文献类型：期刊文献

中文题名：山地木麻黄种源在海南临高的遗传变异及选择

英文题名：Genetic Variation and Selection of Casuarina junghuhniana Provenances at Lingao,Hainan

作者：韩强[1] 仲崇禄[1] 张勇[1] 姜清彬[1] 陈羽[1] 陈珍[1] Khongsak Pinyopusarerk[2]

第一作者：韩强

机构：[1]中国林业科学研究院热带林业研究所;[2]澳大利亚联邦科学与工业研究组织林木种子中心

年份：2017

卷号：30

期号：4

起止页码：595-603

中文期刊名：林业科学研究

外文期刊名：Forest Research

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2017_2018】；

基金：广东省林业科技创新项目(2014KJCX017);国家自然科学基金项目(31470634);"十二.五"科技支撑项目(2012BAD01B0603)

语种：中文

中文关键词：山地木麻黄;种源选择;遗传力;遗传变异

外文关键词：Casuarina junghuhniana ; provenance selection ; heritability; genetic variations

分类号：S792.93

摘要：[目的]研究山地木麻黄种源间抗风性、生长及形质性状的遗传变异规律,为山地木麻黄的良种选育和种质资源的合理开发利用提供科学依据。[方法]以27个山地木麻黄种源为试验材料,于造林后2、5、7 a时测定山地木麻黄种源的树高、胸径、单株材积和保存率等数量性状,并于造林后7 a时调查主干分叉习性(AP)、主干通直度(SFS)、侧枝密度(DPB)、侧枝直径(TPB)、绿色小枝长度(LDB)、侧枝分枝角(APB)、侧枝长度(LPB)等形质性状以及抗风性(RES),通过方差分析、相关性分析及遗传参数估算揭示其遗传变异规律。应用坐标综合评定法对山地木麻黄种源进行综合评定。[结果]表明:造林后2、5、7 a时,27个山地木麻黄种源间保存率和抗风性差异显著(P<0.05);对造林后7 a时保存率较高的18个种源进一步分析显示,上述3个年份各种源间树高、胸径和单株材积等生长性状均存在极显著差异(P<0.01);7 a时,TPB、APB、LDB、AP和SFS等形质性状在种源间亦存在显著或极显著差异;生长性状的种源遗传力明显高于形质性状,二者分别受中度或中度偏下和低度遗传控制;随着林龄的增长,树高的遗传变异系数变化不大,而胸径和单株材积的遗传变异系数呈先增加后降低的趋势,树高、胸径、单株材积的遗传变异系数分别为11.89%~12.30%、11.67%~13.67%、30.20%~38.11%;7 a时,形质性状的遗传变异系数为3.84×10^(-5)%~5.56%。性状间相关分析表明:树高作为山地木麻黄早期选择性状较适宜。[结论]依据坐标综合评定法,筛选出17877、19489和19490等3个优良种源,可在生产上大面积推广。
[Objective] In order to screen out superior provenances and individual trees for further cross-breeding, the inter-provenance genetic variations in terms of wind-resistance, growth and morphological traits were discussed in this context due to a trial of Casuarina junghuhniana including 27 provenances at Lingao, Hainan, China. [Method] The height, DBH, volume and survival were measured at the 2nd, 5th and 7th years after planting, and the qualitative traits including AP, SFS, DPB, TPB, LDB, APB, LPB and RES were investigated at the 7th year after planting. The genetic variations of these traits were studied by variance analysis, genotypic and phenotypic correlations, and genetic parameters. The provenances of C. junghuhniana were also assessed by comprehensive coordinate method. [Result] Significant differences （P〈0.05） were detected among 27 provenances in survival and RES at the 2nd, 5th and 7th years after planting. For a further analysis, the top 18 provenances in higher survivals at age of 7 indicated signi？ cant differences （P〈0.01） in tree height, DBH, volumes among provenances at the 2nd, 5th and 7th years after planting. It was also found that there were significant differences in TPB, APB, LDB, SFS （P〈0.01） and AP （P〈0.05） among provenances 7 years after planting. The heritability was moderate for growth traits and low for qualitative traits, suggesting the genetic controls were moderate on growth and weak on qualitative traits. Trends of coefficient of genetic variation for height were nearly stable, while the coefficients of genetic variations in DBH and volume tended to decreasing at initial and then increasing with age. The coefficients of genetic variation of height, DBH and volume were 11.89%-12.30%, 11.67%-13.67% and 30.20%-38.11%, respectively, and those for qualitative traits 7 years after planting ranged from 3.84×10^-5% to 5.56%. The high age-age and trait-trait phenotypic and genetic correlations for height and DBH indicated that early selection and multiple traits selection were feasible. Height was superior to other traits in the early selection for C. junghuhniana due to its genetic stability. [Conclusion] By analyzing nine traits at the 7th year after planting by comprehensive coordinate method, three optimal provenances were selected, which are worthy to be developed for producing and cross-breeding.