“t”检验法则在闽北抗寒速生邓恩桉优株筛选的应用  

Application of"t"Determination Principle in Selection of Eucalyptus dunnii Elite Trees with Cold-resistant and Rapid-growth Genotypes in Northern Fujiang,China

作　　者：郭祥泉[1] 洪伟[1] 吴承祯[1] 洪滔[1] 林晗[1] 

机构地区：[1]福建农林大学桉树研究中心,福州350002

出　　处：《应用与环境生物学报》2009年第3期385-389,共5页Chinese Journal of Applied and Environmental Biology

基　　金：福建省财政厅重大科研专项基金资助~~

摘　　要：用材林优株筛选通常应用"11株标准木与5株优势木法",但在选择上,优良单株的选择标准确定存在主观性,所筛选的优良单株需反复试验,才能得到目的优良遗传性状,所需时间长.本文利用大样本调查方法,通过对引种地1～4a生实生苗造林的邓恩桉不同林分优良单株进行预选.在不同年龄林分中,以预选的优势木为中心,依据早期林分各生长性状呈正态分布规律,利用正态分布的"t"检验法确定优株筛选的选择标准,应用所确定的选择标准筛选抗寒速生优株.从1～4a生林分中分别筛选得优株6、5、2、2株,与优株所在林分平均值比较,1～4a生树高分别增长90.5%、39.0%、45.2%、61.5%以上,2～4a生胸径分别增长37.9%、81.2%、73.3%以上,2～4a生材积分别增长134%、378%、339%以上.该方法是基因重组的突变理论与数理统计的异常数据剔除法的综合,能一次性检验获得突变优良遗传性状,克服了上述两种方法的主观性,大大缩短了选择时间,提高了优良性状的利用率.该方法系本文首次提出并称作"t"检验选择法,在用材林优株筛选应用上具有良好的指导价值.The method of ＂11 standard trees and 5 dominant trees ＂ was generally applied in selection of the elite trees from timber stands. However, there existed the subjectivity in the selection criterion of the elite individuals and the elite genetic characters needed to be selected again and again after the elite individuals were selected, and therefore a large amount of time would be ~pent. In this paper, Eucalyptus dunnii dominant trees with cold-resistant and rapid-growth genotypes were primarily selected in different stands in introducing areas from 1 to 4 years by large samples method. The primarily selected dominant trees were regarded as investigation center in different stands and the selection criterion of elite trees was determined by applying ＂t＂ determination principle according to the normal distribution rule of growth characters of forest individuals in stands and E. dunnii elite trees with cold-resistant and rapid-growth were selected with the selection criterion having been determined by ＂t＂ determination principle. 6, 5, 2 and 2 elite trees were selected from 1 to 4 years stands, respectively. The growth characters of those selected elite trees were better than the average of all the stands, height of the selected elite trees increased by over 90.5%, 39.0%, 45.2%, 61.5% from 1 to 4 years stands, their breast diameter increased by over 37.9%, 81.2%, 73.3% and their volume of timber increased by over 134%, 378%, 339% from 2 to 4 years stands, respectively. The method was reformed by mutative theory of gene recombination of plant and ＂t determined rule＂ of normal distribution of mathematics statistics, which could make the mutative elite genetic characters be determined once. This method overcame the subjectivity of the above two selection methods and greatly shortened the selection time. This paper first proposed and named the method of＂t＂ determination principle, which is a useful tool for selection of elite trees from timber stands.

关 键 词：邓恩桉 “t”检验法则 优株筛选 正态分布 

分 类 号：S792.390.4[农业科学—林木遗传育种]