200份梨资源萼片表型性状评价
Sepal Phenotypic Evaluation of 200 Pear Germplasm Resources
摘要
Abstract
To understand sepal trait diversity and their impact on fruit appearance,this study investigated the diversity,correlation and clustering analysis of sepal traits in 200 pear germplasm resources.Results showed a U-shaped distribution of calyx abscission rates,with higher number of germplasm resources in extremely high and low rate groups.The sepal development process was divided into three stages:before(2-4 days after flowering),during(5-7 days after flowering),and after(8-10 days after flowering)abscission zone formation.Persistent and residue calyx germplasm resources exhibited aggregated and upright calyx postures.In Oriental Pear(including Pyrus bretshneideri Rehd.,P.ussuriensis Max.,Ppyrifolia Nakai,P.sinkiangensis Yü,hybrid breeding varieties),calyx-shedding fruit generally has no calyx convex,and the calyx convex on the persistent calyx fruit has little effect on fruit shape.The thickness and area of sepals varied greatly among different germplasm resources,although these characters did not reveal effect on fruit shape.Among 14 germplasms of P.communis L.,sepals are generally thin and small,with little effect on fruit shape.Analysis of persistent calyx abnormal fruit identified 33 varieties with varying degrees of abnormality,mainly oblique and protruding calyx fruit.The residual calyx abnormal fruit was oblique,indicating that sepal appearance affects fruit shape but is not the sole factor.Correlation analysis found extremely significant negative correlations between calyx abscission rates and calyx convexity.Cluster analysis divided these germplasm resources into four categories mainly based on calyx shedding rate(80.7％-100.0％,16.6％-40.2％,45.5％-78.5％,0-11.9％).These findings provide a reference for pear germplasm resource utilization and variety breeding.关键词
梨/萼片/果实品质/脱萼率Key words
pear/sepals/fruit quality/calyx abscission rate引用本文复制引用
解亚容,张向展,王亚楠,杨健,王龙,王苏珂,苏艳丽,郝峰鸽,薛华柏..200份梨资源萼片表型性状评价[J].植物遗传资源学报,2025,26(5):891-904,14.基金项目
河南省重点研发项目(241111113500) （241111113500）
云南省重大科技专项计划(202302AE090005) （202302AE090005）
国家自然科学基金(32202439) （32202439）
河南省重大科技专项(221100110400) （221100110400）
国家现代农业产业技术体系项目(CARS-28) （CARS-28）
中国农业科学院科技创新工程项目 （）
河南省科技攻关项目(232102110180) （232102110180）
河南省国际科技合作项目(242102521063)Key Research and Development Project of Henan Province(241111113500) （242102521063）
Major Science and Technology Project of Yunnan Province(202302AE090005) （202302AE090005）
National Natural Science Foundation of China(32202439) （32202439）
Major Science and Technology Projects of Henan Province(221100110400) （221100110400）
Earmarked Fund for China Agriculture Research System(CARS-28) （CARS-28）
Agricultural Science and Technology Innovation Program of Chinese Academy of Agricultural Sciences （）
Henan Province Science and Technology Research Project(232102110180) （232102110180）
International Science and Technology Cooperation Project of Henan Province(242102521063) （242102521063）
