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|標題:||番茄晚疫病A2菌株配對型再確定、疫區標定及追蹤防除||作者:||柯文雄, 劉瑞芬,安寶貞||關鍵字:||Phytophthora Infestans;晚疫病;植物保護類;Mating Type;Genotype;配對型;基因型;應用研究||摘要:||
Late blight induced by Phytophthora infestans is a very important disease causing severe economic loss to the potato and tomato industry in the world. However, the disease hardly appeared in lowland areas in Taiwan before 1997. But potato late blight dramatically broke out at Holi, Taichung, the major potato cultivation areas, at the end of the year. The disease rapidly spread throughout covering most of potato and tomato fields in Taiwan within a short period of time. Thereafter the notorious disease becomes endemic and epidemic in Taiwan, and results in serious loss to many farmers every year. Results showed that the genotype of the old strains of P. infestans distributed in Taiwan before 1997 belong to US-1 whereas the new strains appearing afterwards belong to US-11. Both old and new strains are of A1 mating type. Meanwhile, the new strain already become dominant and almost completely replaced the old one. It is suspected that the new strain is an invasive pathogen which came along with the imported potato tubers from USA and established in Taiwan under suitable environment conditions. Recently a report indicated that A2 mating type of US-11 already occurred in Taiwan. Therefore the purpose of the research program is to clarify that whether the A2 mating type of P. infestans really exists in Taiwan. Diseased samples will be collected periodically from the original areas reportedly appearing A2 mating type. The isolates from original areas and other places will be analysed for mating type, metalaxyl resistance, RG57 fingerprinting, and mitochondrial DNA (mtDNA) haplotype.
|Appears in Collections:||生命科學系所|
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