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我省耕作制度复杂,复种指数较高.不少地方玉米是间、套作物,或与前茬麦子套作,或与棉花间作.还有一些地方实行麦—玉米—稻的三熟制.为了兼顾前后茬作物的生长,要求玉米既高产又早熟.即使复种指数不高的地方,在高产前提下,早熟玉米仍是受欢迎的.单交种生育期与亲本自交系关系密切.选用早熟自交系组配单交种即可达到早熟的目的,但其产量往往不高.为了选育早熟高产单交种,我们在选育
In our province, the tillage system is complicated and the multiple cropping index is higher, and in many places the maize is intercropped with crops, or intercalated with wheat, or with cotton, and in some places, the three-crop system of wheat-corn-rice Taking into account the growth of the crop both before and after the crop requires corn is both high yield and precocious.Even if the multiple cropping index is not high, under the premise of high yield, premature corn is still welcome.Parental cross and the parental inbred lines are closely related. Inbred lines with single cross-species can achieve the purpose of early maturity, but the yield is often not high .In order to breed single-species early maturing and high yield, we are breeding