Comparative study (AFLP and morphology) of three species of Prosopis of the Section Algarobia: P. juliflora, P. pallida, and P. limensis. Evidence for resolution of the “P. pallida–P. juliflora complex” |
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Authors: | R A Palacios A D Burghardt J T Frías-Hernández V Olalde-Portugal N Grados L Alban and O Martínez-de la Vega |
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Institution: | (1) Consejo Nacional de Investigaciones Cient?ficas y T?cnicas (CONICET), Buenos Aires, Rep?blica Argentina;(2) Dpto. de Biodiversidad y Biolog?a Experimental Facultad de Cs. Exactas y Naturales, Universidad de Buenos Aires, Pabell?n 2-4? Piso-Laboratorio 10 Int. G?iraldes y Costanera Norte, Ciudad Universitaria, 1428 Buenos Aires, Rep?blica Argentina;(3) Division de Ciencias de la Vida, Departamento de Ciencias Ambientales, Universidad de Guanajuato, Irapuato, Mexico;(4) Departamento de Biotecnolog?a y Bioqu?mica del CINVESTAV-IPN, Unidad Irapuato, Irapuato, Mexico;(5) Unidad de Proyectos Ambientales y Desarrollo Integral, Universidad de Piura, Piura, Peru;(6) Naturaleza y Cultura Internacional, Piura, Peru;(7) LANGEBIO, CINVESTAV-IPN, Unidad Irapuato, Irapuato, Mexico; |
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Abstract: | The problems of delimitation of species of Prosopis originate from the few morphological discontinuities which exist among some of them; some, however, originated as a result
of wide distribution of germplasm without proper knowledge of the species, in particular, much material catalogued as P. juliflora, but being of other species, was distributed for reforestation projects worldwide. This work tests the morphological results
obtained for P. pallida and P. limensis of the Peruvian–Ecuadorian coast and for P. juliflora of the Caribbean Basin of Colombia and Venezuela utilizing a study of AFLPs and a study of the morphology of plantlets developed
in a conventional garden study. The phenogram obtained for the AFLPs demonstrates each of the three species to be a well differentiated
cluster and the molecular variance between them is significantly greater than the variance within each species. Study of the
plantlets also indicates statistically significant differences for four morphological characters between P. juliflora and the other two species (P. pallida and P. limensis). These results, in addition to the morphological differentiation evident between adult plants of P. pallida and P. limensis and the clear separation of these two species from P. juliflora, corroborate the genetic identity of the three taxa analyzed. |
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