Genetic analysis of Phytophthora infestans populations in the Nordic European countries reveals high genetic variability |
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Authors: | Brurberg May Bente Elameen Abdelhameed Le Vinh Hong Naerstad Ragnhild Hermansen Arne Lehtinen Ari Hannukkala Asko Nielsen Bent Hansen Jens Andersson Björn Yuen Jonathan |
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Institution: | 1. Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeoungeup, Jeollabuk-do 56212, Republic of Korea;2. College of Pharmacy, Chungnam National University, Daejeon 34134, Republic of Korea;3. Department of Horticultural and Crop Environment, National Institute of Horticultural and Herbal Science, RDA, Wanju 55365, Republic of Korea;1. College of Pharmacy, Drug Research and Development Center, Daegu Catholic University, Gyeongbuk 38430, Republic of Korea;2. College of Pharmacy, Research Institute of Pharmaceutical Sciences, Kyungpook National University, Daegu 41566, Republic of Korea |
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Abstract: | Late blight, caused by the oomycete Phytophthora infestans, is the most important disease of potato (Solanum tuberosum). The pathogen is highly adaptable and to get an overview of the genetic variation in the Nordic countries, Denmark, Finland, Norway and Sweden we have analyzed 200 isolates from different fields using nine simple-sequence repeat (SSR) markers. Forty-nine alleles were detected among the nine SSR loci and isolates from all four Nordic countries shared the most common alleles across the loci. In total 169 multilocus genotypes (based on seven loci) were identified among 191 isolates. The genotypic diversities, quantified by a normalized Shannon's diversity index (H(s)), were 0.95 for the four Nordic countries. The low F(ST) value of 0.04 indicates that the majority of variation is found within the four Nordic countries. The large number of genotypes and the frequency distribution of mating types (60% A1) support the hypothesis that sexual reproduction is contributing notably to the genetic variation of P. infestans in the Nordic countries. |
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