对东农群体-1的两轮测交株表型值与配合力进行了相关分析,同时还用亲子相关法估算配合力的狭义遗传力。结果表明,测交株的株高、穗高、抽丝幼穗数同配合力的相关系数达到0.05或0.01的显著水平,其中抽丝幼穗数对玉米选株测交更有指导作用。结果还表明,高配合力的测交株遗传力也高。说明提高选择强度能加速加性基因的积累。 The phenotypic values ​​and combining ability of two rounds of crossbred strains of Dongnong population-1 were analyzed, and the narrow heritability of combining ability was also estimated by the method of parent-child correlation. The results showed that the correlation coefficient of plant height, panicle height, spinning number and combining ability reached significant level of 0.05 or 0.01. The spinning number of panicles played a guiding role in the test of corn selection. The results also show that the high combining ability of crossbred heritability is also high. Explain that increasing the selection intensity can speed up the accumulation of additive genes.