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目前,世界各国都在致力于培育适应本国各地区土壤、气候特点及不同生产水平的优良杂交种。当前各国的玉米育种主要以高产形态和生理基础为依据,重点选育高密度条件下的高产类型。重视株型紧凑,叶片上举,秆坚硬强壮、多抗类型的选择。那么辽宁省玉米育种家选育的理想株型应是:上部叶片直立,下部叶片平展,叶片光合效率高,适合密植,苗期耐低温,抗倒抗病耐瘠薄,灌浆期延长的高产品种。
At present, all countries in the world are devoting themselves to cultivating fine hybrids that adapt to the soil and climatic characteristics and different levels of production in various regions of the country. At present, maize breeding in various countries is mainly based on high-yielding forms and physiological basis, and focuses on breeding high-yielding types under high-density conditions. Emphasis on compact plant type, leaves on the move, hard sturdy straw, multi-type anti-choice. Then the ideal plant type breeding of corn breeders in Liaoning Province should be: the upper leaves erect, the lower leaves flat, high photosynthetic efficiency of leaves, suitable for close planting, seedling low temperature, resistance to disease resistance barren, prolonged grain filling of high yield varieties.