c3518cb17d976b8
نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی دکتری، بیماریشناسی گیاهی، دانشکده کشاورزی، دانشگاه زابل
2 دانشیار، گروه زیستشناسی، دانشکدۀ علوم، دانشگاه یزد
3 دانشیار، بیماریشناسی گیاهی، دانشکده کشاورزی، دانشگاه زابل
4 استادیار، بیماریشناسی گیاهی، دانشکده کشاورزی، دانشگاه زابل
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In this research, genetic diversity and pathogenicity of Paecilomyces formosusisolates, causal agent of die-back disease of pistachio trees in Yazd and Khorasan Razavi provinces were investigated. Genetic diversity of 50 selected isolates using SSR markers, showed a high degree of polymorphism between isolates. Cluster analysis based on UPGMA algorithm and Jaccard's similarity coefficient, divided the isolates into 11 groups with 75% similarity level. Shannon index, Principal coordinates analysis (PCoA) and analysis of molecular variance (AMOVA) revealed that the highest genetic variation (81%) was disturbed among isolates and genetic variation within isolates was determined as 19%. Between used primers, PVar15 was more appropriate than others to study of genetic diversity of isolates. Study of pathogenicity test and mean comparison mean of data showed that isolates of Mehriz and Abarkoh regions in Yazd province had the most and lowest aggressive isolates, respectively. Our results indicated that there is a specific relationship between the isolates of each region whereas no relationship was identified between related isolates belongs to two provinces and their genetic diversity.
کلیدواژهها [English]