苏丹草主要性状遗传的初步研究

Studies on Some Hecreditary Properties of Sudangrass(Sorghum sudanense).

以不同来源的６个苏丹草（Ｓｏｒｇｈｕｍｓｕｄａｎｅｎｓｅ）品系为材料，研究了与产草量有关的８个性状的基本遗传参数、性状间相关和遗传通径分析。结果表明，遗传变异系数以叶宽最大，抽穗期最小；单株干重的遗传力最低，抽穗期的遗传力最高；株高和叶宽的遗传力也很高，与株重的正向遗传系数达显著水平，对株重的直接和间接效应最大。因此，株高和叶宽既是田间直接选择的主要性状，又是对株高进行间接选择的主要性状。

Hereditary properties of eight characters oc herbage production were studied on six su- dangrass lines of different origins. Correlative and parametric analyses were made and the results showed that :leaf width had the biggest hereditary variation and heading time had the smallest hereditary variation; dry weight of single plant bad the highest hereditary capacity and heading time had the lowest hereditary capacity ;plant height and leaf width had high hereditary capacities and showed significant positive relationship with plant weight :plant height and leaf width had important enfluence on plant weight.Therefore,these two characters are key parameters for both direct and indirect selections.