运用程氏指数法对恢复系宜恢3551籼粳属性的鉴别

Identification of the Indica japonica Attribution of Yihui 3551 by Chen's Index Method

运用程氏指数法 ,从稃毛、酚反应、第 1穗节与第 2穗节间的长度、抽穗时壳色、叶毛和粒形等 6项指标对宜恢 3551(YR3551)的籼粳属性进行了分析。结果表明 ,YR3551总评分为 15.6分 ,属于偏粳型水稻 ;进而确定了强优势杂交组合冈优

The indica or japonica attribution of the rice restorer line Yihui 3551 (YR3551) was identified on the basis of the six indexes of the Chen's Index Method, i.e., glume hair, phenol reaction, length of the first to second rachis internode, glume color at heading, leaf hair and grain length/width ratio. The results showed that the total score of YR3551 was 15.6, indicating that YR3551 is grouped into the japonicaclinous type. Therefore, it is proved that the new hybrid Gangyou 3551 (Gang 46A/YR3551) with very strong heterosis, which has been certified and released to farmers' fields in Sichuan Province, belongs to intersubspecific hybrid rice.