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Areca palm leaf yellowing virus disease, caused by Areca palm velarivirus 1 (APV1), is a fatal disease for which no effective control measures currently exist. Breeding resistant or tolerant varieties is the key approach to addressing this issue, while the collection of superior germplasm resources is an essential foundation for breeding efforts. This study focused on three major affected areas in Hainan Province (Tunchang, Qionghai, and Wanning) and systematically conducted research activities including germplasm collection, phenotypic observation, pathogen detection, and long-term monitoring. The results revealed that among the 200 areca palm germplasm materials collected, 84 out of 100 resistant/susceptible materials did not show the presence of APV1, while 92 out of 100 susceptible materials tested positive for APV1. This finding confirmed a close association between APV1 infection and plant yellowing symptoms, and demonstrated that the screened resistant/tolerant materials are representative. Through continuous observation and correlation analysis, a significant negative correlation was found between tree age and resistance/tolerance to the disease. This study successfully identified a group of betel palm germplasm resources with resistance/tolerance traits, laying a crucial foundation for the development of disease-resistant varieties in future breeding programs.
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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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