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作物育种多以籽粒产量为目标。玉米全生育过程的营养生长和生殖生长既对立又统一。生殖生长(即经济性状)的发育与营养生长(即结构性状)的发育,具有一定的但又非恒定的关系。植株诸性状间息息相关,相互协调彼此影响;同时,在一定范围内,一定程度上表现多变,其时态上和形态上的变异与离差为遗传型所制约和环境条件所左右。在玉米育种中,认识并掌握玉米单交种主要性状的遗传变异规律,从已知预测未知,对加强育种自觉性提高选育工作效率,是非常必要的。试验估算了玉米单交种主要性状的遗传力(广义),表型与遗传变异系数,相对遗
Crop breeding mostly targets grain yield. The growth and reproduction of vegetative and reproductive growth in the whole process of corn are antithetical and unification. Reproductive growth (ie, economic traits) and vegetative growth (ie, structural traits), have a certain but not constant relationship. Plants are closely related to each other and coordinate with each other. At the same time, within a certain range, they are somewhat changeable in performance. Their temporal and morphological variations and dispersion are controlled by genetic types and environmental conditions. In maize breeding, it is necessary to know and grasp the genetic variation of the main traits of maize single cross, which is unknown from the known forecast and enhance the consciousness of breeding to improve the efficiency of breeding. The test estimates the heritability (broad sense), phenotypic and genetic coefficient of variation of major traits of maize single cross, relative