[1]姚建忠. 中国北方青杨派杨树遗传多样性研究[J].西北林学院学报,2024,39(2):79-84.[doi:10.3969/j.issn.1001-7461.2024.02.10]
　YAO Jian-zhong. Genetic Diversity of Tacamahaca in Northern China[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2024,39(2):79-84.[doi:10.3969/j.issn.1001-7461.2024.02.10]
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 中国北方青杨派杨树遗传多样性研究()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第39卷
期数:
2024年第2期
页码:
79-84
栏目:
出版日期:
2024-03-31

文章信息/Info

Title:
 Genetic Diversity of Tacamahaca in Northern China
文章编号:
1001-7461(2024)02-0079-06
作者:
 姚建忠
 （山西省桑干河杨树丰产林实验局，山西 大同 037006）
Author(s):
 YAO Jian-zhong
 (Sangganhe High Yield Poplar Forest Experiment Bureau of Shanxi Province,Datong 037006,Shanxi,China)
关键词:
 ; 青杨派; 青杨; 遗传多样性; 遗传结构
Keywords:
Tacamahaca;  P.cathayana;  gnetic diversity;  genetic structure
分类号:
S792.113
DOI:
10.3969/j.issn.1001-7461.2024.02.10
文献标志码:
A
摘要:
 青杨派杨树是我国广泛分布的一类生态、经济型树种。目前尚未对青杨派杨树资源开展有效评价、利用及保护工作。以中国北方地区青杨派杨树19个种群的112个样本为材料，利用15对微卫星标记进行遗传多样性和遗传结构分析。结果表明，青杨派杨树19个种群总等位基因数（Na）为118，有效等位基因数（Ne）为3.439，观测杂合度（Ho）为0.392，期望杂合度（He）为0.347，信息指数（I）为0.582，表明青杨派杨树具有较高的遗传多样性水平；遗传分化系数（Fst）为0.39，表明青杨派不同杨树种群间存在显著的遗传分化。通过遗传结构分析和聚类分析，将青杨派杨树19个种群分为2个大类群，大青杨与香杨、二白杨与小叶杨种群间具有相近的亲缘关系；其中的9个青杨种群可分为3个大类群，且遗传距离与地理距离、气候因子距离呈显著相关性（r=0.758，P=0.010；r=0.330，P=0.04），表明青杨种群遗传分化受到地理隔离以及气候条件差异影响。研究结果为杨树遗传改良、种质资源保存和利用提供理论依据，同时对青杨派系统发育和进化机制也提供重要参考价值。
Abstract:
Tacamahaca is a type of ecological and timber tree species widely distributed in China.At present,little studies have been carried out on the effective resource assessment,utilization,and protection.Taking 112 samples obtained from 19 Tacamahaca populations in Northern China as research materials,this study assessed the genetic diversity and genetic structure by using 15 microsatellite markers.The results showed that total number of alleles (Na) was 118,average number of effective allele (Ne) was 3.439,observed heterozygosity (Ho) and expected heterozygosity (He) was 0.392 and 0.347,respectively,and information index(I) was 0.582,indicating that a high level of genetic diversity among 19 Tacamahaca populations.The genetic differentiation coefficient (Fst) was 0.39,suggesting that there is significant differentiation among 19 Tacamahaca populations.Niteen Tacamahaca populations were divided into the two clusters by structure and cluster analysis.There was a similar genetic relationships between P.ussuriensis population and P.koreana population,as well as P.gansuensis population and P.simonii population.Nine populations of P.cathayana can be divided into the three clusters,the genetic distance was significantly correlated with geographical distance and climatic distance,respectively (r=0.758,P=0.010；r=0.330,P=0.04),indicating that the genetic differentiation of P.cathayana populations is influenced by geographical isolation and climatic differences.This study provides a theoretical basis for the genetic improvement,germplasm conservation and utilization of Tacamahaca resources,and provides an important reference for the study of phylogenetic and evolutionary mechanism of Tacamahaca.

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备注/Memo

备注/Memo:
 收稿日期：2023-02-23修回日期：2023-05-05
基金项目：中央财政林业改革发展资金计划(2022KJZX001)；山西省林草重点研发计划（2023FSZSSF01）。
第一作者：姚建忠，高级工程师。研究方向：杨树良种选育。E-mail:2693863026@qq.com
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