胚乳性状质量-数量遗传的极大似然鉴别方法及其应用

 采用胚乳性状质量 -数量遗传的极大似然鉴别方法 ,进行质量 -数量遗传模型测验和主、微基因效应与变异估计 ,以 F2 和 F3胚乳世代为例详细演示了分析程序 ,将之应用于 3个籼稻组合直链淀粉含量的遗传分析。结果表明 ,直链淀粉含量为一典型的胚乳质量 -数量性状 ,由一个主基因和若干微基因共同控制 ;控制高、低和糯的主基因可能为一组复等位基因 ,且高对低、高对糯接近完全显性 ;微基因对直链淀粉含量的作用在不同组合可以是主基因变异尺度的1 /2～ 1 /

Maximum Likelihood Method for the Qualitative-quantitative Inheritance of Endosperm Traits and Its Application in the Genetic Analysis for Amylose Content in Indica Rice

The paper proposed a maximum likelihood method for the qualitative quantitative inheritance of endosperm traits,which included qualitative quantitative genetic model test,effect and variation estimation of major gene and polygenes.The analysing procedure was demonstrated with F 2 and F 3 endosperm generations and used to investigate the qualitative quantitative inheritance of amylose content(abbreviated to AC)in three indica rice crosses.The results showed that AC is a typical endosperm qualitative quantitative trait controlled by a major gene as well as polygenes.The major gene for high AC,low AC and waxy is a group of multialleles.The allele for high AC is approximately complete dominant to that for low AC and waxy.Genetic variation caused by polygenes is about from one quarter to one half of the genetic variation of the major gene in different crosses.