烤烟类胡萝卜素降解产物的配合力分析

摘要

In order to study the genetic characteristics of flue-cured tobacco,5 flue-cured tobacco varieties (lines) were used as materials,and the Griffing hybrids were combined with 10 groups.The total carotenoids degradation products of flue-cured tobacco the combining ability of 3 substances,beta demascenone,giant bean three ketene,and farnesyl acetone,and the genetic parameters were analyzed.The results showed that the genetic characteristics of the carotenoid degradation products were mainly controlled by non-additive effects.664-01 and Yunyan 87 had not only a higher content of carotenoid degradation products,but also a high general combining ability (GCA) value,which was the 2 excellent parents to cultivate high aroma varieties.T NC 89 × 664-01,Zhongyan 100 × Yunyan 87,Qinyan 96 × Yunyan 87 had a high specific combining ability (SCA) effect value,which had important application value in improving the breeding practice of the breeding objectives of aroma.The genetic determinant of traits was high,which indicated that the reliability of selection by phenotype was high.%以5个烤烟品种(系)为材料,按GriffingⅡ组配10个杂交组合,对烤烟的类胡萝卜素降解产物总量和β-大马酮、巨豆三烯酮、法尼基丙酮3种物质的配合力表现及其遗传参数进行了分析.结果表明,类胡萝卜素降解产物的遗传特性主要受基因非加性效应控制.664-01和云烟87自身有较高的类胡萝卜素降解产物含量,又具有较高的一般配合力(GCA)值,是培育高香气品种的2个优良亲本;组合NC 89×664-01、中烟100×云烟87、秦烟96×云烟87具有较高的特殊配合力(SCA)效应值,在以提高香气为育种目标的育种实践中有重要的利用价值.性状的遗传决定度较高,说明通过表现型进行选择的可靠性很高.