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Cymbidium mosaic virus (CymMV) and Odontoglossum ringspot virus (ORSV) are common viruses in Phalaenopsis production, and monitoring CymMV and ORSV of in vitro seedlings is the foundation of high-quality and healthy seedling production in Phalaenopsis. In this study, 20 Phalaenopsis cultivars were used as the research objects. Two batches of in vitro seedlings selected from the production line with 10-month intervals between the subculture proliferation cycles, were investigated for CymMV and ORSV through RT-PCR (reverse transcription polymerase chain reaction) and RT-qPCR (real time quantitative polymerase chain reaction) at the same time. RT-PCR results showed that the positive rate of CymMV in the first and second batch was 25% and 20%, respectively, and the positive rate of ORSV was both 15% in the two batches. RT-qPCR results showed that the positive rate of CymMV in the first and second batch was 100% and 91.67%, respectively, and the positive rate of ORSV in the two batches was 50% and 25%, respectively. Comparing with the first batch, CymMV content of 16 cultivars and ORSV content of 9 cultivars decreased in the second batch, but ORSV content of Phalaenopsis Sogo Yukidian V3 increased significantly, which increased from negative to 6.85×105-8.50×105 copies/μL. The results indicated that CymMV and ORSV widely existed in in vitro seedlings of Phalaenopsis, and the content varied with different batches. The cultivars detected as the negative also faced the risk of virus content increase. Thus, CymMV and ORSV should be investigated regularly in the production of in vitro Phalaenopsis seedlings to ensure the high-quality seedling source for Phalaenopsis industry.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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