Evolutionary and demographic history among Maghrebian Medicago species (Fabaceae) based on the nucleotide sequences of the chloroplast DNA barcode trnH-psbA
Data from trnH-psbA intergenic spacer (cpDNA) were analyzed to elucidate molecular evolution within and among Maghrebian species of Medicago. The spacer highlighted a high interspecific variation and a low intraspecific diversity among species. Haplotype and nucleotide diversities revealed high leve...
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Veröffentlicht in: | Biochemical systematics and ecology 2014-08, Vol.55, p.296-304 |
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Sprache: | eng |
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Zusammenfassung: | Data from trnH-psbA intergenic spacer (cpDNA) were analyzed to elucidate molecular evolution within and among Maghrebian species of Medicago. The spacer highlighted a high interspecific variation and a low intraspecific diversity among species. Haplotype and nucleotide diversities revealed high level of variation. Parsimony and median-joining Network methods revealed (1) the segregation into 17 haplotypes; (2) the ancestral behaviour of the annual Medicago minima and (3) the clusters are independent of the geographic origin. The neutral evolution of Wright and Fisher is rejected since the Tajima's D values deviated from 0. Besides, the statistical analyses are in agreement with an evolution into stable populations' size.
•Morrocan and Tunisian Medics were submitted to a demographic and phylogenic study.•trnH-psbA revealed a high level of polymorphism between the Maghrbian species.•At the intraspecific level, this barcode is well conserved.•Demographic scenario was revealed using Tajima's D test and the mismatches. |
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ISSN: | 0305-1978 1873-2925 |
DOI: | 10.1016/j.bse.2014.03.016 |