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早熟高产是现代玉米育种工作的两个重要性状。几十年来,育种工作者在选择高产性状的同时,力求缩短杂交种的生育期。在美国已把籽粒产量、抗虫性和生育期作为最重要的育种目标。国内在早熟性和籽粒产量的问
Early maturity and high yield are two important traits of modern maize breeding. For decades, breeders have sought to shorten the breeding period of hybrids while choosing high yield traits. In the United States, grain yield, insect resistance and growth period have been the most important breeding targets. Domestic questions about the precocity and grain yield