瓠瓜果实形状的主基因+多基因遗传分析  

Genetic Analysis of Bottle Gourd Fruit Shape by Mixture Model of Major Genes and Polygenes

作　　者：胡胜平 霍雨来 黄诗诗 张永楠 沈慕洁 赵荣茺 于文进[1] 阳燕娟[1] Hu Shengping;Huo Yulai;Huang Shishi;Zhang Yongnan;Shen Mujie;Zhao Rongchong;Yu Wenjin;Yang Yanjuan(College of Agriculture,Guangxi University,Nanning,530004)

机构地区：[1]广西大学农学院,南宁530004

出　　处：《分子植物育种》2022年第13期4407-4415,共9页Molecular Plant Breeding

基　　金：广西创新驱动发展专项重大项目(桂科AA17204026-1,桂科AA17204039-2)资助。

摘　　要：为研究瓠瓜果形的遗传规律,本研究以瓠瓜梨形果自交系(H07)为母本,扁圆形果自交系(H14A)为父本,构建六世代(P_(1),P_(2),F_(1),F_(2),BC_(1)P_(1),BC_(1)P_(2))群体,对瓠瓜果实横径、纵径及果形数进行主基因+多基因遗传分析。结果表明,瓠瓜的果实纵径与果形指数具有极显著相关性,三个性状均呈偏态向右分布;果实纵径和果形指数最适遗传模型为MX2-ADI-ADI,受2对加性-显性-上位性主基因+加性-显性-上位性多基因控制,主基因遗传率分别为77.3603%和85.7756%;果实横径最适遗传模型为MX2-ADI-AD,受2对加性-显性-上位性主基因+加性-显性多基因控制,主基因遗传率为51.0076%。以上结果为深入研究瓠瓜果形遗传机制及定位提供依据。To study the genetic law of bottle gourd fruit shape,in this study,six generations(P_(1),P_(2),F_(1),F_(2),BC_(1)P_(1),BC_(1)P_(2))genetic populations were constructed with the pear-shaped bottle gourd H07 and circular bottle gourd H14A,the major gene+polygene genetic analysis was used for fruit transverse diameter,longitudinal diameter and fruit shape index.The results showed that there was a significant correlation with fruit longitudinal diameter and fruit shape index of bottle gourd,three traits showed a skewed rightward distribution.The optimal genetic model of longitudinal diameter and transverse diameter were MX2-ADI-ADI,which were controlled by two additive-dominant-epistatic major genes+additive-dominant-epistatic polygenes.The heritability rates of the major genes were 77.3603%and 85.7756%.The optimal genetic model of transverse diameter was MX2-ADI-AD,which was controlled by two additive-dominant-epistatic major genes+additive-dominant polygenes,the heritability rates of the major genes was 51.0076%.The results provided basis for further study on genetic mechanism and localization of fruit shape in bottle gourd.

关 键 词：瓠瓜 果实形状 主基因+多基因 遗传分析 

分 类 号：S642.9[农业科学—蔬菜学]