2019年10月17日 星期四
新疆梭梭种子表型性状变异分析及相关研究
Variation analysis on seed phenotypic traits of Haloxylon ammodendron in Xinjiang and related research
2019年 第28卷 第3期 页码[26-32]
摘要

对新疆22个种源梭梭〔Haloxylon ammodendron (C. A. Mey.) Bunge〕的种子表型性状(包括种子纵径、种子横径、种形系数、种翅长、种翅宽和种子千粒质量)进行了方差分析和变异分析,在此基础上,对种子表型性状进行了相关性分析,并对22个种源进行了聚类分析。结果表明:梭梭种子表型性状在种源间存在极显著(P<0.01)差异,且各种子表型性状的遗传力较大(0.918 4~0.985 7),其中,种子横径的遗传力最大,种子纵径的遗传力最小。种子纵径、种子横径、种翅长和种翅宽的均值分别为2.10、1.17、8.75和3.73 mm,种形系数的均值为1.81,种子千粒质量的均值为2.37 g,且各种子表型性状变异系数的均值较小(1.82%~8.00%)。相关性分析结果表明:种子纵径与种子横径和种子千粒质量呈极显著正相关,与种翅长和种翅宽呈显著(P<0.05)正相关,相关系数分别为0.622、0.733、0.473和0.474;种子横径与种形系数和种子千粒质量分别呈极显著负相关和极显著正相关,相关系数分别为-0.692和0.673;种翅宽与种翅长和种子千粒质量分别呈极显著和显著正相关,相关系数分别为0.937和0.462。聚类分析结果表明:在欧氏距离10处,供试的22个种源被分成Ⅰ、Ⅱ、Ⅲ和Ⅳ 4组,分别包含10、6、2和4个种源,且部分地理分布相近的种源聚在一起,说明新疆梭梭种子表型性状地理变异呈现一定的区域板块化特征,并伴有随机变异特征。研究结果显示:新疆梭梭种子表型性状在种源间变异丰富,且这些表型性状受到较强的遗传控制,但在种源内却较稳定。

Abstract

Variance and variation analyses on  seed phenotypic traits (including vertical and horizontal diameters of seed, coefficient of seed form, length and width of seed wing, and 1 000-grain mass of seed) of Haloxylon ammodendron (C. A. Mey.) Bunge from 22 provenances in Xinjiang were conducted, on the basis, correlation analysis on seed phenotypic traits and cluster analysis on 22 provenances were conducted. The results show that there are extremely significant (P<0.01) differences in seed phenotypic traits of H. ammodendron among different provenances, and the heritability of each seed phenotypic trait is relatively large (0.918 4-0.985 7), in which, that of horizontal diameter of seed is the largest, while that of vertical diameter of seed is the smallest. The means of vertical and horizontal diameters of seed, length and width of seed wing are 2.10, 1.17, 8.75, and 3.73 mm, respectively, the mean of coefficient of seed form. is 1.81, that of 1 000-grain mass of seed is 2.37 g, and that of coefficient of variation of each seed phenotypic trait is relatively small (1.82%-8.00%). The correlation analysis result shows that there are extremely significant positive correlations of vertical diameter of seed with horizontal diameter of seed and 1 000-grain mass of seed, and significant (P<0.05) positive correlations with length and width of seed wing, with correlation coefficients of 0.622, 0.733, 0.473, and 0.474, respectively; there are extremely significant negative correlation and extremely significant positive correlation of horizontal diameter of seed with coefficient of seed form. and 1 000-grain mass of seed, with correlation coefficients of -0.692 and 0.673, respectively; there are extremely significant and significant positive correlations of width of seed wing with length of seed wing and 1 000-grain mass of seed, with correlation coefficients of 0.937 and 0.462, respectively. The cluster analysis result shows that at Euclidean distance of 10, 22 provenances tested are divided into 4 groups of Ⅰ, Ⅱ, Ⅲ, and Ⅳ, which contains 10, 6, 2, and 4 provenances, respectively, and some provenances with adjacent geographical distribution are clustered together, indicating that the geographical variation of seed phenotypic traits of H. ammodendron in Xinjiang shows a certain regional plate characteristics and is accompanied by random variation characteristics. It is suggested that there are abundant variations of seed phenotypic traits of H. ammodendron among provenances in Xinjiang, and these phenotypic traits are strongly controlled by heredity, but relatively stable within provenance.

关键词梭梭; 种源; 种子表型性状; 变异分析; 相关性分析; 聚类分析
Key wordsHaloxylon ammodendron (C. A. Mey.) Bunge; provenance; seed phenotypic traits; variation analysis; correlation analysis; cluster analysis
作者何权1,2, 蒋瑞娟1,2, 朱军1,2, 石书兵1, 李晓瑾1,2
所在单位1. 新疆农业大学农学院, 新疆 乌鲁木齐 830052; 2. 新疆维吾尔自治区中药民族药研究所, 新疆 乌鲁木齐 830002
点击量124
基金项目国家自然科学基金资助项目(U1403224)