Genetic characterization of Libyan date palm resources by microsatellite markers

Racchi, Marco; Bove, Andrea; Turchi, Adelaide; Bashir, Gulnaz; Battaglia, Massimo; Camussi, A.

doi:10.1007/s13205-013-0116-6

Cited by 40 publications

(36 citation statements)

References 30 publications

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“…2.3.1 ). Apparently, there is little information available about the status of these species in the wild; their habitats are in many cases threatened by multiple anthropogenic and environmental factors (Chao and Krueger 2007 ;Munier 1981 ;Popenoe 1913 ). In addition, most of these species are lacking characterization and evaluation as potential genetic resources, and it is highly likely that the diversity of some species is threatened by genetic erosion (Krueger 1998(Krueger , 2011.…”

Section: The Genus Phoenixmentioning

confidence: 99%

“…Three wild Phoenix species grow on the fringes of traditional date palm cultivation in the Old World, and they may have enriched the gene pool of the cultivated species through spontaneous hybridization. These are P. atlantica which grows near the Atlantic shores of North Africa, and it is apparently involved in the formation of some Moroccan date palm cultivars; however, P. atlantica may represent only feral populations of P. dactylifera and may not be considered as a valid species (Popenoe 1913 ;Rivera et al 2008 ). Phoenix iberica is a wild species growing in wadis near the Mediterranean coast of Spain; it has glaucous leaves, stout stems, and small fruit with thin fl esh; its fruits are intermediate between P. theophrasti and P. sylvestris .…”

Section: The Genus Phoenixmentioning

confidence: 99%

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Biodiversity, Genetic Diversity, and Genetic Resources of Date Palm

Jaradat

2015

Date Palm Genetic Resources and Utilization

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Phoenix dactylifera L. is composed of genetically discrete clones representing thousands of cultivars without the benefi ts of a dynamic mutationrecombination system; its genetic resources are the most important component of biodiversity in its natural habitats; these include modern cultivars, landraces, obsolete cultivars, breeding lines, and related wild species. Cultivated Phoenix is closely related to a variable aggregate of wild and feral palms distributed over a wide desert belt across the Middle East and North Africa. Genetic diversity and genetic structure of the species gene pool complex have been shaped and greatly altered by human and natural selection, clonal propagation, and spatiotemporal exchange of germplasm. The mixed sexual-clonal propagation system acted on the sexual traits, impacted the genetic structure of populations, and may have resulted in the accumulation of domesticated traits in the date palm. Traditional oases continue to play a vital role in the maintenance and enrichment of date palm biodiversity, genetic diversity, and genetic resources through multiple processes and dynamic conservation practices. However, with the advent of modern plantations emphasizing elite cultivars, a better understanding of the intraspecifi c genetic variation of date palm and its distribution in oasis agroecosystems is essential for the conservation and sustainable utilization of its biodiversity and genetic resources. In-depth assessment of the genetic vulnerability of date palm to biotic and abiotic stress requires knowledge of the extent and distribution of its genetic diversity, both of which depend on the species evolution and its unique breeding system, past genetic bottlenecks, and ecological, environmental, and anthropogenic factors.

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Section: The Genus Phoenixmentioning

confidence: 99%

Section: The Genus Phoenixmentioning

confidence: 99%

Biodiversity, Genetic Diversity, and Genetic Resources of Date Palm

Jaradat

2015

Date Palm Genetic Resources and Utilization

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“…Fixation index, but not population differentiation, was significantly correlated with total diversity (r = 0.65; p = 0.05); also expected, but not observed heterozygosity, was correlated with total diversity (r = 0.73; p = 0.05). A recent study was carried out (Racchi et al, 2013) for the molecular typing of 377 female date palm trees belonging to 18 cultivars from Libya using 16 highly polymorphic SSR loci. The study reported scoring a total of 110 alleles with a mean of 6.88 alleles per locus.…”

Section: Microsatellites (Ssrs)mentioning

confidence: 99%

“…Observed heterozygosity can be predicted by the following equation: However, a closer inspection f the data revealed a non-linear relationship between Ho and He ( Figure 5) Racchi et al (2013) genetically characterized Libyan date palm cultivars using SSR markers (Table 7). In this study, both He was found to be slightly larger than and significantly correlated (r = 0.79; p = 0.01) with Ho; however, both were positively correlated with number of genotypes found in the study.…”

Section: Heterozygositymentioning

confidence: 99%

Synthesis and assessment of date palm genetic diversity studies

Jaradat

2014

Emir. J. Food Agric

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A thorough assessment of genetic diversity and population differentiation of Phoenix dactylifera are critical for its dynamic conservation and sustainable utilization of its genetic diversity. Estimates of genetic diversity based on phenotypic, biochemical and molecular markers; and fruit quality traits were utilized in assessing the population differentiation of date palm populations throughout its center of diversity. Some phenotypic traits may not exhibit variation in response to environmental or management factors and can be used as stable descriptors of date palm cultivars and for cultivar identification. The majority of analyzed studies based on isozyme and microsatellite markers, reported larger within-population than among-population genetic diversity levels. Most variation estimated for fruit quality traits was found among populations; however, substantial differences in genetic diversity components were found among and within populations. The overall partitioning of genetic diversity, based on phenotypic, biochemical, molecular, and fruit quality traits suggested that date palm cultivars represent a complex gene pool within which historical movement of germplasm, recent introductions and human selection are shaping their genetic structure. The empirical evidence derived from this assessment suggested that the genetic structure of date palm populations is controlled by the environment, isolation by distance, and the biological characteristics of the tree.

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“…It is cultivated in the Middle East and North Africa (Hamza et al, 2011), where it is considered a valuable fruit crop (Racchi et al, 2014). The annual global production of dates is estimated to be about 7.4 million tons, while Saudi Arabia accounts for more than one million tons (FAOSTAT, 2013).…”

Section: Introductionmentioning

confidence: 99%

Analysis of similarities within different date palm cultivars of Al-Ahsa oasis in Saudi Arabia

Al-Issa¹

2017

Afr. J. Biotechnol.

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Date palm (Phoenix dactylifera L.) is widely cultivated in Saudi Arabia, with annual production estimated to be above one million tons. Of the 450 cultivars that are commonly used, 70 cultivars are found in the Eastern province and 20 cultivars are well known and common in the Al-Ahsa oasis. In this study, thirty seven date palm samples representing nine cultivars collected from six locations in the AlAhsa oasis, Saudi Arabia. Total proteins were extracted and subjected to analysis by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). The results revealed several differences within the cultivars. Overall polymorphism ranged between 12 and 76%, with the highest being 76% within Helali cultivar, and the least being 12% within OmRohaim cultivar. These results support the conclusion that some palms are grown from seeds resembling a known cultivar, which are later distributed as the known cultivar. These results revealed differences in the degree of similarity between the cultivars from 0.059 to 0.579, estimated according to Jaccard`s similarity method based on the presence and absence of protein bands. Khosab and Shehel cultivars were closely related to each other with 0.579 degrees of similarity, both separated by phylogenetic dendrogram in mini-cluster, which have been confirmed by the 1st principal components. The mini-cluster was related to OmRohaim and Khonaizi cultivars within a larger cluster. Shishi, Garrah and Helali were related cultivars, with degrees of similarities ranging between 0.250 and 0.455, and were separated in one cluster by phylogenetic dendrogram. The close relationship between the cultivars may indicate that they originated from the same ancestor. Further molecular and biochemical studies are needed to enrich our knowledge about the relationships among date palm cultivars.

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Genetic characterization of Libyan date palm resources by microsatellite markers

Cited by 40 publications

References 30 publications

Biodiversity, Genetic Diversity, and Genetic Resources of Date Palm

Biodiversity, Genetic Diversity, and Genetic Resources of Date Palm

Synthesis and assessment of date palm genetic diversity studies

Analysis of similarities within different date palm cultivars of Al-Ahsa oasis in Saudi Arabia

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