玉米重组群体果穗性状的遗传潜势与杂种优势研究

选用含有Reid、Lancaster及国内地方种血缘的自交系和地方品种作为基础材料,按血缘关系分别合成3个群体,再进行群体间杂交,以3个群体和6个群体间杂交组合为试验材料,探讨群体内遗传潜力和群体间杂种优势.结果表明,穗长、穗粗、穗行数、行粒数、百粒重和子粒产量6个果穗性状在群体内遗传差异极显著,且群体间杂交后这6个性状的杂种优势均为正值,依次为子粒产量>行粒数>百粒重>穗长>穗粗>穗行数.综合这6个果穗性状表现,以D×R、R×L、R×D和L×R的总优势较。

Hybrid Heterosis and Genetic Potential of Ear Characters of Recombined Population on Maize

Using inbred lines and local variety of Reid (R.), Lancaster(L.)and domestic germplasm(D.) as basic materilas,3 populations were combined according to their pedigree relationship.With 3 populations and 6 inter-opulation crosses as study materials,the genetic potential and hybrid heterosis were studied.The result showed that in was significant of the hereditary variation of ear length,ear diameter,rows of ear,grains per row,100-grain weight and grain yield 6 characters in populations,and the heterosis values were positive of these 6 characters of inter-population crosses.The order of the heterosis values from big to small was grain yield,grain per row,100-grain weight,ear length,ear diameter and rows per ear.Comprehensive analysed the performance of the 6 characters,the crosses of strong total heterosis were D×R,R×L,R×D and L×R.