摘要
运用群体生育型特征与演化的观点，分析了冀、鲁、豫夏玉米区玉米杂交种群体生育型演化进程至端的第Ⅳ演化阶段群体生育型基本特征与演化特征及其演进趋向，结果表明，第Ⅳ演化阶段群体生育型基本特征表现为株型紧凑或半紧凑，穗位叶适中，雄穗分枝较少，抗倒性和抗斑性优良，籽粒长，出籽率高；其演化特征主要由穗粒结构与第一叶面积、生育日数决定，其穗长演化将趋于稳态，穗行数、穗粗、百粒重、行粒数与第一叶面积、株高将呈现较明显的持续演进态势，其中生育日数、行粒数和株高将分别向早熟、多粒和高棵方向回归。第Ⅳ演化阶段群体生育型演进临近转型期。
Characters of corn hybrid population growth types at IV evolution stage and its evolution characters and trend in Hebei-Shandong-Henan summer corn plantiug zone were analyzed in this paper. The results showed that the basic characters of the evolution stage were: well-knit or half-knit plant type, optimum ear leave size, less branch on male, better spotted diseases and lodging resistance, long grain, high rate of grain production. The evolution characters were mainly determinated by structure of ears and grains, the first leave area and growth period duration. Ear length will be stable. Row numbers of each ear, ear width, hundred grain weight and grain number of each row, the first leave area and plant height will show an obvious sustainable evolution status. Such characters as earlier maturity, more gran numbers of each row and higher plant are the development trend of the corn hybird. The population growth type at IV evolution stage is close to transferring stage.
出处
《华北农学报》
CSCD
北大核心
1995年第2期8-12,共5页
Acta Agriculturae Boreali-Sinica
基金
河北省自然科学基金
关键词
玉米
杂种
群体生育型
演化阶段
群体生育型
Hebei-Shandong-Henan summer corn planting zone
Corn hybrid
Population growth types
evolution stage
Population growth types
Evolution trend
