Isozyme polymorphism and genetic differentiation in natural populations of an endemic tetraploid species Avena maroccana in Morocco

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dc.contributor.author Morikawa, Toshinobu
dc.contributor.author Leggett, J. Michael
dc.date.accessioned 2009-05-21T11:21:02Z
dc.date.available 2009-05-21T11:21:02Z
dc.date.issued 2008-12
dc.identifier.citation Morikawa , T & Leggett , J M 2008 , ' Isozyme polymorphism and genetic differentiation in natural populations of an endemic tetraploid species Avena maroccana in Morocco ' Genetic Resources and Crop Evolution , vol 55 , no. 8 , pp. 1313-1321 . , 10.1007/s10722-008-9330-1 en
dc.identifier.other PURE: 102378
dc.identifier.other dspace: 2160/2309
dc.identifier.uri http://hdl.handle.net/2160/2309
dc.identifier.uri http://www.springerlink.com/content/n18578126x7g0430/fulltext.pdf en
dc.description Morikawa, T., Leggett, J. M. (2008). Isozyme polymorphism and genetic differentiation in natural populations of an endemic tetraploid species Avena maroccana in Morocco.  Genetic Resources and Crop Evolution, 55, (8), 1313-1321. IMPF: 00.97 RONO: 1700 3118 en
dc.description.abstract A wild tetraploid oat Avena maroccana Gdgr. was collected from the 11 populations in the periphery of Rommani and Casablanca geographic groups of Morocco. Genetic diversity of the species was investigated using six allozyme systems. Allelic frequencies were scored representing eight polymorphic and five monomorphic loci. Coefficient of gene differentiation (Gst) was 0.3019, which indicated great genetic differentiation. The number of alleles per locus was 2.6154, the percentage of polymorphic loci was 61.54, and the expected heterozygosity was 0.2462 in all populations. Genetic diversity in A. maroccana was high in comparison to self-pollinated species. In total, nine heterozygotes resulting from outcrossing were found in the progeny from M1, M3, M4, M22 and M26. The population of M7 had peculiar alleles Pgd–2SS and Pgd-1SS in high frequency. M9 had the lowest level of diversity out of the 11 populations. Geographic and genetic distances between all the populations were not significantly correlated with each other (r = 0.0996). Cluster analysis showed that two groups, (M1, M22, M2 and M4) and (M3, M23, M8, M5 and M26) were apparently differentiated. Two populations of the Casablanca group, M7 and M9 were independent from each other, and were separated distinctly from the other populations. Genetic diversity of the Rommani and Casablanca groups was almost the same in all the parameters. This was due to the similar man-made habitat such as roadside or rich fertile soil and brown clay soils. The population size of A. maroccana was small and restricted to the narrow central Morocco with great genetic differentiation so that genetic diversity may be reflected from the results of genetic drift and outcrossing heterozygote segregation. en
dc.format.extent 9 en
dc.language.iso eng
dc.relation.ispartof Genetic Resources and Crop Evolution en
dc.title Isozyme polymorphism and genetic differentiation in natural populations of an endemic tetraploid species Avena maroccana in Morocco en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1007/s10722-008-9330-1
dc.contributor.institution Aberystwyth University en
dc.contributor.institution Institute of Biological, Environmental and Rural Sciences en
dc.description.status Peer reviewed en


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