拥有这个基因的科学油菜会生产一种特殊的蛋白质，又可以减少使用化学杀菌剂，现抗但不影响其有性生殖。油菜叶斑因

科学家发现抗油菜叶斑病基因

2011-09-06 15:44 · milliegu

英国研究人员发现了一种能够抗油菜叶斑病的病基基因，

英国赫特福德郡大学等机构的科学研究人员在英国新一期《植物病理学》（Plant Pathology）杂志上报告说，他们在一些油菜变种中发现了这个代号为R的现抗抗病基因，据介绍，油菜叶斑因相关病原菌有性生殖的病基频率不高，这种蛋白质能够限制叶斑病病原菌的科学无性生殖，既可以增加产量，现抗则油菜患叶斑病的油菜叶斑因几率会大为降低。他们希望在此基础上培养出能够抗病和高产的病基新品种油菜。保护环境。科学

具体地说，现抗如果能在此基础上培育出新的油菜叶斑因油菜品种，这是一种新的抗叶斑病的方式。它位于油菜的A1号染色体上。

英国研究人员发现了一种能够抗油菜叶斑病的基因，影响叶斑病病原菌的繁殖行为。因此如果油菜全部含有R基因，他们希望在此基础上培养出能够抗病和高产的新品种油菜。

参与研究的布鲁斯•菲特教授说，

生物探索推荐英文论文摘要：

Controlled-environment and field experiments were done to investigate effects of the fungicide Punch C (flusilazole plus carbendazim) on growth of Leptosphaeria maculans and L. biglobosa in oilseed rape. In controlled-environment experiments, for plants inoculated with L. maculans, fungicide treatment decreased lesion size and amount of L. maculans DNA in leaves; for plants inoculated with L. biglobosa, fungicide did not affect lesion size or amount of pathogen DNA. When release of ascospores was monitored using a Burkard spore sampler, the timing and pattern of ascospore release differed between the four seasons. In 2006/2007, the majority of ascospores released were L. maculans, whilst in 2007/2008 the majority were L. biglobosa; in both seasons L. maculans ascospores were released before L. biglobosa ascospores. In field experiments in 2002/2003 and 2003/2004, fungicide treatment decreased severity of stem canker on cv. Apex, but gave no significant yield response. In 2006/2007 and 2007/2008, fungicide treatment decreased phoma leaf spot incidence in autumn and stem canker severity at harvest, and increased yield. Fungicide treatment decreased stem canker severity more on cv. Courage, with a good yield response, than on cv. Canberra. In 2002/2003 and 2003/2004, fungicide treatment decreased the frequency of spread of L. maculans into stem pith tissues and in 2006/2007 fungicide decreased the amount of L. maculans DNA in stem tissues (measured by quantitative PCR). These results are used to suggest how effects of fungicides on interactions between L. maculans and L. biglobosa might affect severity of phoma stem canker and yield response.

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