茄子果形遗传研究  

Study on Inheritance of Eggplant Fruit Shape

作　　者：乔军[1] 刘富中[1] 陈钰辉[1] 连勇[1] 

机构地区：[1]中国农业科学院蔬菜花卉研究所,北京100081

出　　处：《园艺学报》2011年第11期2121-2130,共10页Acta Horticulturae Sinica

基　　金：国家科技支撑计划项目(2009BADB8B01);科技部国际科技合作项目(2010DFA32350);农业部园艺作物遗传改良重点开放实验室资助项目

摘　　要：以果形差异显著的3个茄子高代自交系106(扁圆)、114(短筒)和111(长筒)为试验材料,用人工和计算机图像测定相结合获得果形指数和三角果形指数,通过P1、P2、F1、B1、B2和F2世代联合分析,研究茄子果形性状遗传规律。结果表明:组合Ⅰ(106×114)和组合Ⅱ(114×111)果形分离群体的果形指数以及组合Ⅰ分离群体的三角果形指数均呈单峰偏态分布,说明茄子果形属于数量性状,存在主基因效应;茄子果形性状符合D-2遗传模型,即符合一对加性主基因+加性—显性多基因模型;主基因遗传力以F2代最高,多基因遗传力以B2代最高。茄子果形性状遗传总体表现出多基因遗传特征,果形选择效率在F2代中最高。In this study,three self-crossed eggplant lines that vary significantly in fruit shape 106 （Oblate）,114（Short barrel）and 111（Long tube）were used as materials. Artificial measurement and computer photograph analysis were used to obtain fruit shape index and fruit shape triangle index. The inheritance of fruit shape was investigated by a joint segregation analysis of P1,P2,F1,B1,B2 and F2 generations. The results showed that fruit shape index in F2 segregation population of two hybrid crosses （106 × 114,114 × 111）and fruit shape triangle index in F2 segregation population of hybrid crossⅠfit single peak skewed distribution. The results proved that fruit shape trait is quantitative trait and it was controlled by main genes. The inheritance of eggplant fruit shape fit one additive major gene ＋ additive-dominant polygene model（D-2 model）. The highest major gene heritability was in F2 population and the highest polygene heritability was in B2 population. In summary,eggplant fruit shape trait was controled by polygenes,the highest fruit shape selection efficiency was in F2.

关 键 词：茄子 果形 遗传 数量性状 

分 类 号：S641.1[农业科学—蔬菜学]