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白葵杂1号在几年的试验、示范、推广中,表现高产、较抗斑病、抗向日葵螟虫,受到群众欢迎。为了给生产提供更多纯度高的杂交种,在亲本繁殖和制种过程中,要抓好以下几个环节。一、选地隔离选择地势较平坦,土质较肥沃的地块作繁殖、制种田。为防病害侵染,必须避免重茬或迎茬,轮作周期要求5年以上。向日葵是典型的异花授粉作物,主要靠昆虫传粉(多为蜜蜂)。繁殖、制种地块,若采用空间隔离,要求不育系74102—4A与恢复系矮113繁殖田与
Pak Kwai miscellaneous 1 in a few years of testing, demonstration, promotion, performance of high yield, more resistant to spot disease, sunflower borers, welcomed by the masses. In order to provide more high-purity hybrids for production, in the process of parental reproduction and seed production, we must grasp the following aspects. First, the choice of isolation Choose a more flat terrain, fertile soil plots for breeding, farming system. To prevent disease infection, we must avoid cropping or cropping, crop rotation requirements of more than 5 years. Sunflower is a typical cross-pollination crop, mainly by insect pollination (mostly bees). Reproduction, seed production plots, if the use of spatial isolation, requiring sterile line 74102-4A and restore the Department of short 113 breeding fields and