玉米主要抗旱性状的配合力及遗传参数分析 Ⅲ.生育时期

Analysis of Combining Ability and Hereditary Parameter of Major Drought Resistance Traits in Maize Ⅲ.Development Stages

按Griffing双列杂交(Ⅳ)方法,分析了8个玉米自交系的播种至散粉期日数、播种至吐丝期日数和散粉至吐丝间隔在雨养地和水分胁迫下的GCA、SCA及遗传变量。结果表明:三者均以加性基因效应为主,选择时GCA较为重要;水分胁迫对生育时期的影响较大,对其遗传改进和选择应在正常条件下进行。

The general combining ability(GCA),special combining ability (SCA)and hereditary parameter of days from seeding to flowering time,days from seeding to silking time and ASI in8inbred lines of maize under normal condition and water stress are analyzed based on Griffing diallel crossing(Ⅳ).The result indicated that those traits are majorly controlled by additive gene efficiency.Genetic reclamation and selection should be made under normal water condition for water stress affection violently.