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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Substantial genetic diversity in cultivated Moroccan olive despite a single major cultivar: A paradoxical situation evidenced by the use of SSR loci
Tree Genetics and Genomes, Volume 4, No. 2, Year 2008
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Description
To assess the genetic diversity in Moroccan cultivated olive, Olea europaea L. subsp. europaea, we performed molecular analysis of olive trees sampled in four geographic zones representing all areas of traditional olive culture. The analysis of 215 trees using 15 simple sequence repeat (SSR) loci revealed 105 alleles distributed among 60 SSR profiles. The analysis of chloroplast deoxyribonucleic acid polymorphism for these 60 olive genotypes allowed to identify four chlorotypes: 42 CE1, one CE2, nine COM1 and eight CCK. Among the 60 SSR profiles, 52 corresponded to cultivated olive trees for which neither denomination nor characterisation is available. These local olive genotypes displayed a spatial genetic structuring over the four Moroccan geographic zones (northwest, north centre, Atlas and southwest), as pairwise Fst values ranged from 0.0394 to 0.1383 and varied according to geographic distance. As single alleles detected in local olive were also observed in Moroccan oleaster populations, results suggest that plant material was mainly selected from indigenous populations. The assumption that Picholine marocaine cultivar is a multi-clonal cultivar was not supported by our data because we found a single genotype for 112 olive trees representing 31 to 93% of the olives sampled locally in the 14 different areas. Picholine marocaine and the few other named cultivars do not seem to belong to the same gene pools as the unnamed genotypes cultivated only locally. The situation is paradoxical: a substantial genetic diversity in Moroccan olive germplasm, probably resulting from much local domestication, but a single cultivar is predominant. © 2007 Springer-Verlag.
Authors & Co-Authors
Khadari, Bouchaïb
France, Hyeres
Parc National de Port-cros
France, Montpellier
Inrae's Occitanie-montpellier Centre
Charafi, Jamal
Morocco, Marakech
Faculté Des Sciences et Techniques Marrakech
Moukhli, Abdelmajid
Morocco, Rabat
Institut National de la Recherche Agronomique, Morocco
Ater, Mohammed
Morocco, Tetouan
Faculté Des Sciences de Tétouan
Statistics
Citations: 90
Authors: 4
Affiliations: 5
Identifiers
Doi:
10.1007/s11295-007-0102-4
ISSN:
16142942
Research Areas
Genetics And Genomics