栽培西瓜单果重主基因+多基因遗传分析  

Mixed major gene and polygene inheritance analysis of single fruit weight in watermelon

作　　者：王学征 刘阳萍 陈克农 赵正翔 孙蕾 高忠琦 朱子成 韩文灏 栾非时 WANG Xuezheng;LIU Yangping;CHEN Kenong;ZHAO Zhengxiang;SUN Lei;GAO Zhongqi;ZHU Zicheng;HAN Wenhao;LUAN Feishi(Key Laboratory of Biology and Genetic Improvement Horticultural Crops(Northeast Region),Ministry of Agriculture and Rural Affairs,Harbin 150030,China;School of Horticulture and Landscape Architecture,Northeast Agricultural University,Harbin 150030,China;Graduate College,Northeast Agricultural University,Harbin 150030,China)

机构地区：[1]农业农村部东北地区园艺作物生物学与种质创制重点实验室,哈尔滨150030 [2]东北农业大学园艺园林学院,哈尔滨150030 [3]东北农业大学研究生院,哈尔滨150030

出　　处：《东北农业大学学报》2022年第7期9-15,共7页Journal of Northeast Agricultural University

基　　金：国家自然科学基金项目(31772333);国家西甜瓜产业技术体系项目(CARS-25)。

摘　　要：单果重是西瓜[Citrullus lanatus(Thunb.)Mansf.]重要农艺性状之一,对西瓜产量提升起决定性作用。试验以大果型西瓜品种Medium为父本,小果型西瓜品种COS为母本,构建F_(1)及F_(2)群体,利用植物数量性状主基因+多基因混合遗传模型多世代联合分析法,分析2019~2020两年Medium、COS、F_(1)及F_(2)群体单果重遗传情况。结果表明,栽培西瓜单果重符合A-1(1MG-AD)模型,即单果重由主基因+加性-显性多基因控制,F_(2)群体主基因遗传率为64.4953%,显性效应为0.3802,加性效应为负向。试验结果为西瓜单果重主效基因定位及单果重性状改良提供理论参考。Single fruit weight is one of the important agronomic traits in watermelon[Citrullus Lanatus(Thunb.)Mansf.],which plays a decisive role in the improvement of watermelon yield.In this study,F_(1) and F_(2) populations were constructed with large fruit watermelon variety"Medium"as male parent and small fruit watermelon variety"COS"as female parent.The multi generation combined analysis method of plant quantitative trait major gene+polygene mixed genetic model was used to analyze inheritance of single fruit weight in Medium,COS,F_(1) and F_(2) populations.The results showed that the single fruit weight of watermelon accorded with A-1(1MG-AD)model,it was controlled by main gene additive+dominant polygene.The heritability of F_(2) main gene of single fruit weight was 64.4953%,the dominant effect was 0.3802,and the additive effect was negative.This experiment provides a theoretical reference for the mapping of major gene of single fruit weight and the improvement of single fruit weight traits in watermelon.

关 键 词：西瓜 单果重 遗传分析 主基因+多基因 

分 类 号：S651[农业科学—果树学]