereral combining ability
special combining ability
