小麦品种的耐湿性及其主要农艺性状的配合力分析

来源 :中国农业科学 | 被引量 : 0次 | 上传用户:fengaitong1983
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对4个耐湿亲本和3个不耐湿农艺亲本,按双因素交叉式遗传设计(NCⅡ),配制12个组合,以孕穗期湿害为主要研究对象,观察绿色叶片数、株高、每穗粒数、千粒重等主要性状。结果表明:过湿处理后的绿叶片数在组合间存在着极显著差异,表明不同亲本在受渍后的耐湿程度是显著不同的。其绿叶片数的一般配合力的差异达极显著水平,耐湿组亲本中农家品种水里占的一般配合力最好,Pato最差;组合间特殊配合力的差异也达显著水平,以西风/鄂麦6号的特殊配合力最高,Pato/鄂麦6号最低,初步认为耐湿性受加性和非加性效应控制,以加性效应为主。耐湿亲本在株高、主穗粒数和千粒重上的一般配合力的差异达极显著水准,而农艺亲本除株高外,其每穗粒数和千粒重的一般配合力差异不显著。特殊配合力仅在千粒重上有显著差异,表明在农艺性状的遗传中,以加性效应为主。根据一般配合力和特殊配合力效应及方差,评价了耐湿亲本在育种中的利用价值。 Four wet-resistant parents and three non-wettable agronomic parents were divided into two groups according to two-factor crossover genetic design (NCⅡ). The main research object was wet injury at booting stage. The number of green leaves, plant height, Number, 1000-grain weight and other major traits. The results showed that there were extremely significant differences in the number of green leaves after the wet treatment, indicating that the moisture resistance of different parents after the stain was significantly different. The difference of general combining ability of green leaf number reached extremely significant level, the general combining ability of peasant variety in water-resistant group was the best, Pato was the worst; the difference of special combining ability was also significant, Emai 6 had the highest combining ability, while Pato / Emai 6 had the lowest. It was preliminarily believed that the moisture tolerance was controlled by additive and non-additive effects, with additive effect as the main factor. The difference of general combining ability of wet-resistant parents in plant height, main ear number and 1000-grain weight reached extremely significant level. However, the agronomic parents had no significant difference in the general combining ability of grains per spike and 1000-grain weight except the plant height. The special combining ability showed significant difference only in 1000-grain weight, which indicated that in the inheritance of agronomic traits, additive effect was the main factor. According to the general combining ability and special combining ability effect and variance, the utilization value of wet-resistant parents in breeding was evaluated.
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