谷子不育系高146A不育与早抽穗性状遗传关系分析  

Genetic Relationship Analysis Between Infertility and Early-heading Date Trait in Gao 146A,A Highly Male-sterile Line of Foxtail Millet [Setaria italica(L. Beauv.)]

作　　者：乔慧琴 杜晓芬[2,3] 杨慧卿[2,3] 车星星 袁峰[2,3] 王智兰[2,3] 张丹丹[5] 田岗[2,3] 王军[2,3] 郭二虎[2,3] 刘永忠[2,3] 张林义[2,3] 彭书忠 

机构地区：[1]山西省牧工商总公司,太原030001 [2]山西省农科院谷子研究所,山西长治046011 [3]特色杂粮种质资源发掘与育种山西省重点实验室,山西长治046011 [4]山西省农科院食用菌所,太原030001 [5]山西省农业科学院,太原030001

出　　处：《中国农学通报》2015年第27期159-163,共5页Chinese Agricultural Science Bulletin

基　　金：2015年山西省农业科学院科技自主创新能力提升工程项目"谷子重要性状基因发掘与利用"(2015ZZCX-09);2014年山西省财政支农专项资金项目"谷子杂种优势利用研究与强优势组合选育"(2014ZYFZ-04);山西省自然基金项目"谷子SSR(EST-SSR)遗传连锁图谱的构建"(2012011032-1)

摘　　要：为了研究杂交组合(高146A×K103)的P1、P2、F1和F2世代群体对不育系高146A早抽穗性状的遗传特点,利用主基因+多基因混合遗传模型和χ2测验对不育基因与早抽穗控制基因间的遗传关系进行了研究。结果表明:高146A早抽穗性状表现为一数量性状,其遗传符合2对加性—显性—上位性主基因+加性—显性多基因遗传模型,以主基因作用为主,多基因的作用相对较小,其中一对主基因的加性、显性起主要作用,另一个主基因的显性和上位性效有较大作用;在F2群体中,雄性不育和早抽穗两性状共有早熟可育、早熟不育、晚熟可育和晚熟不育等4种表型,表型分离比例符合3对基因独立遗传分配规律(分离比例为39:13:9:3;χ2=3.18<χ20.05=7.81),这些结果表明控制该雄性不育系高146A的不育和早抽穗性状的三对基因为独立遗传,无连锁关系。Genetic characteristics of the early-heading date in Gao 146 A, a highly male-sterile line, wereanalyzed using the major gene plus polygene mixed inheritance model with the P1, P2, F1 and F2generationsderived from the hybrid Gao 146 A × K103, and the genetic relationship between infertility and early-headingdate was studied using χ2test methods in this paper. The results showed that the early-heading trait in Gao146 A was a quantitative trait, and was controlled by two pairs of additive-dominance-epistatic major genesplus additive-dominance polygenic model, and the major gene effect was large, but the multi-gene effect was relatively small, in which a pair of main additive genes played the major role in either additive or dominanteffect, and another major gene had a second role in dominant and epistatic effect. There were four kinds ofphenotypes of the sterility and heading date in the F2 population, namely early-heading-fertile type, early-heading-infertility type, late-heading-fertile type and late-heading-infertility type, and the segregation ratiowas 39：13：9：3, in line with the independently distribution law of three pairs of genes（χ2=3.18〈χ20.05=7.81）.These results suggested that three pairs of genes controlling the male- sterile and early- heading traitsrespectively were of independent inheritance and non-linkage relationship.

关 键 词：谷子 高度雄性不育系 早抽穗 主基因+多基因 

分 类 号：S515[农业科学—作物学]