陆地棉矮秆突变体株高和纤维品质的QTL定位及相关性研究  

CORRELATION ANALYSIS AND QTL MAPPING FOR PLANT HEIGHT AND FIBRE QUALITY OF DWARF MUTANT IN UPLAND COTTON (Gossypium hirsutum L.)

作　　者：王新坤[1,2] 潘兆娥[2] 孙君灵[2] 何守朴[2] 唐灿明[1] 杜雄明[2] 

机构地区：[1]南京农业大学农学院/作物遗传与种质创新国家重点实验室,江苏南京210095 [2]中国农业科学院棉花研究所/农业部棉花遗传改良重点开放实验室,河南安阳455002

出　　处：《核农学报》2011年第3期448-455,共8页Journal of Nuclear Agricultural Sciences

基　　金：国家重点基础研究发展计划(973计划)(2004CB117306)

摘　　要：Ari1327是美国引进种质Ari971经60Coγ射线照射后得到的矮化突变体,以陆地棉遗传标准系TM-1为母本和Ari1327组配杂交组合,利用该组合产生的F2群体对株高和纤维品质性状进行QTL分析,共检测到4个与株高相关的QTL,分别位于Chr.3、Chr.11、Chr.14和LG6上,4个位点可解释的联合表型贡献率达74.53%;6个与纤维品质性状相关的QTL,其中2个与比强度相关,分别位于Chr.23和LG5上,其表型贡献率分别为4.85%和9.85%;1个与马克隆值相关的QTL位于LG3上,其表型贡献率为7.28%;与纤维长度、整齐度和伸长率相关的QTL均为1个,集中在LG5上,表型贡献率分别为9.86%、28.35%和28.26%。对株高和纤维品质5项指标进行相关分析,结果表明株高和纤维品质间的相关系数数值较小,未达显著水平,这说明株高和纤维品质在遗传上可能关系不大,这为株高和纤维品质的同步改良提供了理论依据。Ari1327 was a dwarf mutant derived from Ari971 introduced from America and treated by 60Co γ-rays irradiation.Cross combination was created by Ari1327 and TM-1 which was a standard genetic line for Gossypium hirsutum.QTL analysis for plant height and fiber quality traits was conducted in the F2 population of the cross.4 QTLs were identified for plant height,distributed on chromosome 3,11,14 and LG6,jointly explaining 74.53% of the plant height variance.2 QTLs were identified for fiber strength,distributing on Chr.23 and LG5,explaining 4.85% and 9.85% of the fiber strength variance,respectively.one QTL was identified for micronaire,distributing on LG3 and explaining 7.28% of the fiber micronaire variance.one QTL was identified for fiber length,fiber uniformity and fiber elongation accordingly,distributing on LG3 altogether and explaining 9.86%,28.35% and 28.26% of the variance,respectively.The correlation coefficients between plant height and fiber quality traits were all small and not significant,indicating that fiber quality traits maybe have little relative with plant height genetically,provides the theoretical foundation for simultaneous improvement of plant height and fiber quality in cotton breeding.

关 键 词：棉花 株高 纤维品质 QTL 相关分析 

分 类 号：S562[农业科学—作物学]