Genetic Diversity and Population Structure of Wild Olives from the North-western Mediterranean Assessed by SSR Markers

Belaj, Angjelina; Muñoz-Díez, Concepción; Baldoni, Luciana; Porceddu, Andrea; Barranco, D.; Šatović, Zlatko

doi:10.1093/aob/mcm132

Cited by 134 publications

(120 citation statements)

References 43 publications

(57 reference statements)

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“…Interestingly, our data are consistent with previous studies in faba bean which revealed a larger genetic variation and differentiation within than between population (Terzopoulos and Bebeli 2008; Ouji et al 2011;Oliveira et al 2016). Moreover, this was consistent with the findings from other species such as grapevine (De Andrés et al 2012), olive (Belaj et al 2007), apple ) and lettuce (Rauscher and Simko 2013).…”

Section: Discussionsupporting

confidence: 92%

Genetic variability in Tunisian populations of faba bean (Vicia faba L. var. major) assessed by morphological and SSR markers

Rebaa¹,

Abid²,

Aouida³

et al. 2017

Physiol Mol Biol Plants

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The genetic diversity of 21 faba bean populations was examined using morphological and molecular markers. DNA was extracted from 189 individuals and 8 microsatellite markers were genotyped individually in these 21 populations. A total of 53 alleles were obtained in all populations, with an average of 6.62 alleles per locus. The expected and observed heterozygosity was 0.38 and 0.62 respectively. The average polymorphism index content of SSR markers was 0.61, ranging from 0.31 to 0.81. The unweighted pair group method with arithmetic mean dendrogram clustered all the populations into two groups, each for them subdivided into 3 sub-groups according to geographical origin. Morphological variation showed that the populations were not grouped according to their geographical origin. Therefore, patterns of differentiation of morphological traits did not coincide with molecular differentiation, indicating that morphological variation does not reflect genetic subdivision in studied faba bean populations. Analysis of molecular variance revealed high levels of genetic variation (83%) within population and provides a good base for designing genetic improvement programs. The result of Principal Component Analysis (PCA) revealed that three dimensional principal components (PC1, PC2 and PC3) contributed 40.56% of the total variability and accounted with values of 20.64, 11.22 and 8.70%, respectively. Cluster analysis based on PCA indicated three separate groups of populations. The genetic relationships found between the 21 populations samples were the same in both the PCA and STRUCTURE analysis which support the results observed. These data may serve as a foundation for the development of faba bean breeding programs.

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Section: Discussionsupporting

confidence: 92%

Genetic variability in Tunisian populations of faba bean (Vicia faba L. var. major) assessed by morphological and SSR markers

Rebaa¹,

Abid²,

Aouida³

et al. 2017

Physiol Mol Biol Plants

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“…High values of all diversity indicators are considered to show allelic richness in the analysed germplasm, which can be used in breeding programmes targeted at specific plant types for commercial cultivation [39]. Because of the large number and diversity of investigated individuals, the number of alleles identified in the present study is relatively larger than that in other studies [24,28], which is in line the observations made by Belaj et al [40]. Overall, the 36 SSR markers were fairly successful for construction of a specific fingerprint of the 134 ramie accessions.…”

Section: Ssr Analysis Of 134 Accessionssupporting

confidence: 90%

Genetic structure and relationships of an associated population in ramie (Boehmeria niveaL. Gaud) evaluated by SSR markers

Zhu

Liu

Dai

et al. 2016

Biotechnology & Biotechnological Equipment

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Ramie (Boehmeria nivea L. Gaud) is one of the most important natural fibre crops. For enhanced crop development, it is necessary to understand its population structure and genetic relationships. In this study, we assessed the genetic diversity and population structure of 134 ramie accessions (with three plants per accession) from 12 regions by using 36 simple sequence repeat markers. The 36 microsatellite primers revealed 149 alleles in 134 ramie populations, with an average of 4.14 alleles per locus. The structure analysis divided the 134 ramie accessions into three groups (I, II and III), and into further six subgroups (a, b, c, d, e and f). In Subgroup b, 13 accessions were from Guizhou Province, 9 accessions were from Sichuan Province and the remaining 20 accessions were from Chongqing (4), Hunan (8), Guangxi (4), Jiangxi (2), Yunan (1) and Taiwan (1). In Subgroup d, 22 accessions were from Guizhou Province and the remaining 17 accessions were from Chongqing (6), Sichuan (5) and Yunnan (6). It can be inferred that the genetic background of these ramie accessions did not always correlate with their geographical regions. Similar results were found in Subgroups a and f. The pair-wise genetic similarity coefficients between the 134 accessions ranged from 0.390 to 0.939, which suggested that there was abundant genetic diversity in the ramie accessions. These markers have provided important information about the genetic structure of ramie, which can contribute to future breeding and improvement programmes for these resources.

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“…Studying partition of the genetic diversity between and within populations can help unravel the dynamic of gene flow (for example, Baldoni et al, 2006;Rubio de Casas et al, 2006;Belaj et al, 2007) and assess the importance of some geographic and biological features, such as habitat fragmentation, altitudinal distribution, clonal growth and lifespan of individuals. For instance, one can expect that desert barriers may have greatly limited gene flows between distant mountains and that small populations are more affected by stochastic effects (for example, genetic drift).…”

Section: Introductionmentioning

confidence: 99%

Spatial genetic structure in the Laperrine's olive (Olea europaea subsp. laperrinei), a long-living tree from the central Saharan mountains

et al. 2007

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The Laperrine's olive (Olea europaea subsp. laperrinei) is an emblematic species of the Sahelo-Saharan Mountains. Populations of this tree are locally threatened by extinction due to climatic vicissitudes and human activities, particularly in Niger and Algeria. In order to study the spatial genetic structure and the dynamics of O. e. laperrinei populations, we sampled trees in four isolated mountain ranges (Tassili n'Ajjer and Hoggar (Algeria), Tamgak and Bagzane (Niger)). A total of 237 genets were identified using nuclear microsatellites. Phylogenetic reconstruction based on plastid DNA data supported a maternal origin of O. e. laperrinei populations in South Algeria, where a higher allelic richness was observed. Based on nuclear microsatellite data, two levels of structure were revealed: first, individuals from Niger and Algeria were separated in two distinct groups; second, four less differentiated clusters corresponded to the four studied mountain ranges. These results give support to the fact that desert barriers have greatly limited long distance gene flow. Within populations, pairwise kinship coefficients were significantly correlated to geographical distance for Niger populations but not for Algerian mountains. Historical factors and habitat heterogeneity may explain the differences observed. We conclude that the Hoggar acts as an important genetic reservoir that has to be taken into account in future conservation programmes. Moreover, very isolated endangered populations (for example, Bagzane) displaying evident genetic particularities have to be urgently considered for their endemism.

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Genetic Diversity and Population Structure of Wild Olives from the North-western Mediterranean Assessed by SSR Markers

Cited by 134 publications

References 43 publications

Genetic variability in Tunisian populations of faba bean (Vicia faba L. var. major) assessed by morphological and SSR markers

Genetic variability in Tunisian populations of faba bean (Vicia faba L. var. major) assessed by morphological and SSR markers

Genetic structure and relationships of an associated population in ramie (Boehmeria niveaL. Gaud) evaluated by SSR markers

Spatial genetic structure in the Laperrine's olive (Olea europaea subsp. laperrinei), a long-living tree from the central Saharan mountains

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