以八月红(Pyrus communis L.‘Bayuehong’)×砀山酥梨(P.×bretshneider‘Dangshansuli’)F1代杂交分离群体(共118株)为试材,测定了成熟果实的酸含量,从表型上分析了梨果实含酸量的遗传规律。利用225对源自梨和苹果基因组的SS...以八月红(Pyrus communis L.‘Bayuehong’)×砀山酥梨(P.×bretshneider‘Dangshansuli’)F1代杂交分离群体(共118株)为试材,测定了成熟果实的酸含量,从表型上分析了梨果实含酸量的遗传规律。利用225对源自梨和苹果基因组的SSR引物,结合分离群体分离分析法(Bulked Segregant Analysis,BSA)和选择基因型分析(Selective geno-typing,SG)法,对酸/低酸性状进行群体分离分析,结果表明,标记KU10与果实酸/低酸性状连锁,遗传距离为12.15cM,并由此将果实酸/低酸性状的QTL初步定位到梨遗传图谱的第2连锁群上。表型分析和标记分析结果表明,梨果实酸性状对低酸性状为显性,受加性效应和环境因素的影响,同时存在一定的非加性效应。展开更多
[Objective] The aim was to study the internal relationship of the four theories on natural selection unit. [Method] The value field of fitness of heterozygote was investigated by constructing mathematical models, to c...[Objective] The aim was to study the internal relationship of the four theories on natural selection unit. [Method] The value field of fitness of heterozygote was investigated by constructing mathematical models, to clarify the internal relations of the four theories on natural selection unit. [Result] According to mathematical modes constructed in the study, only the mutated genes meet the requirements of natural selection on heterozygous and homozygous aspects, as well as show high fitness in heterozygous condition, could the mutated genes be kept, giving consideration to both individual and population adaptation. Thus, this methodology theoretically inte- grates the theories of individual selection, collective selection, and genetic selection as well as Kimura＇s neutral theory of health information. [Conclusion] The result of this study suggested that the four theories on natural selection unit can co-exist, and share common premises.展开更多
基金Supported by the Scientific Research Program of the Education Department of Guangxi Zhuang Autonomous Region of China (200807MS065)the Education Department of Guangxi Zhuang Autonomous Region of China (201106LX743)~~
文摘[Objective] The aim was to study the internal relationship of the four theories on natural selection unit. [Method] The value field of fitness of heterozygote was investigated by constructing mathematical models, to clarify the internal relations of the four theories on natural selection unit. [Result] According to mathematical modes constructed in the study, only the mutated genes meet the requirements of natural selection on heterozygous and homozygous aspects, as well as show high fitness in heterozygous condition, could the mutated genes be kept, giving consideration to both individual and population adaptation. Thus, this methodology theoretically inte- grates the theories of individual selection, collective selection, and genetic selection as well as Kimura＇s neutral theory of health information. [Conclusion] The result of this study suggested that the four theories on natural selection unit can co-exist, and share common premises.
