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采用关联定位全模型和多位点加性模型,分析了玉米巢式关联定位群体抽丝期的遗传效应。全模型关联分析揭示,玉米抽丝期受微效多基因的加性、显性、上位性及其环境互作控制,其中显性效应最为重要。在估算的总遗传率(79.86%)中,与显性效应相关的遗传率高达50.52%,其次是环境互作效应的遗传率(27.31%)。检测到的极显著(-log_(10)P_(EW)>5)数量性状单核苷酸多态性位点数为全模型50个、加性模型47个(遗传率=31.65%)。基于关联分析玉米抽丝期的结果,预测了最优自交系和最优杂交组合的基因型组配方式及相应的遗传效应值,可用于指导玉米群体优异位点的精准分子选择。
The genetic correlation effect of silkworm nested positioning group on silkworm was analyzed by using the full associative positioning model and the multi-site additive model. Correlation analysis of the whole model revealed that the dominant effect was the most important effect during maize drawing stage under the control of the additive, dominant, epistatic and environmental interactions of the microscopic polygenes. Among the estimated total genetic rate (79.86%), the heritability related to dominant effect was as high as 50.52%, followed by the heritability of environmental interaction (27.31%). The number of single nucleotide polymorphisms (-log_ (10) P_ (EW)> 5) of quantitative traits was 50 in the whole model and 47 in the additive model (heritability = 31.65%). Based on the correlation analysis of the results of maize bolting stage, the genotypes of the optimal inbred lines and the optimal crosses were predicted and the corresponding genetic effects were predicted, which could be used to guide the precise molecular selection of excellent loci in maize.