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向日葵抗列当基因Or5的抗性遗传及分子标记筛选

2021-09-03张曼孙墨可田娟董玉迪贾云峰李慧英牛庆杰

安徽农业科学 2021年14期

张曼 孙墨可 田娟 董玉迪 贾云峰 李慧英 牛庆杰

摘要 以向日葵高感列当E的自交系09110-21264162A为母本,与抗病自交系J-09R进行杂交构建F2群体,分析了向日葵抗列当E的抗性遗传规律,并且采用SSR技术在亲本和F2代群体中筛选与抗列当基 因Or5连 锁的分子标记。结果表明:F2群体的抗感比符合3∶1的分离规律,筛选出与抗列当基因 Or5 连锁的1个分子标记ORS1036。经F2分离群体验证,该标记的表型鉴定结果与分子检测结果的一致性为94%。将该标记对84份自交系进行筛选,获得了15份可能携带 Or5 基因的抗列当资源,为抗性育种提供宝贵资源。

关键词 向日葵;抗列当;SSR分子标记

中图分类号 S 565.5  文献标识码 A

文章编号 0517-6611(2021)14-0089-04

Abstract The study was carried out by crossbreeding between sunflower broomrape E susceptible inbred line 09110-21264162A and the resistant inbred line J-09R as parents to construct the F2 population.The parents,F1 and F2 generations were inculated with broomrape and the inheritance of resistance to the plant was analyzed according to the results of phenotype observation.The linked marker was screened with two parents and a F2 population by SSR technology.The results revealed that the identification result of the individual plant of the F2 population was in line with the antiinfection ratio of 1R:3S.The Molecular Marker,ORS1036,which was linked to  Or5, was screened from F2 population and the parents by SSR technique.The results of phenotypic identification was 94% consistent with the molecular detection.This marker ORS1036 was used to screen 84 inbred lines and 15 materials which contained the marker were obtained,which could provide valuable resources for resistance breeding.

Key words Sunflower;Broomrape resistance gene;SSR marker

基金項目 国家现代农业产业技术体系和吉林省科学技术厅重点科技研发项目(20180201070NY)。

作者简介 张曼(1987—),女,河北辛集人,助理研究员,在读博士,从事分子育种研究。*通信作者,研究员,从事向日葵育种研究。

收稿日期 2020-11-27

向日葵列当( Orobanche cumana) 是1年生全寄生性杂草,依靠短须状假根寄生在向日葵根系上存活,被列当寄生后的向日葵植株茎秆低矮细弱,向日葵产量和品质明显降低[1-4]。

危害向日葵的列当群体中有很多生理小种,已鉴定出编号为A~H的8个向日葵列当小种[5-6]。在我国D小种出现的频率最高,是我国向日葵列当的优势生理小种。E小种主要分布于新疆和内蒙古的不同区域[7]。

在世界范围内,列当的防除一直以来都是一大难题。目前在生产上防御和控制向日葵列当最经济、最有效的方法就是推广培育向日葵抗列当品种。……

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