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烤烟品种间杂种优势及其配合力研究
曾慕衡1, 马守才1, 刘景春1
西北农业大学 农学系
摘要:
对5个烤烟品种采用部分双列杂交,得到10个杂交组合,并对组合的叶部性状进行了杂种优势的表现、配合力和遗传力估算与分析。结果表明:多数组合叶产量性状表现出平均优势,属于双亲中间型。组合(1),(4)和(5)表现出较强的超亲优势。叶产量平均优势表现3种类型。一般配合力和特殊配合力效应值较高的亲本品种有NC89,SC72。遗传性较稳定的亲本品种是NC82和NC89。叶长、叶宽和叶产量的广义遗传力较高,均可在早期选择。叶产量和叶宽的狭义遗传力显著高于叶长,早期选择的可靠性较高。
关键词:  烤烟品种,杂种优势,配合力
DOI:
分类号:S572.035.1
基金项目:
The Heterosis and Combining Ability of Varieties in Tobacco
Zeng Muheng Ma Shoucai Liu Jingchun
Abstract:
Ten cross combinations are obtained using the diallel crossing to five varieties of tobacco ,whose heterosis and combining ability as well as heritability to leaf characteristics are estimated and analysed.The results indicated that the leaf yields of most combinations appeared to have mean heterosis,falling into the middle type of two parents.The combinations(1),(4)and(5)exhibited greater heterosis than the parents.The mean heterosis of leaf yield manifested three type Greater effect estimation of general and special combining ability in parents were NC89 and SC72.The varieties of better hereditary stability were NC82 and NC89.The length and width as well as yield of leaf can be selected in early stage because of greater heritability in a broad sense.The yield and width of leaf can be selected in early stage better than the leangth of leaf because of greater heritability in a narrow sense.
Key words:  tobacco varieties ,heterosis ,combining ability