Study of the Genetic Structure and Gene Flow in Persian Walnut (Juglans Regia L.) Using SSR Markers

Mohsenipoor, Somayeh; Vahdati, Kourosh; Amiri, R Maali; Mozaffari, M R

doi:10.17660/actahortic.2010.861.17

Cited by 19 publications

(16 citation statements)

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“…regia accessions was higher than observed heterozygosity (H o ), showing a deficiency of heterozygotes that suggests the presence of pedigree inbreeding. Average H o (0.47) and average H e (0.56) are similar to those found in other studies on walnut natural populations or germplasm collections, with a lower H o [ 34 – 44 ] and indicates a potential structure within the INRA walnut germplasm collection.…”

Section: Discussionsupporting

confidence: 85%

Analysis of genetic diversity and structure in a worldwide walnut (Juglans regia L.) germplasm using SSR markers

Bernard¹,

Barreneche²,

Lheureux³

et al. 2018

PLoS ONE

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Persian or English walnut (Juglans regia L.), the walnut species cultivated for nut production, is one of the oldest food sources known and is grown worldwide in temperate areas. France is the 7th leading producer as of 2016 with 39 kt. Deciphering walnut genetic diversity and structure is important for efficient management and use of genetic resources. In this work, 253 worldwide accessions from the INRA walnut germplasm collection, containing English walnut and several related species, were genotyped using 13 SSR (Single Sequence Repeat) markers selected from the literature to assess diversity and structure. Genetic diversity parameters showed a deficiency of heterozygotes and, for several SSRs, allele-specificities among the accessions tested. Principal Coordinate Analysis (PCoA) showed the 253 accessions clustered in largely in agreement with the existing botanical classification of the genus. Among the 217 J. regia accessions, two main clusters, accessions from Eastern Europe and Asia, and accessions from Western Europe and America, were identified using STRUCTURE software. This was confirmed by Principal Coordinate Analysis and supported by Neighbor-Joining tree construction using DARwin software. Moreover, a substructure was found within the two clusters, mainly according to geographical origin. A core collection containing 50 accessions was selected using the maximum length sub-tree method and prior knowledge about their phenotype. The present study constitutes a preliminary population genetics overview of INRA walnut genetic resources collection using SSR markers. The resulting estimations of genetic diversity and structure are useful for germplasm management and for future walnut breeding programs.

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Section: Discussionsupporting

confidence: 85%

Analysis of genetic diversity and structure in a worldwide walnut (Juglans regia L.) germplasm using SSR markers

Bernard¹,

Barreneche²,

Lheureux³

et al. 2018

PLoS ONE

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“…The same result was found by Vischi et al (2017), which did not reveal any significant correlation between geographic and genetic distances among walnut populations from the Eastern Italian Alps. More, Mohsenipoor and Vahdati, (2010) reported that the geographical proximity of the populations was not correlated to their level of genetic relatedness. Nevertheless, Wang and Pei (2008) reported that the Mantel test has shown a significant correlation between pairwise genetic distance and geographic distance among nine walnut populations (r=0.35, P˂0.005).…”

Section: Discussionmentioning

confidence: 99%

Genetic diversity and structure of walnut (Juglans regia L.) genotypes from Middle and High Atlas mountains of Morocco as investigated by Inter-Simple Sequence Repeat (ISSR) markers

Kabiri¹,

Bouda²,

Elhansali³

et al. 2019

Aust J Crop Sci

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The genetic diversity and genotypes structure of walnut (Juglans regia L.) are essential to understand and manage genetic resources of this species, as well as for further progress in breeding programs. ISSR markers were used to assess the genetic diversity of 66 individuals’ trees from 11 accessions, representing the main cropping area of walnut belonging to two ranges types of Mountain in Morocco: middle and high Atlas. Eleven ISSR primers rendered a total of 135 bands (91%) with 0.88 polymorphic information content. The utilization of 123 polymorphic bands revealed a high level of genetic variation within and among the examined accessions. The multi-locus values of Ht and Hs were 0.25 and 0.20, respectively. The AMOVA analysis showed that 71.30% of total genetic variability is accounted within accessions and 28.70% between accessions. This was congruent with the coefficient of genetic differentiation (GST=0.16). Bayesian model-based clustering approach identified three gene pools that were not correlated with mountain range type. This is the first application of ISSR markers for the assessment of genetic diversity in Moroccan germplasm of walnut. This information will be useful to define conservation strategies and improvement programs of this species.

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“…The following sections depict an overview of these molecular studies and their application (Table 2). Woeste et al 2002;Dangl et al 2005;Hoban et al 2008;Zhang et al 2010;Qi et al 2011;Yi et al 2011;Wu et al 2012;Zhang et al 2013;Chen et al 2013;Najafi et al 2014;Topçu et al 2015;Ikhsan et al 2016;Dang et al 2015;Hu et al 2015;Dang et al 2016 Interspecific hybrids identification Pollegioni et al 2008Pollegioni et al , 2009 Genetic diversity/relationships determination Foroni et al 2005;Dangl et al 2005;Victory et al 2006;Robichaud et al 2006;Wang et al 2008;Aradhya et al 2009;Gunn et al 2010;Karimi et al 2010;Bai et al 2010;Mohsenipoor et al 2010;Ebrahimi et al 2011;Ruiz-Garcia et al 2011;Pollegioni et al 2011;Qi et al 2011;Grauke et al 2012;Mahmoodi et al 2013;Zhang et al 2013;Pop et al 2013;Najafi et al 2014;Dang et al 2015;Hu et al 2015;Han et al 2016;Noor Shah et al 2016;Ćelepirović et al 2016;Wang et al 2016;…”

Section: Historical Overview Of Molecular Marker Development and Usementioning

confidence: 99%

“…An analysis of the genetic structure in J. regia using SSRs revealed a high level of genetic diversity with five genetic groups linked to the centers of diversity of walnut in Eurasia (Aradhya et al 2009). Later, SSR markers were also used in Iran to study the genetic diversity of genotypes (Karimi et al 2010;Mohsenipoor et al 2010;Ebrahimi et al 2011;Mahmoodi et al 2013;Najafi et al 2014). Cultivars, mainly from Spain and the USA, were studied with SSR markers and data separated Spanish cultivars from those of California (RuizGarcia et al 2011).…”

Section: Peak Of Molecular Studies With Ssrs From the Late 2000smentioning

confidence: 99%

Walnut: past and future of genetic improvement

Bernard

Lheureux²,

Dirlewanger

2017

Tree Genetics & Genomes

163

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Persian or English walnut (Juglans regia L.), the walnut species cultivated for nut production, is one of the oldest food sources known. Persian walnuts, native to the mountain valleys of Central Asia, are grown worldwide in temperate areas. World production exceeds three million tons since 2012, mostly provided by China, the USA, and Iran. Despite very ancient culture of walnut species (Juglans spp.), breeding actually started in the twentieth century. Using a range of methodologies, from morphological markers to the most recent advances in genome analysis, many genetic studies of walnut have been conducted during the past 30 years, including examination of diversity, determination of relationships within or among germplasm collections and populations, phylogenetic and origin elucidation, genetic map construction, and biotic or abiotic stress investigations. The genetic improvement of walnut has undergone great evolution. The producing countries of the Middle East have widely studied morphological characteristics of walnut. The USA and France, for example, are behind important cultivar releases such as BChandler^and BFranquette.^Finally, genomics represents a major breakthrough in walnut improvement, in particular by recent sequencing of both chloroplast and nuclear genomes. This review summarizes worldwide molecular and Bomics^studies and gives an overview of the main walnut breeding programs.

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Study of the Genetic Structure and Gene Flow in Persian Walnut (Juglans Regia L.) Using SSR Markers

Cited by 19 publications

References 0 publications

Analysis of genetic diversity and structure in a worldwide walnut (Juglans regia L.) germplasm using SSR markers

Analysis of genetic diversity and structure in a worldwide walnut (Juglans regia L.) germplasm using SSR markers

Genetic diversity and structure of walnut (Juglans regia L.) genotypes from Middle and High Atlas mountains of Morocco as investigated by Inter-Simple Sequence Repeat (ISSR) markers

Walnut: past and future of genetic improvement

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