文献类型：期刊文献

中文题名：10年生香椿生长与形质性状的种源变异及选择

英文题名：Provenance variation and selection in growth, shape, and quality traits of 10-year-old Toona sinensis

作者：沈汉[1] 郑成忠[1] 邱勇斌[1] 汪清华[2] 华克达[3] 缪强[3] 范艳如[4] 姜景民[4] 韦一[4] 刘军[4]

第一作者：沈汉

机构：[1]开化县林场,浙江开化324300;[2]浙江省开化县林业局,浙江开化324300;[3]浙江省杭州市富阳区农业农村局,浙江杭州311400;[4]中国林业科学研究院亚热带林业研究所,浙江杭州311400

年份：2024

卷号：41

期号：3

起止页码：597-605

中文期刊名：浙江农林大学学报

外文期刊名：Journal of Zhejiang A&F University

收录：CSTPCD;;北大核心:【北大核心2023】；CSCD:【CSCD2023_2024】；

基金：国家重点研发计划项目(2021YFD2200305);中央级公益性科研院所基本科研业务费专项(CAFYBB2020SZ004)。

语种：中文

中文关键词：香椿;遗传变异;纬度变异;温度;种源区

外文关键词：Toona sinensis;genetic variation;latitude variation;temperature;provenance zone

分类号：S722

摘要：【目的】通过分析10年生香椿Toona sinensis生长与形质性状的种源变异,揭示不同性状在地理种源上的变异规律,并进行种源区划及优良种源选择。【方法】以浙江开化县林场的10年生香椿种源林为试材,测定其树高、胸径、枝下高、冠幅、材积、树干圆满度和树冠圆满度,获取各种源生态环境因子,进行方差、主成分、相关性和聚类等分析,计算广义遗传力、综合选择指数和遗传增益,阐明生长和形质性状地理变异模式及与产地生态因子关系。【结果】树高、胸径、树干圆满度和材积存在极显著(P<0.01)种源差异,种源胸径、树高、冠幅、枝下高和材积呈典型的纬向变异模式。种源胸径与冠幅、枝下高和材积之间均呈极显著(P<0.01)正相关。胸径与产地年平均气温、最冷月平均日最低气温和最干燥季节日平均气温等显著(P<0.05)正相关。根据种源聚类结果,可将香椿划分为南部和北部2个种源区,并筛选出3个优良种源,分别为元谋、恩施和太和。【结论】10年生香椿种源间差异显著,并且树高、胸径、材积等性状存在从南向北逐渐减小的变异规律,对其进行选择时胸径是主要的遗传改良性状,可为材用型香椿良种选择提供可靠依据。
[Objective]The purpose of this study is to examine the provenance variations in growth,shape and quality traits of 10-year-old Toona sinensis,to reveal the variation of different traits in geographical provenance,and to carry out provenance division and selection.[Method]Using the 10-year-old T.sinensis provenance test in Kaihua County,Zhejiang Province as material,the tree height,diameter at breast height(DBH),height under the branch,crown width,volume,trunk completeness,and crown completeness were measured,and various ecological and environmental factors were obtained.Variance,principal component,correlation,and cluster analysis were applied to calculate the general heritability,comprehensive selection index,and genetic gain to elucidate the geographical variation patterns of growth, shape, and quality traits and their relationship with ecological factors of different origin. [Result] There were significant provenance differences (P<0.01) in tree height, DBH, trunk completeness, and volume. The DBH, tree height, crown width, height under branches, and volume of the provenances displayed typical zonal variation patterns. There was a highly significant positive correlation (P<0.01) between DBH and crown width, height under branches and volume. DBH was positively correlated (P<0.05) with the annual mean temperature, the average daily minimum temperature in the coldest month, and the average daily mean temperature in the driest season. According to the clustering results of all provenances, T. sinensis could be divided into two provenance zones: south and north. Three excellent provenances were selected, namely Yuanmou, Enshi and Taihe. [Conclusion] There are significant differences among the provenances of 10-year-old T. sinensis, with a gradual decrease in the variation of tree height, DBH, and volume from south to north. DBH is the main genetic improvement trait during selection, which can provide a reliable basis for the selection of high-quality T. sinensis varieties for timber use.