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。
关键词:
冀鲁豫夏玉米区,
玉米杂种交,
群体生育型,
演化阶段,
演进趋向
Abstract: 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.
Key words:
Hebei-Shandong-Henan summer corn planting zone,
Corn hybrid,
Population growth types,
evolution stage,
Evolution trend
中图分类号:
赵殿轩, 步丰池, 苏方宏, 刘玉梅, 王泽立, 亢伟民. 冀鲁豫夏玉米区玉米杂交种群体生育型演变──Ⅱ．第Ⅳ演化阶段群体生育型特征及演进趋向[J]. 华北农学报, 1995, 10(2): 8-12. doi: 10.3321/j.issn:1000-7091.1995.02.002.
Zhao ixanxuan, Bu Fengchi, Su Fanghong, Li Yumei, Wang Zeli, Kang Weimin. Evolution of Corn Hybrid Population Growth Types in Hebei-Shandong-Henan Summer Corn Planting Zone -Ⅱ Characters of Population Growth Types at Ⅳ Evolution Stage and Its Evolution Trend[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1995, 10(2): 8-12. doi: 10.3321/j.issn:1000-7091.1995.02.002.