Phenotypic variation and genetic diversity in European Alnus species

IF 3 2区 农林科学 Q1 FORESTRY
Forestry Pub Date : 2024-07-18 DOI:10.1093/forestry/cpae039
Inês Gomes Marques, Cristina Vieites-Blanco, Maria J Barrento, José N Semedo, Ana P Rodrigues, Paula Scotti-Campos, M Angela Martín, Alejandro Solla, Teresa S David, Patricia M Rodríguez-González
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Abstract

The recent taxonomic distinction between the European common alder species Alnus glutinosa and A. lusitanica strengthens the need for studies on phenotypic and genetic variation. Understanding such variations requires the use of populations encompassing the total latitudinal distribution and environmental envelope of the distribution range of A. glutinosa and A. lusitanica. This study aims to describe the genetic diversity and assess the phenology, morphology, physiology and biochemistry of alder seedlings from populations reaching out to the latitudinal extremes of both species. We grew 1579 2-year-old seedlings from seven A. glutinosa and six A. lusitanica populations in a common garden in Oeiras, Portugal. By using simple sequence repeat markers, two genetically distinct groups in A. glutinosa and three in A. lusitanica were identified. The species presented marked morphological and biochemical differences. The southern populations of A. lusitanica showed higher genetic diversity than A. glutinosa populations. Significant associations between four alleles from three loci, and one morphological and three biochemical traits were detected in several genetic groups from both alder species. Traits from southern populations of A. lusitanica were associated with low water availability. Inter-specific trait variation and association of traits with molecular markers suggest that A. lusitanica might have an adaptive advantage if subjected to drought and heat stressors. This study strengthens the recent taxonomical differentiation between the two species and emphasizes the need for preserving southern A. lusitanica populations and their genetic diversity in Mediterranean riparian corridors.
欧洲欧鼠李物种的表型变异和遗传多样性
最近,欧洲常见桤木物种桤木(Alnus glutinosa)和桤木(A. lusitanica)在分类学上被区分开来,这加强了对表型和遗传变异进行研究的必要性。要了解这些变异,就需要利用涵盖桤木(A. glutinosa)和桤木(A. lusitanica)分布区总纬度分布和环境包络的种群。本研究旨在描述桤木幼苗的遗传多样性,并对其物候学、形态学、生理学和生物化学进行评估。我们在葡萄牙奥伊拉斯(Oeiras)的一个普通花园中培育了 1579 株 2 岁桤木幼苗,分别来自 7 个桤木种群和 6 个桤木种群。通过使用简单序列重复标记,我们在 A. glutinosa 和 A. lusitanica 中分别鉴定出了两个不同的基因组。这些物种在形态和生化方面存在明显差异。南部的 A. lusitanica 种群比 A. glutinosa 种群表现出更高的遗传多样性。在两个桤木物种的几个遗传组中,发现三个位点的四个等位基因与一个形态特征和三个生化特征之间存在显著关联。A. lusitanica南部种群的性状与低水分可用性有关。种间性状变异以及性状与分子标记的关联表明,如果受到干旱和高温胁迫,A. lusitanica 可能具有适应优势。这项研究加强了这两个物种最近在分类学上的区分,并强调了在地中海河岸走廊保护南部 A. lusitanica 种群及其遗传多样性的必要性。
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来源期刊
Forestry
Forestry 农林科学-林学
CiteScore
6.70
自引率
7.10%
发文量
47
审稿时长
12-24 weeks
期刊介绍: The journal is inclusive of all subjects, geographical zones and study locations, including trees in urban environments, plantations and natural forests. We welcome papers that consider economic, environmental and social factors and, in particular, studies that take an integrated approach to sustainable management. In considering suitability for publication, attention is given to the originality of contributions and their likely impact on policy and practice, as well as their contribution to the development of knowledge. Special Issues - each year one edition of Forestry will be a Special Issue and will focus on one subject in detail; this will usually be by publication of the proceedings of an international meeting.
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