黄瓜品种高原适应性评价体系研究OA

[Objectives]This study aimed to establish a plateau adaptability evaluation system for cucumber varieties,and identify those suitable for cultivation in plateau areas,thereby promoting the development of the vegetable industry in the Lhasa region.[Methods]Fourteen cucumber varieties(C1-C14),including those of the North China type,South China type,and European greenhouse type with good comprehensive traits were preliminarily selected as experimental materials.The study was conducted at the Qushui County planting base of the Lhasa Plateau Biology Research Institute.Nine indexes related to cold tolerance at the seedling stage,including growth and physiological factors,and 23 indexes related to plant traits,fruit traits,and yield at the adult stage were evaluated.Principal component analysis and membership function analysis were applied for comprehensive evaluation,and clustering analysis was used for classification.An adaptive evaluation system for cucumber varieties in plateau conditions was established.[Results]Following a 4℃low-temperature treatment,most North China type cucumber varieties exhibited moderate cold tolerance at the seedling stage,with comprehensive scores ranging from 0.15 to 0.43.In contrast,South China type and European greenhouse type cucumber varieties demonstrated stronger cold tolerance,with comprehensive scores of 0.76 and 0.61 for C11 and C14,respectively.In the adaptability trial at the adult stage,most North China type varieties had higher yields but weaker adaptability at the adult stage.The European greenhouse type variety C14 displayed excellent flavor,vigorous growth,and strong disease resistance,making it well-suited to the local growing conditions.The South China type variety C11 exhibited the highest soluble sugar content,maximum hardness,and was fully female.Based on cold tolerance at the seedling stage,the varieties were classified into three levels,with C11 and C14 showing strong cold tolerance.Based on adaptability at the adult stage,the varieties were also classified into three levels,with C14 exhibiting the best adaptability.[Conclusions]A comprehensive plateau adaptability evaluation system for cucumber varieties,covering both seedling and adult stages,was established.The European greenhouse type variety C14 and the South China type variety C11,which performed outstandingly in the evaluation,were selected for promotion in plateau regions,thereby facilitating the upgrading of local dominant varieties.