茄子果形性状的主基因+多基因混合模型遗传分析  

Analysis on Mixed Major Gene and Polygene Inheritance of Fruit Morphological Traits in Eggplant

作　　者：乐素菊[1] 汪文毅[2] 邵光金[2] 汪国平[2] 

机构地区：[1]仲恺农业工程学院生命科学学院,广东广州510225 [2]华南农业大学园艺学院,广东广州510642

出　　处：《华南农业大学学报》2011年第3期27-31,共5页Journal of South China Agricultural University

基　　金：科技部国际合作项目(2010DFA32190);广东省科技厅国际合作项目(2009B050100001);广州市科技支撑计划项目(2010Z1-E381)

摘　　要：以椭圆形茄‘湖南小圆茄’和南方紫长茄‘海南紫茄’为亲本建立4世代联合群体(P1、P2、F1、F2),采用植物数量性状主基因+多基因混合遗传模型对果形性状进行分析.结果表明:果长、果径、果形指数性状的最优模型分别为E_1(2对加性-显性-上位性主基因+加性-显性多基因)、E_4(2对等加性主基因+加性-显性多基因)、E_6(2对等显性主基因+加性-显性多基因).3个性状的主基因遗传率分别为89.0%、58.8%、78.4%,多基因遗传率分别为2.7%、4.7%、8.3%.因此,育种中既要重视利用主基因,也要考虑多基因对性状的影响;对果长、果形指数的选择可以在育种早期进行.A joint analysis of four generations（P1,P2,F1 and F2）from a cross between the landrace ＇Hunan Xiaoyuanqie＇ with elliptic small fruits and the landrace ＇Hainan Ziqie＇ with club-shaped fruits were performed using the mode of major gene and polygene mixed inheritance of quantitative traits.The result showed that the best genetic models for fruit length,fruit diameter and fruit shape index（length/diameter ratio） were E_1（the model for mixed two-major-gene with additive-dominant-epistatic effect plus polygene with additive-dominant effect）,E_4（the model for mixed two-major-gene with equal additive effect plus polygene with additive-dominant effect）and E_6（the model for mixed two-major-gene with equal dominant effect plus polygene with additive-dominant effect）respectively.The heritabilities of major genes for above three traits were 89.0%,58.8% and 78.4% respectively and their heritabilities of polygenes were 2.7%,4.7% and 8.3% respectively.These results suggest that the breeding for fruit morphology should pay attention to both major genes and polygenes and the selection for fruit length and fruit shape could be carried out at the early stage of breeding procedure.

关 键 词：茄子 果形性状 遗传分析 

分 类 号：S641.1[农业科学—蔬菜学]