阴云伙 陈云凤 徐晓明


摘要[目的]研究R318的抗褐飞虱特性与育种利用。[方法]以TN1、RHT、B5为对照,对R318及其衍生品系进行褐飞虱田间抗虫鉴定,用抗性基因Bph15引物MS5对R318及其衍生品系进行分子检测。[结果]田间鉴定R318对褐飞虱表现为抗,其衍生品系表现为中抗-感虫;分子检测R318及其衍生品系与B5具有一致的带型。[结论]R318含有的抗性基因可能是Bph15。
关键词 R318;褐飞虱;抗性基因;分子标记辅助选择;Bph15
中图分类号 S503 文献标识码 A 文章编号 0517-6611(2017)03-0157-02
Abstract[Objective]Characteristics of resistance to brown planthopper and breeding utilization of R318 were studied.[Method]With TN1,RHT and B5 as control, resistances to brown planthopper in field of the R318 and its derived strains were identified. Molecular detection of R318 and its derived strains was done by primer MS5 of resistance gene Bph15. [Result] R318 was manifested as resistance to brown planthopper by field identification, its derived strains were manifested as medium resistancesusceptibility to brown planthopper. R318 and its derived strains have indistinguishable fingerprinting patterns with B5 by molecular identification.[Conclusion]It is considered R318 and its derived strains may contain resistance genes Bph15.
Key words R318;Brown planthopper;Resistance gene;Markerassisted selection;Bph15
稻飛虱是严重为害水稻的害虫之一,抗飞虱品种培育是控制稻飞虱危害最经济和环境友好的途径,而筛选与鉴定稻飞虱抗源是抗性育种的基础与关键[1]。目前鉴定的抗源大多数为野生稻或印度次大陆及东南亚的农家种,综合农艺性状较差,较难一步到位进行利用[2]。从推广品种中寻找综合性状、抗性均较好的材料并结合分子标记辅助选择进行抗性改良,具有较好的实践价值。
R318是1990年前后从湖南杂交水稻工程技术中心郭名奇老师处引进的恢复系,系谱不详(罗利军等认为可能来自轮回422/选10-19[3-4])。利用该材料与安湘S配组的两系杂交水稻安两优318分别通过国家(国审稻2003058)及江西省(赣审稻2001020)审定,国家区试鉴定中抗褐飞虱(3级)、中抗白背飞虱(3~5级)、对灰飞虱表现中抗至抗(3级);相关专家现场鉴定意见为安两优318中抗稻飞虱[4-5]。该品种大面积推广应用20余年来,其抗性至今仍没有丧失,但R318中所含抗性基因少见报道。笔者在利用分子标记辅助选择技术检测B5抗性基因Bph15时发现,SSR引物MS5对R318同样具有多态性。……