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制种田的产量高低主要取决于母本的异交结实率;母本异交结实率的构成,一是开花当天,柱头接受花粉受精结实,它包含非柱头外露结实和柱头外露结实。二是开花当天以后通过柱头外露来接受花粉受精结实。据测定,开花当天以后柱头外露的结实籽粒数约占总异交结实粒数的60%~90%,后者是制种产量形成的产体,具有极其重要的作用。相对而言,母本花时越早,开花
The yield of farming system depends mainly on the rate of outcrossing of the female parent. The composition of female parental seed-setting rate is that on the day of flowering, the stigma receives the pollen fertilization and fruiting, which contains the non-stigma exsertion and the stigma exsertion. Second, the day after flowering through the stigma exposed to accept pollen fertilization. According to the determination, the day after flowering stigma exposed seed number accounts for about 60% to 90% of the total outcrossing grain number, the latter is the production of seed production, has an extremely important role. Relatively speaking, the earlier the mother flower, flowering