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运用星座图聚类法对两年试验的化杀杂种小麦亲本进行了聚类、计算所得的综合指标值能较客观地反映化杀杂种小麦亲本的综合性状。结合各亲本的综合指标值与星座图将农艺亲本 (及CK)分为几大类群 ,取得了良好效果。研究表明 ,双亲综合指标值之差 (差值 )不能用来预测类群内组合的杂种优势与类群间组合的超标优势 ,但可用来预测类群间组合的平均优势。在类群间组合中 ,当差值较小时 ,可用之来预测类群亲本间的超标优势 (r =0 .751 2 ) ;当差值较大时 ,可用之来预测亲本间的平均优势与超标优势 (r =-0 .7690 与-0 .660 0 ) ,差值与类群间组合的杂种优势近似抛物线关系。研究同时表明 ,化杀杂种小麦强优势组合是在有综合性状好的丰产类农艺亲本存在下 ,与其它各具特色的农艺亲本共同形成的
The constellation map clustering method was used to cluster the hybridized wheat parents of the two years experiment. The calculated comprehensive index values can more objectively reflect the comprehensive characters of the hybridized wheat parents. Combined with the comprehensive index values and constellations of each parent, the agronomic parents (and CK) were divided into several groups, which achieved good results. The results showed that the difference (difference) between the parents' comprehensive index values can not be used to predict the heterosis and the superiority of the inter-group combinations, but it can be used to predict the average superiority of the inter-group combinations. In the inter-group combination, when the difference is small, it can be used to predict the out-of-class advantage among the parents (r = 0.751 2); when the difference is large, the average and the out- (r = -0.7690 and -0.660 0), and the parabola relationship between the difference and the heterosis of the inter-cluster combinations. At the same time, the study also showed that the combination of strong heterosis of hybrid wheat was formed in the presence of a good yielding agronomic parents with good comprehensive characters and with other characteristic agronomic parents