摘要
以贵州23个野生毛桃的果核为试验材料，对其6个数量性状（果核重、横纵径、核形指数、核尖长、核厚度）和4个质量性状（果核核形、鲜核颜色、核粘离性、核面光滑度）进行了分析，以揭示其遗传多样性。结果表明：（1）贵州野生毛桃资源的果核数量性状的变异较丰富，具有丰富的遗传多样性。其中果核重变异系数最大为33．08％，变异幅度为0．65～4．38g，核形指数变异系数最小为7．56％。（2）果核形态的观测发现，核形、鲜核颜色和核粘离性有不同程度的差异，其核形有卵圆、倒卵圆和椭圆3种类型；鲜核颜色为浅棕、棕和深棕3种类型；核粘离性为离核、半离核和粘核3种类型；核面光滑度差异不大均为较粗糙类型。（3）果核性状间果核重与果核横径、果核纵径和果核厚度呈极显著正相关，核形指数与核形和核尖长呈显著正相关关系。（4）主成分分析结果显示，果核数量特性、果核形状特性、果核物理特性3个主成分的累计贡献率达到84．01％，基本概括果核性状的主要信息。（5）聚类分析显示，23个野生毛桃样品可划分为5类，其中‘晴隆-1’、‘普安-5’单独划为一类，表明其具有完全不同的遗传背景。
In order to reveal the genetic diversity oi witd peact,we conaucLeu an experiment to analyze the 6 quantitative characters （weight of stone, transverse and vertical length, stone shape index, stone tip length, thickness） and 4 qualitative characters （stone shape, color, freestone, surface smoothness） of 23 wild peaches from Guizhou Province, China. The results showed that ： （1） There was abundant in genetic diversity on the stone quantitative characters of wild peaches in Guizhou. The range of variation of the weight of stone was 0.65 to 4.38 g with the highest coefficient of variation of 33.08%,and the coefficient of variation of stone shape index was as low as 7.56%. （2）There were differences in stone shape,color,freestone by observing the stone morphology. The stone shape was ovate,obovate or oblong;the color was light brown, brown or dark brown;the freestone was free, semi-free or cling. The surface smoothness of stone had smal-ler range of variation, they were intermediate. （3）Correlation analysis among stone traits showed that weight of stone was definitely notable positive correlated to transverse length, vertical length, thickness;stone shape index was notable positive correlated to stone shape and stone tip length. （4）Principal component analysis indicated that the cumulative percentage of the former three main factors reached to 84.01%, which basically summarized the stone traits main information. （5）Cluster analysis showed that 23 wild peach samples could be divided into five categories,the ‘Qinglong-1’and ‘pu＇an-5＇had grouped separately,which indicated that the genetic background of them were completely dissimilar to others.
出处
《西北植物学报》
CAS
CSCD
北大核心
2013年第11期2225-2231,共7页
Acta Botanica Boreali-Occidentalia Sinica
基金
贵州省科技攻关项目[黔科合农G字(2009)4003]
关键词
野生毛桃
果核
性状
wild peach
fruit core
character
作者简介
杨鑫（1987-），男，在读硕士研究生，主要从事果树种质资源与遗传育种。Email：yangxinllhao@163．com
通信作者：陈红，博士，副教授，主要从事生物技术与果树遗传育种研究工作。E—mail：chenh96@yahoo．com．cn
