Abstract

Retrouvez des extraits de l’émission au format .mp3:

• Extrait 1 [2'10]: Introduction de l’émission
• Extrait 2 [3'40]: L’extinction des mammouths
• Extrait 3 [3'15]: Les risques d’extinction des éléphants
• Extrait 4 [1'50]: Différences Afrique/Asie
• Extrait 5 [3'15]: Rites mortuaires et société chez les éléphants
• Extrait 6 [0'55]: Génétique et consanguinité

Citation

Molecular phylogeny of living elephants and discussion on infraspecific systematics of Loxodonta africana and Elephas maximus.
Régis Debruyne.
in The world of elephants, Proceedings of the 1st international Congress, 2001. Consiglio Nazionale delle Ricerche, Rome, pp.628-629.

Abstract

This poster communication displays the results of the phylogenetic analyses of new sequencing data from three mitochondrial markers (Cytochrome b, 12S ribosomal DNA and control region genes) among African (both bush and forest forms) and Asian elephants (of every subspecies). Maximum Parsimony (MP) procedure with equal and differential weighting and Maximum Likelihood (ML) analyses were applied to these data sets. To estimate the robustness of MP topologies, Bremer supports and Bootstrap proportions (excluding uninformative sites) were both calculated. Though evolving at different rates, the three markers studied are homogeneous and; depict a shared pattern of differentiation within every species of elephants, the robustness of which increases when data are combined. Within Asian elephants, this pattern accords neither with the geographic distribution nor with the systematic frame. On the contrary, a split between Loxodonta africana africana (bush form) and Loxodonta africana cyclotis (forest form) is recognized although none of these two subspecies is found to be monophyletic.

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Cet article est cité par:

1. Debruyne, 2005. A case study of apparent conflict between molecular phylogenies: the interrelationships of African elephants. Cladistics 21(1):31-50
2. Vaughan et al., 2005. On the Phylogeny and Biogeography of the Genus Oryza. Breeding Science 55:113-122
3. Rautian et al., 2006. Approaches to the resolution of contradictions between phylogenetic reconstructions based on morphofunctional and genetic data. Paleontological Journal 40(4):s508-s523
4. Vaughan, 2008. Phylogeny and Biogeography of the Genus Oryza. in Rice Biology in the Genomics Era. pp219-234