Population structure of Phytophthora infestans in China – geographic clusters and presence of the EU genotype Blue_13 |
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Authors: | Y. Li T. van der Lee J. H. Zhu G. H. Jin C. Z. Lan S. X. Zhu R. F. Zhang B. W. Liu Z. J. Zhao G. Kessel S. W. Huang E. Jacobsen |
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Affiliation: | 1. Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, , 100081 Beijing, China;2. Plant Research International, , 6700 AA Wageningen, the Netherlands;3. Hebei Agricultural University, , 071001 Baoding, China;4. Heilongjiang August First Land Reclamation University, , 163319 Daqing, China;5. Fujian Academy of Agricultural Sciences, , 350003 Fuzhou, China;6. Wageningen University and Research Centre, , 6708 PB Wageningen, the Netherlands;7. Inner Mongolia University, , 010021, Hohhot, Inner Mongolia, China;8. Sichuan Academy of Agricultural Sciences, , 610066 Chengdu, China;9. Yunnan Academy of Agricultural Sciences, , 650231 Kunming, China |
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Abstract: | The population structure of Phytophthora infestans in China was studied and three mitochondrial haplotypes (Ia, IIa, IIb) were observed. Genetic analysis with 10 highly informative SSR markers identified 68 different genotypes, including three dominant clonal lineages. In the Chinese P. infestans population, the genotypes were strongly clustered according to their geographic origin. One of dominant clonal lineages was genetically similar to Blue_13, a dominant clonal lineage found in Europe since 2004. This is the first report of Blue_13 outside Europe. Only one mating type (A1) was found in the northern and southeastern provinces, but in southern and northwestern China both mating types were observed. The mating type ratio and SSR allele frequencies indicate that in China the sexual cycle of P. infestans is rare. These results emphasize that the migration of asexual propagules and the generation of subclonal variation are the dominant driving factors of the population structure of P. infestans in China. They may also have implications for the role of monitoring P. infestans populations in potato late blight management strategies in China. |
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Keywords: | Blue_13 China clonal lineage genotyping late blight population structure |
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