5年生木荷生长和形质性状的家系变异和选择  

Family Variation and Selection of Growth and Quality Characteristics of 5-Year-Old Schima superba Seedlings

作　　者：辛娜娜[1,2] 张蕊[1] 范辉华[3] 陈康 徐有明[2] 周志春[1] 

机构地区：[1]中国林业科学研究院亚热带林业研究所,浙江富阳311400 [2]华中农业大学园艺林学学院,湖北武汉430070 [3]福建省林业科学研究院,福建福州350012 [4]江西省永丰县官山林场,江西永丰331500

出　　处：《林业科学研究》2014年第3期316-322,共7页Forest Research

基　　金：国家“十二五”科技支撑计划课题(2012BAD01B04);国家林业公益性行业科研专项重大项目(201104001);浙江省竹木农业新品种选育重大科技专项竹木育种协作组项目(2012C12908-6);福建省林木种苗科技攻关第四期项目木荷课题

摘　　要：利用2008年营建于福建建瓯和江西永丰两地点近140个木荷优树家系的遗传测定林,研究5年生木荷生长和形质性状的家系遗传变异规律及家系与地点的互作,并初选出一批速生优质家系。方差分析结果显示,5年生木荷生长和形质性状在家系间的遗传差异均达到极显著水平;除第3组的最大分枝角性状外,木荷生长和形质性状也存在显著的家系×地点互作效应。性状遗传力估算值显示,树高、胸径和冠幅在两地点的家系遗传力估算值均较高,其变化在0.36 0.87间,受中等偏强的遗传控制,而树干通直度和分枝性状的家系遗传力估算值相对略低,受中等偏弱的遗传控制。性状相关分析显示,木荷家系树高、胸径和冠幅间呈极显著的遗传正相关,遗传相关系数在0.572 0.928间。最大分枝粗与树高和胸径也呈极显著遗传正相关,说明对速生的木荷家系须加强早期修枝,以培育优质的干材。以树高为选择标准,在福建建瓯和江西永丰两地点分别初选出24个和17个早期速生优良家系。The family tests including about 140 Schima superba families at the age of five were conducted at Jian＇ ou of Fujian and Yongfeng of Jiangxi to reveal the genetic variation and the interaction of family and site for the growth and stem form quality characteristics. The result of variance analysis showed that there existed significant differences in growth and stem form quality characteristics among the families tested. The differences in the interaction effect of family and site were also significant except for the biggest branch angle in the third group. The tree height, DBH and crown width in two locations were under moderate to strong genetic control, and the family heritability was 0.36 - 0.87. The family heritability of other characteristics were relatively low in the overall level and under moderate to weak genetic control. There was an extremely significant positive correlation among tree height, DBH, and crown width. The genetic correlation coefficient was 0. 572 -0. 928. The biggest branch size also had an extremely significant positive correlation with tree height and DBH, so it is needed to strengthen the pruning in the early period of forest management to cultivate high quality timber. Based on the tree height, 24 Schima superba families from Jian＇ ou of Fujian and 17 families from Yongfeng of Jiangxi were selected as early-fast-growing families.

关 键 词：木荷 家系 生长 形质 变异 选择 

分 类 号：S722.5[农业科学—林木遗传育种]