水稻粳型亲籼系的鉴定

Identification of Rice Indica-compatible Japonica Lines

培育水稻粳型亲籼系是克服水稻籼粳亚种间杂种不育性,实现籼粳亚种间杂种优势利用,促进水稻产量进一步提高的一条有效地途径。利用88对SSR标记多态性分析的资料,采用Dj值分析法对42个待测粳型亲籼系进行粳型性鉴定,从中筛选出18个偏粳型材料;利用4个籼型和4个粳型测验种对其中13个偏粳型待测粳型亲籼系进行亲和性测定,结果鉴定出5个偏粳型特异亲籼系和6个偏粳型广亲和系。

Development of indica-compatible japonica lines（ICJLs） is one of the promising ways to exploit the heterosis between indica and japonica rice by overcoming the F1 hybrid sterility and to raise rice yield.In the present study,88 microsatelite markers were used to analyze the genetic polymorphism of 42 can-didate ICLJs.According to the standard of Dj value classification method,18 of the 42 candidate ICLJs belonged to quasi-japonica group.The compatibility of the 13 candidate ICLJs with quasi-japonica characteristics were identified with 4 indica and 4 japonic testers.The results showed that 11 of the 13 lines were conformed to the criterion of ICJLs,5 of which belonged to exceptionally indica-compatible quasi-japonica lines while 6 lines belonged to wide-compatible quasi-japonica lines.