烤烟几个重要植物学性状的遗传分析  

Genetic Analysis of Several Important Botanic Traits in Flue-cured Tobacco

作　　者：张兴伟[1] 王志德[1] 任民[1] 刘艳华[1] 牟建民[1] 

机构地区：[1]农业部烟草生物学与加工重点实验室,中国农业科学院烟草研究所,青岛266101

出　　处：《中国烟草科学》2012年第5期1-8,共8页Chinese Tobacco Science

基　　金：国家烟草专卖局专项“中国烟草种质资源平台建设”项目{国烟办综[2005]501号};中国农科院基本科研业务费专项资助(0032010036);低危害烟叶研究开发[110201101006(ts-06)];中国农业科学院烟草研究所所长基金(TR2011-12)

摘　　要：利用"主基因+多基因"混合遗传模型的6个世代联合分离分析方法,分析烤烟组合丸叶×Coker319几个重要植物学性状的遗传效应。结果表明,烤烟的株高、叶数、叶面积和鲜叶重受2对加性-显性-上位性主基因+加性-显性-上位性多基因控制,株高与叶数遗传以加性效应及显性×显性上位性效应为主,叶面积和鲜叶重各遗传效应相差不多,其上位性效应>加性效应>显性效应,F2世代的主基因遗传率分别为57.53%、42.63%、30.32%和44.26%。移栽至中心花开放天数受2对加性-显性-上位性主基因+加性-显性多基因控制,以加性×加性上位性效应、加性效应及显性×显性上位性效应为主,主基因遗传率为64.79%。茎围和比叶重均受1对完全显性主基因+加性-显性多基因控制,茎围遗传以多基因为主,其多基因加性效应和显性效应大小相当,比叶重遗传主基因、多基因的加性效应和显性效应大致相当,主基因遗传率分别为2.48%和38.71%。叶形指数受1对加性-显性主基因+加性-显性-上位性多基因控制,主基因加性效应与显性效应基本相当,主基因遗传率为49.64%。叶长、叶宽、节距和蒴果重受加性-显性-上位性多基因控制,多基因遗传率分别为60.75%、62.14%、75.08%和82.34%。The joint segregation analysis method of mixed major gene plus polygene genetic model was used to study the inheritance of important botanic traits in flue-cured tobacco.Six generations（P1,P2,F1,B1,B2 and F2） from the crosses（Wanye×Coker319） were investigated.It was found that plant height,leaf number,leaf area and fresh leaf weight in flue-cured tobacco appeared to be a quantitative trait and their inheritances fitted to a mixed genetic model of two major genes with additive-dominant-epistatic effects plus polygenes with additive-dominant-epistatic effects（E0 model）.Plant height and leaf number was mainly controlled by the additive effect and the epistatic effect of dominance × dominance.The additive,dominant and epistatic effects which the epistatic effect the additive effect the dominance effect of leaf area and fresh leaf weight were all important.Heritabilities of the major genes were estimated to be 57.53%,42.63%,30.32% and 44.26% in F2.The inheritance of days of transplanting to flowering fitted to a mixed genetic model of two major genes with additive-dominant-epistatic effects plus polygenes with additive-dominant effects（E1 model） and it was mainly dominated by the epistatic effect of additive × additive,the additive effect,and the epistatic effect of dominance × dominance,the heritability of the major gene was 64.79% in F2.The inheritance of stem girth and leaf mass per area fitted to a mixed genetic model of one major gene with complete dominant effects plus polygenes with additive-dominant effects（D3 model）,stem girth was principally controlled by polygenes which additive effect was equal to its dominance effect,the heritability of the major gene was 2.48% and 38.71% in F2.The inheritance of leaf index fitted to a mixed genetic model of one major gene with additive-dominant effects plus polygenes with additive-dominant-epistatic effects（D0 model）,the additive effect and the dominance effect of the major gene was almost equal,the heritability of the major gene was 49.64% in

关 键 词：烤烟 植物学性状 主基因+多基因 遗传分析 

分 类 号：S572[农业科学—烟草工业]