Study on the Comparison and Evaluation of the Growth Differences of 8 Bletilla formosana Provenances from Yunnan Province

【Objective】The present study explored the phenology and growth regularity of Bletilla formosana from different provenances in order to provide candidate germplasm resources for landscaping as well as the development and utilization of B. formosana products.【Method】By taking 313 stains of B. formosana from 8 different provenances in Yunnan Province as the research objects, the growth indexes such as their phenology and plant height, ground diameter, leaf number, leaf length, leaf width and length-width ratio were compared and the germplasm resources of B. formosana were evaluated by the principal component analysis and comprehensive index method.【Result】The variation of B. formosana germplasm resources was rich in Yunnan Province. The germination and flowering time of B. formosana of different provenances were various. There were extremely significant differences in plant height, leaf number, leaf length and length-width ratio of different B. formosana provenances, and there were significant differences in ground diameter,while there was no significant difference in leaf width.【Conclusion】The Xiaojianshan provenance had the earliest germination and the longest florescence, which sprouted in mid-March with a florescence of 75d, and this provenance could be used as a candidate for landscaping germplasm. The provenances in Sanjiaoshan and Xiaomesuo, with fairly good growth indexes, got the comprehensive evaluation scores of 4.822 and 1.687 respectively and could be used as excellent germplasm resources for further research on multi-point test, parental selection, hybridization and family determination .