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Effect of vegetative incomtibility on double stranded RNA and mycovirus transmission In gaeumannomyces graminis var. tritici
Abstract
The vegetative incompatibility of gaeumannomyces graminis ( wheat plant pathlogen) was examined by physical interacrion of field isolates on potato dextrose agar. Due to multi-alaelic system 31 isolates of gaeumannomyces graminis var. tritici. Were divided into 18 vegetative incvompatibility (V.C) groups. The genetic mechanism of of somatic incompatibility appears to be heterogenic . fusion incompatibility was rarely found. The dsRNA components from these isolates belonged to different V-C group e.g. 38 (V- Cgroup A) and 43 (V-C group B) are of the same size. Similarly dsRNA components from isolates 87-1 ( V-Cgrouop F) and isolates 83 (V-C group G) have same size range . the close similarity of the dsRNA present in isolates from diferetn V-C group suggests that somatic incompatibility cannot restrict the ransmission of virus or viral genome (dsRNA ).
