一、几种杂株类型我省近年杂交水稻生产中,因杂交稻种不纯而造成减产所发生纠纷的案件多起。从我们组织查处的调查情况看,主要有以下几种类型:1.杂种中混杂有保持系、不育系和恢复系。从调查结果看主要是前两种。这类杂株率高的达20%左右。其特点保持系抽穗期比中杂汕优63早30多天,植株茎秆基部和叶缘均呈紫色,分蘖力较差,植 First, several types of hybrids In recent years, hybrid rice production in our province, due to impure hybrid rice caused by the case of reduced production of more cases. Investigations investigated from our organization to see the situation, mainly in the following types: 1 hybrids are mixed with the maintainer, sterile and restorer lines. From the survey results are mainly the first two. Such a high rate of about 20% of the plant. Its characteristics to maintain the Department of heading faster than Zhongyou Shanyou 63 more than 30 days, plant stems and leaf margin at the base were purple, poor tillering ability, planting