水稻待测粳型亲籼系的亲籼性鉴定

摘要

[ Objective ] The aim was to breed the indica-compafible japonica lines (ICJLs). [ Method ] Theindica-compatibility of 5 candidate ICJLs were tested based on the pollen fertility and spikelet fertility of F1 hybrids with 6 indica testers, 6 japonica testers and 6 middle testers.[ Result] Candidate ICJL G2123, G2417, G2410 and G3005 were grouped into the exceptionally(Specific) indica-compatible lines based on their high indica-compatibility and low japonica-compatibility. Candidate ICJL G2615 was grouped into the non-compatible lines on their low indicacompatibility and low japonica-compatibility. [ Conclusion ] The testers, fertility identification standards, test methods of pollen fertility and spikelet fertility were discussed when the compatibility of CICJLs was tested. The reason of the indica-compatibility in G2417 was analyzed.%[目的]选育梗型亲籼系.[方法]选用6个籼稻、6个粳稻和6个广亲和测验种,以F1代花粉育性和小穗育性为指标,测定了5个待测粳型亲籼系的亲籼性.[结果]待测粳型亲籼系G2123、C2417、C2410和G3005亲籼,不亲粳,为特异亲籼系;C2615不亲籼,也不亲粳,为不亲和系.探讨了粳型亲籼系亲籼性测定时的测验种、育性指标、花粉育性和小穗育性的测定方法,分析了C2417高亲籼性的原因.[结论]G2417自交结实率(小穗育性)95.1%,与6个籼稻测验种杂交的F1代平均结实率(小穗育性)94.5%,是个亲籼性极好、综合性状优良的亲籼系.