论文部分内容阅读
以郑58×PH4CV杂交种构成的6个世代群体为试验材料,在玉米灌浆期,取正常生长玉米植株以穗位处作为着力点测定与地面夹角呈60°时拉力。通过P1、P2、F1、F2、B1、B2共6个世代联合分析法,以玉米茎秆拉力为性状,研究控制玉米茎秆倒伏性的基因遗传分离规律。结果表明,分离世代F2和B1群体茎秆拉力数值呈多峰分布,并有一个主峰表现明显,B2群体茎秆拉力数值频率主要呈多峰分布。玉米茎秆拉力强度遗传为多基因数量性状控制,多基因遗传率较高,达到96.12%,说明要选育茎秆拉力强度较高的品系,基础试材非常关键,而且要注重早代试材的筛选。
Six generations of Zheng 58 × PH4CV hybrids were used as experimental materials. During the grain filling stage, normal-growing corn plants were taken at the ear position and the pull angle was measured at a 60 ° angle with the ground. Through six generations of P1, P2, F1, F2, B1 and B2, a joint genetic analysis was conducted to study the genetic segregation of maize stalks under the stress of stalk tension. The results showed that there was a multi-peak distribution of stalk tensile force in F2 and B1 population, and one main peak was obvious. The numerical frequency of stalk tension in B2 population was mainly multi-peak distribution. Tensile strength of maize stalks was inherited as the control of quantitative traits of polygenic traits, with a high polygene heritability of 96.12%, indicating that it is crucial to select the strains with high tensile strength of the stalk. Screening.