西葫芦株型性状主基因-多基因混合遗传分析  

Analysis on Major Gene and Polygene Mixed Inheritance of Plant Type Traits in Summer Squash

作　　者：陈凤真[1] 何启伟[2] 

机构地区：[1]菏泽学院园林工程系,山东菏泽274000 [2]山东省农业科学院蔬菜研究所,山东济南250100

出　　处：《中国蔬菜》2010年第22期34-40,共7页China Vegetables

基　　金：济南市2006年科学技术发展计划项目(064034)

摘　　要：选用蔓生和矮生的西葫芦自交系配制q-1×23-4G(组合1)和q-1×A-7(组合2)2个组合,构建P1、F1、P2、B1、B2和F26个家系世代群体,应用植物数量性状主基因-多基因混合遗传模型对6个世代群体株型性状进行多世代联合分析。结果表明:2个组合的西葫芦株高与叶片数性状遗传均为加性-显性-上位性两对主基因(B-1)遗传模型;2个组合的株高以基因的加性效应为主,而叶片数以加性和显性效应为主;F2的主基因遗传率较高,环境影响相对较小,表明西葫芦株型育种宜早代选择;对西葫芦株型性状的遗传改良,可选择株型紧凑的亲本材料,通过杂交、回交转移主基因,选育株型紧凑的材料。Inheritance of plant type traits of summer squash（Cucurbita pepo L.）in P1, P2, F1, B1, B2 and F2 from two crosses q-1×23-4G（cross 1）and q-1×A-7（cross 2）was investigated by major gene and polygene mixed inheritance model of quantitative traits. The results showed that the plant type traits were both controlled by B-1 model; genetic effect of plant height of two crosses were mainly additive effect, but genetic effect of leaf number of two crosses were mainly additive effect and dominant effect. Heritability values of the major genes of F2 were relatively high and environmental effect was relatively low. These results indicated that plant type traits breeding of summer squash should be selected in early generation and the conventional cross breeding would be more effective for the improvement of plant type traits in summer squash.

关 键 词：西葫芦 株高 叶片数 主基因-多基因 

分 类 号：S642.6[农业科学—蔬菜学]