Variation and Probability Grading of Fruit Firmness in Peach Germplasm Resource  

桃种质资源果实硬度评价及概率分级(摘要)(英文)

作　　者：马之胜[1] 王越辉[1] 贾云云[1] 宣立锋[1] 王建学 

机构地区：[1]河北省农林科学院石家庄果树研究所,河北石家庄050061 [2]河北省藁城市林业局,河北藁城052160

出　　处：《Agricultural Science & Technology》2009年第6期91-93,共3页农业科学与技术（英文版）

基　　金：Supported by National Science and Technology Support Plan Project(2008BAD92B02);the Earmarked Fund for Modern Agro-industryTechnology Research System(nycytx-31-zs-4)~~

摘　　要：Objective The aim was to provide basis for further studies on fruit firmness in peach fruits and the standardization and standardization of peach germplasm resource. [ Method] The analysis of fruit firmness of peach germplasm resource was based on the improved firmness measurement, and the probability grading of characteristics was carried out on peach fruit firmness. [Result] The coefficient of variation of peach fruit firmness with skin was less than that of fruit firmness without skin; the fruit firmness with skin and fruit firmness without skin were both fitted the normal distribution; the probability grading of characteristics were divided into five series based on four points of （X-1. 281 8s）, （X-0. 524 6s）, （X＋0. 524 6s） and （X＋1.281 8s）, so that the probability of 1 -5 were 10%, 20%, 40%, 20% and 10%. [Conclusion] There was more abundant genetic basis in fruit firmness, which held a potential for greater choice.[目的]研究果实硬度的变异特征及果实硬度的分级标准,为桃果实硬度的深化研究及桃种质资源描述的规范化和标准化提供依据。[方法]用改进的果实硬度计测定果实胴部的带皮硬度和去皮硬度。统计所有品种(系)果实硬度的平均值、标准差和变异系数,将各性状的取值从小到大进行排序,然后各自以0.5～1.0倍于标准差的级差等分为7级,统计落入各级的品种(系)数、进而用Nonparametric test-1-sample K-S检验桃果实硬度是否符合正态分布。对符合正态分布的性状,根据(X-1.281 8 s)、(X-0.524 6 s)、(X+0.524 6 s)、(X+1.2818 s)4个点可以分为5级,使1～5级出现概率分别为10%、20%、40%、20%和10%。其中X代表硬度的平均值,s代表标准差。[结果]带皮硬度的变异系数小于去皮硬度,说明果实带皮硬度除去皮硬度之外,果皮的变异也较大。带皮硬度是去皮硬度的近2倍。带皮硬度和去皮硬度的Sig值分别为0.08和0.279,均大于0.05,说明带皮硬度和去皮硬度均符合正态分布。为便于记忆和推广应用,对计算所得理论分点值进行了规范化调整。原则和方法是:每个分点值的"舍"、"入"值不得超过相应标准差的1/10,调整前后的分点值尽可能的概率变化不超过2%,调整后的分点值尽可能好记,第1、2和第3、4分点值之差相等。调整后的概率分级标准为:带皮硬度1～4级分值点分别为12.0、18.0、24.0、30.0 kg/cm^2:去皮硬度1～4级分值点分别为4.0、8.0、12.0、16.0 kg/cm^2。[结论]该研究中桃果实硬度的变异系数较大,说明果实硬度具有较丰富的遗传基础,蕴藏着较大的选择潜力。

关 键 词：Peach germplasm Fruit firmness VARIATION Probability grading 

分 类 号：S662.1[农业科学—果树学]