关键词: 玉米[45CJ, 49EJ], 硫酸盐吸收, 亲和力[62K], 配合力[45CG], 基因效应, 作物育种[49DD]

Abstract: This paper deals with the genetic effects on yield and 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 there were significantly non-additive gene action and overdominance with the two traits. The dsitribution of positive and negative gene frequency behaved an unsymmetry for all characters. The dominance direction for Km was on the decrease, but for yield was on the increase. According to combining ability and Hayman's analysis results, the relationship between Km and yield was significantly close to each other. Two best ovetall inbred lines, "Heer and 292", and three bybrids, "Heer/Zhongduo5-1, 8112-3/292 and 292/Bjk108-23", which might have the characteristics of wide adaptation and high grain yield, were identified.

Key words: MAIZE, SULFATE UPTAKE, AFFINITY, COMBINING ABILITY, GENETIC EFFECT, CROP BREEDING