文献类型：期刊文献

中文题名：25份奇楠沉香无性系的生长变异与综合评价

英文题名：Growth Variation and Comprehensive Evaluation of 25 Aquilaria sinensis Qi Nan Clones

作者：钟源源[1,3] 付豪[1,3] 杨保国[1,3] 崔之益[2] 陈乐康[1,3] 毛纯[4] 熊俊飞[1,3] 赵宏鹏[1,3] 覃瑶[1,3] 郝建[1,3]

第一作者：钟源源

机构：[1]中国林业科学研究院热带林业实验中心,广西凭祥532600;[2]中国林业科学研究院热带林业研究所,广东广州510520;[3]广西友谊关森林生态系统国家定位观测研究站/崇左凭祥友谊关森林生态系统广西野外科学观测研究站,广西凭祥532600;[4]广西国有七坡林场,广西南宁530004

年份：2025

卷号：46

期号：10

起止页码：2390-2400

中文期刊名：热带作物学报

外文期刊名：Chinese Journal of Tropical Crops

收录：;北大核心:【北大核心2023】；

基金：广西林业科技推广示范项目(桂林科研[2022]第2号,No.2024GXLK32);广西自然科学基金项目(No.2024GXNSFBA010421)。

语种：中文

中文关键词：奇楠沉香;无性系;生长;遗传变异;聚类分析

外文关键词：Aquilaria sinensis Qi Nan;clone;growth;genetic variation;cluster analysis

分类号：S792.99

摘要：探究奇楠沉香无性系的生长规律和遗传变异特征,为奇楠沉香优良无性系早期高效选育提供理论依据,助力沉香产业提质增效。以中国林业科学研究院热带林业实验中心栽培的25份奇楠沉香无性系为研究对象,通过连续调查3 a生长性状等指标,分析不同无性系的生长表现、适应性以及生长性状变异等早期生长差异和相关性,综合遗传参数估算和聚类分析,筛选具有速生、广适性特征的优良无性系。结果表明:25份奇楠沉香无性系的树高、地径和保存率均差异显著,3 a的平均树高、地径和保存率分别为134.15 cm、2.89 cm、68.40%,最大的均为Qi NYH,最小的均为Bo LZ。25份奇楠沉香无性系造林后树高和地径年生长量存在较大的变幅,整体表现为种植第3年的树高和地径显著提高。25份奇楠沉香无性系在不同生长时期树高和地径均表现出不同幅度的变异,地径性状离散大,变异最为丰富。生长性状3 a的广义遗传力均较高且稳定,均在0.63以上。地径、树高和保存率之间呈显著或极显著正相关。通过主成分分析对25份奇楠沉香无性系进行综合排名,按照20%的入选率,入选前5名的依次是Qi NYH、Ao S、Jin SZ、Tu YW、Cuan T。通过聚类分析将25份参试无性系分为4类,第Ⅰ类长势较好,包括Ao S、Qi NYH、Lan BS、Tu YW、Jin SY、Xi GY、Jin SZ和Cuan T,树高、地径和保存率分别在158.00 cm、3.00 cm和73.00%以上,具有较强的后期生长潜力;第Ⅱ类和第Ⅲ类长势居中;第Ⅳ类长势较差,树高、地径和保存率均较低。通过综合评价得出,无性系Qi NYH、Ao S、Jin SZ、Tu YW和Cuan T的树高、地径、年生长量和保存率等均表现较好,适宜作为综合品质优良的奇楠沉香无性系在凭祥等地进行推广种植。
The study explored the growth regularity and genetic variation characteristics of Aquilaria sinensis Qi Nan clones to provide a theoretical basis for selection superior A.sinensis Qi Nan clones and application.25 A.sinensis Qi Nan clones cultivated in the Experimental Center of Tropical Forestry of the Chinese Academy of Forestry were investigated,the tree height and basal diameter were measured at 1,2 and 3 years,respectively.The study analyzed early growth performance,adaptability,growth trait variations among different clones,and the intercorrelations.Comprehensive estimation of genetic parameters and cluster analysis were used to select superior clones.There were significant differences in tree height,basal diameter and preservation rate among the clones.The average tree height,basal diameter and preservation rate at 3 years old was 134.15 cm,2.89 cm and 68.40%,respectively.The highest was Qi NYH,and the lowest was Bo LZ.There were substantial variations in the annual growth increments of tree height and basal diameter among the clones.Generally,the tree height and basal diameter increased remarkably in the third year.The clones showed different ranges of variation in tree height and basal diameter at different growth stages.The basal diameter showed a high degree of dispersion and the richest variation.The broad-sense heritability of growth traits in 3 years was high and stable,above 0.63.Basal diameter,tree height and preservation rate showed significant or extremely significant positive correlation.Principal component analysis revealed that the clones were comprehensively evaluated and ranked based on the scores.According to the selection rate of 20%,the top five were Qi NYH,Ao S,Jin SZ,Tu YW and Cuan T in turn.The results of cluster analysis showed that the clones were divided into 4 categories.Class Ⅰ grew better,and had stronger potential for growth in the later period than others,including Ao S,Qi NYH,Lan BS,Tu YW,Jin SY,Xi GY,Jin SZ and Cuan T,with the tree height,basal diameter and preservation rate above 158.00 cm,3.00 cm and 73.00%,respectively.Class Ⅱ and Class Ⅲ grew relatively fast.Class Ⅳ grew the slowest with the slowest tree height,basal diameter and preservation rate.Through comprehensive evaluation,Qi NYH,Ao S,Jin SZ,Tu YW and Cuan T clones had the best performance in tree height,basal diameter and preservation rate.They could be popularized and planted as the excellent comprehensive quality of A.sinensis Qi Nan clones in Pingxiang and other suitable places.