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具有不同遗传特性的植物种或品种杂交后所产生的后代,都叫做杂交种。两个普通品种杂交后所产生的后代叫做品种杂交种。玉米品种和玉米自交系杂交后,所产生的后代叫做品种自交系间杂交种,在自交系间杂交种中,做杂交的亲本自交系的数目组合方式不同,分为单交种、三交种、双交种和综合种等类型。两个自交系杂交的后代,叫单交种;单交种和一个自交系的后代叫三交种;目前生产上推广应用的杂交种,主要是单交种,比其它类型的杂交种具有增产幅度大,生长整齐,繁种简便等优点,其制种技术如下:1 隔离。 配制杂交种时,必须避免两个亲本以外的花粉串花,而采取的手段就叫隔离。能起到隔离效果的地快就叫
Descendants of hybrids or cultivars with different genetic traits are hybrids. Descendants of the two common breeds are cross breeds called hybrids. After hybridization of maize varieties and maize inbred lines, the offspring produced are called hybrids of different varieties. Among the inbred lines of hybrids, the number of parental inbred lines to be hybridized is different and divided into single cross , Three crossbreds, double crossbreed and integrated species. The offspring of two inbreds are called single crossbreds. The offspring of single crossbreds and one inbred line are called “three crossbreds.” The hybrids that are currently being promoted for production are mainly single crossbreds, more than other types of crossbreds With a yield increase, tidy growth, easy species, etc., its seed production techniques are as follows: 1 isolation. When formulating hybrids, the pollen of two parents must be avoided, and the means taken is called isolation. Can play the isolation effect is called fast