花生叶斑病抗性与产量性状的相关研究

Study on the Correlation of Resistance to Leafspot and Yield Characters in Groundnut

用43份材料研究了花生叶斑病抗性与产量性状的关系,结果表明:单株产量与抗病性呈二次抛物线关系,抗病性对丰产性的制约程度接近20%;出仁率与抗病性近于呈负的直线关系;单株饱果数、百果重与抗病性之间表现曲线相关趋势,但相关系数远不显著。从研究结果预测:通过对抗病性、单株饱果数、百果重的选择,可选育出抗病高产品系;通过对早熟-丰产性的选择,可选育出耐病高产品系。

Correlation of resistance to leafspot and 4 yield characters were studied by 43 groundnut lines. The results showed that the correlation between the productivity per plant and resistance was quadratic parabola and the resistance restricted yield almost to the extent of 20%, while the correlation between shelling ratio and the resistance was minus linearity correlation. The relativity between mature pods per plant or 100-pod weight and the resistance was almost curvilinear, but both the coefficients of correlation were not significance. It was forecasted from the results that the lines of high-yield && resistance to leafspot could be bred by selecting the resistance, mature pods per plant and 100-pod weight and the lines of high-yield && endurance to leafspot by selecting the prematurity and high-yield.