辣椒单株结果数性状的主基因+多基因遗传分析  

Genetic Analysis on Pepper(Capsicum annuum L.)Fruit Number Per Plant by Mixture Model of Major Gene Plus Polygene

作　　者：王俊涛 冯鹏龙 王亚艺[1] 李全辉[1,3] WANG Juntao;FENG Penglong;WANG Yayi;LI Quanhui(Academy of Agriculture and Forestry,Qinghai University/Qinghai Key Laboratory of Vegetable Genetics and Physiology,Xining 810016,China;State Key Laboratory of Plateau Ecology and Agriculture,Qinghai University,Xining 810016,China;College of Horticulture,Northwest A&F University,Yangling Shaanxi 712100,China)

机构地区：[1]青海大学农林科学院/青海省蔬菜遗传与生理重点实验室,西宁810016 [2]青海大学三江源生态和高原农牧业国重点实验室,西宁8100163 [3]西北农林科技大学园艺学院,陕西杨凌712100

出　　处：《西北农业学报》2022年第11期1443-1450,共8页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：国家自然科学基金(31860556);青海省农林科学院创新基金项目(2019-NKY-03);青海省科技计划项目(2021-ZJ-763);青海省科技厅重点实验室项目(2020-ZJ-Y02)。

摘　　要：为探究辣椒单株结果数的遗传机制,以单株结果数差异较大的辣椒材料XHB(P_(1))和B14-01(P_(2))为亲本,构建四世代遗传家系即P_(1)、P_(2)、F_(1)、F_(2)。运用主基因+多基因多世代联合分析法,研究辣椒单株结果数的遗传规律。结果表明:辣椒单株结果数符合2对加性-显性-上位性主基因模型(2MG-ADI)。2对主基因的加性效应值d a、d b分别为-16.33、-13.05,2对主基因的显性效应值h a、h b分别为-10.02、-2.51。2对主基因间的加性×显性(j_(ab))互作效应和显性×加性(j ba)互作效应的效应值分别为8.69和12.93,加性×加性上位性(i)互作效应值为6.86,显性×显性(l)的互作效应值为7.23,主基因间的效应以加性效应为主,其次是加性×显性上位性互作效应。主基因遗传率为68.10%,环境引起的变异占比31.9%,表明环境对辣椒结果数的影响相对较小。相关研究结果为不同单株结果数辣椒新品种的选育及相关基因的定位等研究奠定了基础。In order to explore the genetic mechanism of pepper fruit number per plant,XHB(P_(1))and B14-01(P_(2))which have significant differences in fruit number per plant were used as parents to construct four generations of genetic families,namely P_(1),P_(2),F_(1),F_(2).The genetic patterns of pepper fruit number per plant was analyzed by mixed major-gene plus polygenes inheritance model.The results showed that the fruit number per plant was consistent with 2 pairs of additive-dominant-Epistatic major gene model(2MG-ADI).The additive effect value d a and d b of two pairs of major genes were-16.33 and-13.05,the dominant effect value h a and h b of two pairs of major genes were-10.02 and-2.51.The effect values of j_(ab) and j ba interaction were 8.69 and 12.93 and the effect values of additive×additive epistatic(i)and dominant×dominant(l)interaction were 6.86 and 7.23,respectively.The main effect between major genes was additive effect,followed by additive×dominant epistatic interaction effect.The heritability of major genes was 68.10%,and the variation caused by environment accounted for 31.9%,indicating that environment had relatively little influence on the result number of pepper.The results laid a foundation for the breeding of new pepper varieties with different fruit numbers per plant and the mapping of related genes.

关 键 词：辣椒 单株结果数 主基因+多基因多世代联合分析法 遗传分析 

分 类 号：S641.3[农业科学—蔬菜学]