枣种质资源表型性状的多样性分析及简化栽培综合评价OA

[Objective]By analyzing the phenotypic traits of jujube germplasm resources,this study comprehensively eval-uates their biological characteristics and adaptability to simplified cultivation,in order to screen out jujube germplasm resources suitable for simplified cultivation.[Methods]42 jujube germplasm resources were used as test materials.29 phenotypic traits related to simplified cultivation were determined and analyzed,including tree shape,high-yield potential,growth vigor,fruit quality,and fruit texture.[Results]The results showed that the range of the 29 indicators varied from 0.23%to 100%,and the coefficient of variation(CV)ranged from 7.12%to 98.12%.Fruit cohesiveness had the smallest CV,while the fruit cracking rate had the largest CV.Fourteen traits,main branch length,main branch diameter,main branch internode length,secondary branch length,secondary branch diameter,secondary branch internode length,stocks Number in secondary branch,Number of fruit shoot,Average fruit weigh,cohesiveness,gumminess,fruit peel hardness,and fruit pulp hardness,con-formed to a normal distribution.The 42 jujube germplasm resources were divided into 7 groups at a squared Euclidean distance of 75.Germplasms from different geographical origins did not show obvious clustering characteristics,indicating minor differ-ences among resources from different regions.Principal component analysis extracted 8 principal components with a cumulative contribution rate of 79.45%.Using membership function calculations,ten resources were ultimately screened:Jincheng 1,Lengbaiyu,Jin'ai 3,Dayuanfeng,Guoguang,Lizao,Shizao 3,Zaocuiwang,Tailihong,and Guantanzao.These resources ex-hibit good fruit quality,high yield potential,robust tree shape,moderate growth vigor,and are suitable for simplified cultiva-tion.[Conclusion]This study explored resource evaluation methods for simplified cultivation and also reserved suitable germ-plasm resources for further research on simplified cultivation models.