土壤不同养分条件下高粱主要农艺性状的遗传分析

Genetic Analysis of the Major Agronomic Characters of Sorghum Grown Under Different Soil Fertility Levels

以 13个外引高粱品种为试材 ,分别播种于中等肥力地块 (对照区 )和瘠薄地块 (鉴定区 )。遗传分析表明 ,所有 9个性状在品种间差异均达极显著水平 ,土壤的养分状况不影响品种间差异性的表达。两区各性状的遗传变异幅度基本趋于一致 ,但各性状在两区的遗传变异系数之差值却有明显不同 ,该值愈大 ,说明该性状对土壤养分愈敏感。试验中该值较大的性状有穗粒重、三级枝梗数和二级枝梗数 ,对旱瘠地来说属不良性状 ,但却有大的改良潜力。其余 6个性状的该值较小 ,其中以穗长为最小 ,这可为高粱抗性材料的早期选育工作提供依据 ,也使高粱资源的遗传评价更为深刻。

sorghum varieties were planted in both rich and poor soil.Analytic results revealed that the variance of the nine characters concerned was highly significant among varieties.The state of soil fertility does not affect the variance.The ranges of genetic variance of the characters in both soils are basically the same,but the genetic variance coefficients for the characters in both soils are quite different from each other.The more the coefficient is,the more the sensitivity the character to the soil is.Some characters are undesirable properties to the dry land and poor soil,but they mean large room of improving potential.The length of spike had minimum genetic variance coefficient.The result provided a foundation for the selection of sorghum resistance material and made the genetic evaluation of sorghum resources more profoundly and more comprehensively.