【摘要】 本文以来源不同的9个玉米自交系及其按双列杂交组成的36个杂交种为材料，研究了玉米幼苗根系对硫酸盐（Na235SO4）亲和性（Km）的配合力。结果表明：m以非加性基因效应较重要，Km与产量间有密切关系。鉴定出可供五米育种中利用的2个自交系“合二”、“292”及具有更广泛适应性和高产特性的3个杂交组合：5005、5022、5030。更多还原

【Abstract】 The present paper is concemed in the combining ability of sulfate uptake affinity(Km) by seedling roots in maize. The data used in analysis came from an experiment involving 9 inbred lines and their 36 single crosses in a diallel mating design, without reciprocals. The results showed that the specific combining ability mean square was very significant and important for Km, indicating the presence of con-siderable amount of nonadditive gene effeets in the control of sulfate uptake. There was significantly close relation between Km and yield. A further noteworthy finding in this study was the identificahon of two in-bred lines, “Heer”and“292”, which were the best overall parents for improving affinity of sulfate uptake,and that of three hybrids which may possess characteristics of wide adaptation and high yield.更多还原