河南烤烟重要亲本间产量的杂种优势和配合力研究

Heterosis and Combinging Ability of Yield among Key Parental Materials of Flue-cured Tobacco in Henan Province

为了研究烤烟的产量遗传特性,以7个重要烤烟亲本及其组配的42个杂交组合为材料,分析烤烟亲本间产量的杂种优势及其配合力,探讨高优势组合的遗传基础。结果表明:7个亲本间存在超亲优势,平均19.2%,组合间差异较大,变幅为-7.3%～65.6%。664-01、秦烟96与其他亲本表现较强的一般配合力,是优秀的亲本材料;从42个组合中优选出高产优势组合中烟100×秦烟96,超亲率达65.6%。高优势组合的亲本产量配合力特点是亲本具有较高的产量表现,且双亲至少有一个具有较高的一般配合力,二亲本间具有较高的特殊配合力。

In order to study the yield genetic characteristics of flue-cured tobacco, heterosis and combining ability were determined using seven key parental materials in this paper, as well as their 42 F1 diallel crosses,and relationships between F1 performance and its pedigree were investigated. The results showed that there were heterobeltiosis in yield among parents with the average value of 19.2% ,and a large difference ranged from --7.3% to 65.6% among hybridized combina- tions. We screened combinations and found Zhongyan 100 X Qinyan 96 had the heterobeltiosis in yield of 65.6~. Among these parents used above,Qinyan 96 and 664-01 were elite. Heterosis of pods per plant and seeds per plant were relatively in accord with yield heterosis. And yield heterosis in parents was related to general combining ability （GCA） and specific combining ability （SCA）. It was determined that at least one of parents had high GCA and both parents had high SCA in high-yield combinations.