小麦F_1代的产量优势及相关性分析  

Heterosis and Correlation Analysis on Yield Characters of Reciprocal-hybrid Combinations of Wheat

作　　者：周芳菊[1] 陈桥生[1] 张晓波[1] 张道荣[1] 汤清益[1] 王志顺[1] 

机构地区：[1]湖北省襄樊市农业科学院,湖北襄樊441057

出　　处：《农技服务》2009年第10期9-10,共2页AGRICULTURAL TECHNOLOGY SERVICE

基　　金：湖北省农业科技创新中心小麦育种专项(200762042042647001);国家现代农业产业技术体系建设专项(Supported by the earmarked fund for Modern Agro-industry Technology Research System);湖北省"十一五"重大科技攻关小麦育种专项(2006AA201A04)经费资助

摘　　要：通过对106个杂交组合中21个超标优势组合F1代产量性状及相关性分析,发现各超标优势组合的产量三因素均具较高水平。其中,有效穗数对产量的贡献最大,通径系数为0.8536;穗粒数次之,通径系数为0.4355;千粒重贡献较小,通径系数仅为0.2492。由此表明,湖北麦区生态条件下杂交小麦强优势组合的选配应在有效穗数和穗粒数两因子上有所侧重。Yield characterizations of 21 hybrids F1 from 106 hybrid crosses were analyzed with heterosis and correlation. The results showed that there were heterosis in all 21 hybrids,and high-yield hybrids had better cooperation with three yield characterizations （spike kernels,kernels/head and 1 000-kernel-weights）. Among three factors, however, spike kernels was the important contribution to grain yields （path = 0. 853 6）, kernels/head was the second （path = 0. 435 5 ）, but 1 000-kernel-weights was the lowest （path = 0. 249 2 ）. Analysis on significant heterosis crosses showed that,during selecting good cross hybrids,it should be to pay attention to spike kernels and kernels/head on the environmental condition of Hubei Province.

关 键 词：杂交小麦 产量优势 产量因素 相关性分析 

分 类 号：S512[农业科学—作物学]