摘要
基于群体生育型结构决定其功能的规律,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演化阶段特征和演进趋向,以及该演化阶段群体生育型演化特征因素之间的复杂关系,结果显示,符合群体生育型演变进化趋向,希冀突破第Ⅳ演化阶段玉米杂交种产量水平的强优势玉米杂交种群体生育型因素组合选育模式,主要有二:1)“穗行数(X_3)+百粒重(X_6)+穗粗(X_(16))+行粒数(X_(12))”,其决定株粒重的多元线性回归式是Y=117.89+1.08X_3+1.83^(**)X_6+2.17^(**)X_(12)+23.24^(**)X_(16),与Y的复相关系数R=0.543^(**)决定系数R^2=0.295;2)“百粒重(X_6)+行粒数(X_(12))+穗粗(X_(16))”,其决定株粒重的多元线性回归式是Y=106.45+1.75^(**)X_6+2.12^(**)X_(12)+24.77^(**)X_(16),与Y的复相关系数R=0.451^(**),决定系数R^2=0.293.研究结果表明,若对群体生育型演进特征主导因素百粒重与穗行数、穗粗、行粒数关系处理得当,可选育出高产水平的强优势玉米杂交种.
Based on the regulation of the population growth types structure deciding their function and the analysis of characters and the evolution trend of the highest stage-IV evolution stage of corn hybrid population growth types evolution process in Hebei-Shangdong-Henan summer corn planting zone,this paper expounded following two selecting breeding patterns of dominate corn hybrid population growth types factors composition under certain evolution trend; (1)Rows /ear (x3) + hundred grain weight (x6) + grains/row (x12)+ear width (x16), grain weight/plant (y). Puralistic linear formula is that y=-117. 89 + 1. 08x3+l. 83 x6 + 2.17 x12+ 23. 24 x16, the correlation coefficient R = 0. 543 , the determination coefficient R2 = 0. 295, (2) Hundred grain weight (x6) + grains/row (x12)+ear width (x16), grain weight/plant (y). Pluralistic linear formula is that y=-106. 45 + 1. 75 x6 + 2. 12 x12 + 24. 77 x16,the correlation coefficient R = 0. 541 , the determination coefficient R2 = 0. 293. The dominate factor of the evolution characters of population growth types is hundred grain weight . The relation of hundred grain weight and row per ear,ear width,grains per row is subtle.
出处
《华北农学报》
CSCD
北大核心
1995年第S1期10-14,共5页
Acta Agriculturae Boreali-Sinica
基金
河北省自然科学基金资助项目
关键词
冀鲁豫夏玉米区
玉米杂交种
群体生育型
因素组合选育模式
Hebei-Shandong-Henan summer corn planting zone
Corn hybrid
Population growth types
Factors combining and selection breeding patterns.
