枇杷属植物落黄叶片颜色遗传多样性分析  

Diversity Analysis of Loquat (Eriobotrya) Defoliation Color

作　　者：单幼霞 邓朝军[2,3] 胡文舜[2,3] 陈俊伟[4] 陈秀萍[2,3] 秦巧平[1] 郑少泉[2,3] 

机构地区：[1]浙江省农产品品质改良技术研究重点实验室浙江农林大学农业与食品科学学院,杭州311300 [2]福建省农业科学院果树研究所,福州350013 [3]福建省龙眼枇杷育种工程技术研究中心,福州350013 [4]浙江省农业科学院园艺研究所,杭州310021

出　　处：《园艺学报》2017年第4期755-767,共13页Acta Horticulturae Sinica

基　　金：国家自然科学基金项目(31570679);农业部热带作物种质资源保护项目(15RZZY-15);农业部物种资源保护项目(2015NWB008);浙江省果品新品种选育重大专项(2016C02052-3)

摘　　要：调查发现枇杷属(Eriobotrya)植物种质落黄叶片有红褐色、金黄色、紫红色等24种代表性色泽。通过便携式色差仪观测枇杷属10个种176份种质落黄叶片正面和背面的色泽参数,探讨落黄叶片颜色的遗传多样性特征。结果表明:(1)枇杷属植物落黄叶片正面和背面的色泽参数L、a、b值变异系数差异较大,变幅为8.65%~185.30%,Shannon’s遗传多样性指数为1.95,说明落黄叶片色泽变异多样;(2)不同种质类群间和不同来源地类群间的变异系数和Shannon’s遗传多样性指数差异均较明显,呈现出栽培驯化程度越高,落黄叶片正面和背面的b值变异系数越小和a值变异系数越大的趋势;云南、贵州、福建地区的类群多样性指数较高;(3)系统聚类将落黄叶片正面色泽划分成12组,背面分成10组,且各组内所包含的枇杷种质类型差异大;(4)L值、b值对落黄叶片正面和背面的系统聚类分析贡献率均较大,落黄叶片正面L值与背面b值呈极显著正相关;(5)落黄叶片颜色的遗传多样性可作为枇杷属植物形态学特征描述的补充,为枇杷属植物的鉴别和利用提供新的参考,对枇杷分类研究具有潜在价值。The investigation found that the defoliation color of Eriobotrya is abundant and various,including 24 kinds of representative colors such as red brown,golden yellow,purple red,etc. In this study,defoliation front and rear color parameters of 10 genera,176 materials were determined by portable colorimeter in order to reveal the diversity characteristic of loquat defoliation color. Our results showed that：（1） The coefficient range of variation（CV）of the defoliation color parameters were 8.65%–185.30%,Shannon’s diversity index reached to 1.95,which reveals the variance diversity of loquat defoliation color. （2） Shannon’s genetic diversity index and CV between different germplasm types and different origin groups were distinct obviously,color parameter a increased but b decreased with higher domestication;Shannon’s diversity index of Yunnan,Guizhou and Fuzhou groups were relatively higher than others. （3） The front colors of defoliation were divided into 12 groups,and the rear colors were divided into 10 groups by systematic cluster analysis. And there are great differences among germplasm types within these groups. （4） Color parameter L and b make a greater contribution to the systematic cluster analysis. There was a very significant correlation between color parameter L and b of defoliation front and rear color. （5） Genetic diversity of defoliation color may be the complement of morphological feature description for loquat. Our results provide new reference for the identification and utilization of loquat resources and have potential value on loquat classification.

关 键 词：枇杷属 种质资源 落黄叶片 叶片颜色 遗传多样性 

分 类 号：S667.3[农业科学—果树学]