A meta-analysis of genetic divergence versus phenotypic plasticity in walnut cultivars (Juglans regia L.)

IF 2.1 4区生物学 Q2 Agricultural and Biological Sciences

Caryologia Pub Date : 2022-03-08 DOI:10.36253/caryologia-1129

Melika Tabasi, M. Sheidai, F. Koohdar, Darab Hassani

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Abstract

Persian walnut (Juglans regia L.), is very auspicious plant species of Iran from both economical and food points of views. Both wildly grown as well as cultivated forms of this plant species are scattered in different geographical regions of the country and are a valuable source for edible nut as well as job employment. Scattered published data on genetic diversity of this important plant species are mainly based on different molecular data analyses; therefore a meta-analysis of the same cultivars based on several different molecular markers including DNA-sequences and multi-locus markers was conducted to provide a detailed insight on genetic structure of walnuts. The results indicated a moderated genetic variability of about 40 percent in the studied cultivars; however these cultivars are genetically differentiated as revealed by Fst and AMOVA. HGT analyses revealed that the cultivars phylogeny differs to some degree by different markers and therefore a heat map was constructed to reveal the cultivars relationships based on combined molecular data. A higher Pst value was obtained compared to that of Fst genetic differentiation, therefore, it seems that local adaptation and selection have played role in the walnut cultivars’ morphological divergence. LFMM analysis identified some adaptive multi-locus alleles in the studied walnut cultivars.

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核桃品种遗传分化与表型可塑性的meta分析

波斯核桃(Juglans regia L.)，是伊朗非常吉祥的植物物种，从经济和食物的角度来看。这种植物的野生和栽培形式分散在该国的不同地理区域，是可食用坚果和就业的宝贵来源。关于这一重要植物物种遗传多样性的零散研究数据主要基于不同的分子数据分析;基于不同分子标记(包括dna序列和多位点标记)，对同一品种核桃进行meta分析，以详细了解核桃的遗传结构。结果表明，所研究品种的遗传变异性约为40%;Fst和AMOVA分析表明，这些品种具有遗传分化。HGT分析表明，不同标记对品种系统发育的影响存在一定程度的差异，因此构建了基于组合分子数据的热图来揭示品种关系。与Fst相比，Pst值更高，因此，核桃品种的形态分化可能与局部适应和选择有关。LFMM分析在核桃品种中发现了一些自适应多位点等位基因。

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来源期刊

Caryologia 生物-遗传学

CiteScore

1.60

自引率

23.80%

发文量

审稿时长

12 months

期刊介绍： Caryologia is devoted to the publication of original papers, and occasionally of reviews, about plant, animal and human karyological, cytological, cytogenetic, embryological and ultrastructural studies. Articles about the structure, the organization and the biological events relating to DNA and chromatin organization in eukaryotic cells are considered. Caryologia has a strong tradition in plant and animal cytosystematics and in cytotoxicology. Bioinformatics articles may be considered, but only if they have an emphasis on the relationship between the nucleus and cytoplasm and/or the structural organization of the eukaryotic cell.