文献类型： 外文期刊
作者： Qiu, X. Q. 1 ; Jian, H. Y. 2 ; Wang, Q. G. 2 ; Zhou, N. N. 2 ; Chen, M. 2 ; Zhang, H. 2 ; Tang, K. X. 2 ;
作者机构： 1.Huazhong Agr Univ, Minist Educ, Key Lab Hort Plant Biol, Coll Hort & Forestry, Wuhan 430070, Peoples R China
2.Yunnan Acad Agr Sci, Flower Res Inst, Yunnan Flower Breeding Key Lab, Kunming 650205, Peoples R China
关键词： rose species;Podospherapannosa;fungal races;plant resistance;breeding
期刊名称：VI INTERNATIONAL SYMPOSIUM ON ROSE RESEARCH AND CULTIVATION
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年卷期：
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收录情况： SCI
摘要： Powdery mildew caused by Podosphera pannosa is a major disease of roses causing large amount of losses especially in greenhouse production. To identify the powdery mildew resistance of wild Rosa species for providing resistant genetic resources for rose disease-resistant breeding, we evaluated 50 accessions from nine botanical sections, including nine ancestor species of modern roses and ten endemic species to China, by a spore-suspension inoculation method. With a set of fifty different Rosa genotypes, all five tested isolates from diverse host genotypes could be identified as different races. The results showed that six genotypes R. laevigata, R. longicuspis, R. luciae, R. banksiae and its two varieties were immune to P. pannosa. Twelve accessionsof section Pimpinellifoliae, R. rubus, R. rugosa, etc. were highly resistant to this pathogen. The results indicated that the three sections Pimpinellifoliae, Laevigatae and Banksianae were obvious more resistant to P. pannosa than others. The immunizedand highly resistant species were characterized either by thick and shiny young leaves or by rugose young leaves with prominent veins. The study provides useful information for utilizing these resistant germplasm in rose disease-resistant gene isolation and new cultivar breeding.
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