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Molecular characterization of Chinese Hop stunt viroid isolates reveals a new phylogenetic group and possible cross transmission between grapevine and stone fruits |
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| Authors: | Zhixiang Zhang Ying Zhou Rui Guo Lingxiao Mu Yuanai Yang Shifang Li Hongqing Wang |
| Institution: | 1. State Key Laboratory of Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Yuanmingyuan West No. 2, 100193, Beijing, China 2. Institute of Plant & Environment Protection, Beijing Academy of Agricultural and Forestry Sciences, 100093, Beijing, China 3. Department of Fruit Science, College of Agronomy and Biotechnology, China Agricultural University, 100193, Beijing, China |
| Abstract: | A survey for the incidence of Hop stunt viroid (HSVd) infection in China was conducted using dot-blot hybridization. Out of 553 tested samples, 127 samples of stone fruits (apricot, peach, plum and almond), grapevine and hop were positive for HSVd, giving a mean infection rate of 23?%. Phylogenetic analysis revealed that most of the HSVd variants isolated from stone fruits, grapevine and hop were clustered into known hop and plum groups. However, two grapevine variants, HSVd.g50 and HSVd.g57, could not be clustered into any known groups, indicating a previously unknown phylogenetic group of HSVd isolates. HSVd.g38 was the single grapevine variant that clustered with the plum group isolates, supporting cross transmission between grapevine and stone fruits and the heterogeneity of grapevine isolates. |
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