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1 明确杂株的类型分期对待杂交水稻制种田的杂株类型有不育系行间的保持系、变异株、异品种和父本行间的变异株与异品种,占杂株比例最大,对种子纯度危害最大的往往是不育系行间的保持系。这也是杂交水稻制种要除去的主要对象。不同类型杂株的关键性状的表现时间是不一样的。保持系要比不育系早抽穗2～3d,异品种、变异株此时性状表现不明显,难以发现和识别,可在授粉至收割期间,在其尚未散粉之前拔除。
1 clear the type of hybrid plants staged hybrid rice hybrids of the types of non-sterile line with the line between the maintainer line, variant strains, different breeds and paternal line variants and varieties, accounting for the largest proportion of hybrids, right The most serious damage to the purity of seeds is often the maintainer line between CMS lines. This is also the main target for hybrid rice seed production. Different types of hybrids of the key traits of the performance time is not the same. Preserved lines were 2 to 3 days older than CMS lines, and different varieties and mutants did not show obvious traits at this time and were difficult to find and identify. They could be unplugged before they were loosened during pollination to harvest.