| Abstract Detail
Solanum Taxonomy - Morning Prohens, J. [1], Anderson, Gregory J. [2], Herraiz, F.J. [1], Bernardello, G. [3], Santos-Guerra, A. [4], Crawford, D. [5], Nuez, F. [1]. AFLP diversity among and within populations of the endemic, insular and endangered Solanum vespertilio and S. lidii. SOLANUM vespertilio and S. lidii (Solanum subgenus Leptostemonum) are endangered species endemic to the Canary Islands. Apart from their unique characteristics and ecological value, both species represent genetic resources for eggplant (S. melongena) breeding. The study of the diversity of the extant populations is essential for their in situ and ex situ conservation. We studied the AFLP diversity in a total of 5 populations of S. vespertilio and 3 of S. lidii. Five related species from continental Africa (S. aff. violaceum, S. campylacanthum, S. dasyphyllum, S. delagoense and S. panduriforme) were used as controls. A total of 235 AFLP fragments were scored of which 230 were polymorphic (178 in S. vespertilio and 156 in S. lidii). Results show that S. vespertilio and S. lidii are genetically differentiated (Gst=0.41) from their African relatives and that, although the species are morphologically similar to each other, they are also genetically differentiated (Gst=0.37). Several AFLP fragments are exclusive and universal to all individuals of either S. vespertilio or S. lidii, and therefore have taxonomic value. The total diversity is similar in both species and the number of polymorphic loci within each population is high (between 33.2 and 52.8). Values of genetic differentiation among populations of each species are moderate (Gst=0.28 for S. vespertilio and Gst=0.19 for S. lidii) and there are no AFLP fragments exclusive and universal to all individuals of a given population, suggesting that a genetic flux exists (or existed) among populations. The isolation and fragmentation of the populations, as well as the reduced number of individuals per population, indicates that an important part of this diversity can be lost. Therefore, strategies for the conservation of these species considering their genetic structure and reproductive systems should be implemented. The information presented here can be of utility in designing these strategies.
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1 - Universidad Politécnica de Valencia, Instituto de Conservación y Mejora de la Agrodiversidad Valenciana, Camino de Vera 14, Valencia, Valencia, 46022, Spain
2 - University of Connecticut, Ecology and Evolutionary Biology, 75 North Eagleville Rd., Unit 3043, Storrs, CT, 06269-3043, USA
3 - Universidad Nacional de Córdoba, Instituto Multidisciplinario de Biología Vegetal, c.c. 495, Córdoba, 5000, Argentina
4 - Instituto Canario de Investigaciones Agrarias, Jardín de Aclimatación de la Orotava, Retama 2, Puerto de la Cruz, Tenerife, 38400, Spain
5 - University of Kansas, Ecology and Evolutionary Biology, Lawrence, Kansas, 66045-2106, USA
Keywords:
AFLP
genetic diversity
conservation
population genetic structure
Canary Islands.
Session: SAT02-9
Location: Hall of Ideas Room F/Monona Terrace
Date: Wednesday, July 26th, 2006
Time: 10:15 AM
Abstract ID:112 |
