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以玉米杂交种中单909的双亲郑58和HD568及其组配得到的220个重组自交系为材料,在3个环境下对株高和穗位高的遗传特性进行剖析。通过对群体表型数据的分析,发现株高和穗位高受环境影响显著,两者的广义遗传力均较大。对株高和穗位高进行联合分离分析发现,株高在2015年夏河南新乡(环境Ⅰ)环境下符合F-2遗传模型,在2016年夏河南新乡(环境Ⅱ)和2016年春吉林公主岭(环境Ⅲ)环境下均符合G-0遗传模型;穗位高在环境Ⅰ和Ⅱ符合F-2遗传模型,在环境Ⅲ符合G-0遗传模型,说明株高和穗位高的遗传模型受环境的影响很大。该结果为相关QTL定位和广适性玉米品种选育提供理论基础。
In this study, 220 recombinant inbred lines (Zheng58 and HD568) from single 909 parents of maize hybrids were used to analyze the genetic characteristics of plant height and ear height in three environments. Through the analysis of population phenotype data, it was found that the plant height and ear height were significantly affected by the environment, and the general heritabilities of both were large. The joint segregation analysis of plant height and ear height found that the plant height conformed to the F-2 genetic model in the environment of Xiahe Nanxian (Environment Ⅰ) in 2015. In 2016 Xiahe Nanxincong (environmentⅡ) and Gongdongling Ridge Environment Ⅲ) were all consistent with G-0 genetic model. Ear height was consistent with F-2 genetic model in environment Ⅰ and Ⅱ, and G-0 genetic model in environment Ⅲ, which indicated that the genetic model of plant height and ear height were affected by environment The impact is great. The results provide the theoretical basis for the related QTL mapping and wide selection of maize varieties breeding.