【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。更多还原

【Abstract】 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.更多还原