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杂交稻种子的纯度影响其产量高低。据调查,近几年杂交稻的杂株率一般在2～5％,高的达10％以上。 杂交稻的杂株多种多样,来源不同。现根据我们多年研究的结果,将其主要类型、来源与对策叙述如下: 1.不育系繁殖田与制种田中的杂株,主要是指不育系、保持系和恢复系等三系亲本中的杂株,这些杂株直接影响杂交稻的纯度。 不育系亲本中,杂株主要有保持系、迟不育株和半不育株三类,一般以保持系居多。而在广东、湖南、福建等南方地区,后两类杂株的比例相对较高。
The purity of hybrid rice seeds affects the level of yield. According to the survey, hybrid rice in recent years, the rate of hybrid plants generally 2 to 5%, up to 10% or more. Miscellaneous hybrid rice hybrid variety, different sources. Now according to the results of our many years of research, the main types, sources and countermeasures are described as follows: 1. Sterile breeding system and farming system of miscellaneous strains, mainly refers to the sterile line, maintainer and restorer lines such as three-line parents In the hybrids, these hybrids directly affect the purity of hybrid rice. In male sterile line parents, there are three main types of miscellaneous strains to maintain, late infertility and semi-sterile strains. In Guangdong, Hunan, Fujian and other southern regions, the proportion of the latter two types of hybrid strains is relatively high.