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Abstract Detail


Genetics Section

Mahé, Frédéric [1], Sinou, Carole [1], Pasquet, Rémy [2], Misset, Marie-thérèse [3], Ainouche, Abdelkader [4].

Identification of Ty1-copia retrotransposon families in Lupinus by isolation and phylogenetic analysis of reverse transcriptase sequences.

TRANSPOSABLE elements, particularly retrotransposons, may account for much in the structural and functional evolutionary dynamics of the plant genomes, and may provide a new potential for adaptive response to environmental changes and species diversification. In this context, reverse transcriptase (RT) sequences from class I Ty1-copia retrotransposons have been amplified, cloned, and sequenced for the first time in lupine species. These sequences showed a high similarity level (51 to 86%) with the corresponding RT-sequences of other legume genera such as Cicer and Vigna. Sequence and phylogenetic analyses of these RT-fragments provide a picture of their diversity in Lupinus, and reveal that they belong to at least two different lineages, with evidence that they were already present in the lupine ancestor and most likely in earlier papilionoid legumes.[c.e.:srb]


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1 - UMR-CNRS Ecobio, Ecologie Evolutive, Université de Rennes-1, Campus Scientifique de Beaulieu, Bât 14A, Rennes, 35042, FRANCE
2 - International Center of Insect Physiology and Ecology, Institut Recherche Développement, PO Box 30772, Nairobi, , Kenya
3 - 1969 Loring Ave., San Diego, California, 92109-1406
4 - Umr-Cnrs 6553, Avenue Du Général Leclerc, Campus S, Rennes, F-35042, France

Keywords:
Lupinus
Ty1-copia retrotransposon
Reverse Transcriptase
evolution.

Presentation Type: Poster:Posters for Sections
Session: 48-85
Location: Auditorium/Bell Memorial Union
Date: Tuesday, August 1st, 2006
Time: 12:30 PM
Abstract ID:450


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