Identification and Evaluation of Resistance to Rice Blast in Guangxi Wild Rice Resources

doi:10.3969/j.issn.1001-7216.2009.04.15

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Identification and Evaluation of Resistance to Rice Blast in Guangxi Wild Rice Resources

WEI Yanping1,5, HUANG Dahui2,3, CHEN Yingzhi1,3 , LIU Chi2, YANG Lang1,4, LUO Xuemei3, MA Zengfeng1,2, ZHANG Yuexiong1,2, LIU Yali1,3 , YANG Xinqing2, LI Rongbai1,2,3,*

1 Guangxi Crop Genetic Improvement and Biotechnology Laboratory, Nanning 530007， China; 2 Rice Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China; 3 College of Agriculture/College of Life Science & Technology, Guangxi University, Nanning 530005， China； 4 Plant Protection Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007， China; 5 Agroinformation Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007， China; *Corresponding author， E-mail: lirongbai@gxaas.net

Received:1900-01-01 Revised:1900-01-01 Online:2009-07-10 Published:2009-07-10

广西野生稻资源抗稻瘟病材料的鉴定与评价

韦燕萍1,5,黄大辉2,3,陈英之1,3, 刘驰2,杨朗1,4,罗雪梅3,马增凤1,2,张月雄1,2

1 广西作物遗传改良生物技术重点开放实验室，广西南宁 530007； 2 广西农业科学院水稻研究所，广西南宁 530007； 3 广西大学农学院/生命科学与技术学院，广西南宁 530005； 4 广西农业科学院植物保护研究所，广西南宁 530007； 5 广西农业科学院情报研究所，广西南宁 530007； *通讯联系人， E-mail: lirong<A href=

Abstract

Abstract: Rice blast, caused by Magnaporthe grisea, is one of the most destructive diseases in rice worldwide. Exploitation of resistance gene resources for rice breeding is of most importance in control of this disease. Thirtyeight of 1500 accessions of Oryza rufipogon Griff. and 18 of 113 accessions of O. officinalis Wall. ex Watt. originated from Guangxi, China were found to be resistant to the disease. In natural field nursery assessment, there was no significant difference in the frequency distributions at different disease index levels in different years for O. rufipogon and O. officinalis. The frequency and resistance stability of resistant plants in O. officinalis were obviously higher than those in O. rufipogon, which indicated that the O. officinalis species was a specific resistant type to the blast, with new type of resistance genes of important value. The study also indicated that homozygosity by selfing could significantly enhance the mean resistance level of O. rufipogon and O. officinalis. In natural field nursery assessment, the ratio of resistant plants had not significant correlation with genetic diversity in the regional population groups of O. rufipogon.

Key words: rice blast, resistance resources, Oryza rufipogon, Oryza officinalis, genetic diversity

摘要： 经过3代自交纯化与稻瘟病抗性鉴定，在1500份普通野生稻(Oryza rufipogon Griff.)中发现38份抗病材料，在113份药用野生稻(O. officinalis Wall. ex Watt.)中发现18份抗病材料。普通野生稻和药用野生稻相同材料在不同年份的田间病区诱发鉴定中，各级抗性植株分布差异不显著，鉴定结果表现一致。与普通野生稻相比，广西药用野生稻抗性基因发生的频率显著较高、抗性稳定，是一种特殊抗性类型，从中获得具有重要利用价值的新抗性基因的可能性较大。研究还表明，自交提纯能够明显提高这两种野生稻的平均抗性水平。在田间病区诱发条件下，广西普通野生稻抗性材料出现的频率与地区居群的遗传多样性没有显著相关性。

关键词: 稻瘟病, 抗性资源, 普通野生稻, 药用野生稻, 遗传多样性

WEI Yanping,HUANG Dahui,CHEN Yingzhi,LIU Chi,YANG Lang,LUO Xuemei,MA Zengfeng,ZHANG Yuexiong,LIU Yali,YANG Xinqing,LI Rongbai,. Identification and Evaluation of Resistance to Rice Blast in Guangxi Wild Rice Resources[J]. Chinese Journal of Rice Science, DOI: 10.3969/j.issn.1001-7216.2009.04.15 .

韦燕萍黄大辉陈英之刘驰,杨朗罗雪梅,马增凤张月雄,. 广西野生稻资源抗稻瘟病材料的鉴定与评价[J]. 中国水稻科学, DOI: 10.3969/j.issn.1001-7216.2009.04.15 .

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Identification and Evaluation of Resistance to Rice Blast in Guangxi Wild Rice Resources

广西野生稻资源抗稻瘟病材料的鉴定与评价

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