SciELO - Scientific Electronic Library Online

 
vol.81 número3Podemos proteger especies en riesgo en áreas protegidas? Un estudio de caso del genero Pinus en MéxicoPredicción de la distribución de un parásito usando el modelo de nicho ecológico, GARP índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Revista mexicana de biodiversidad

versión On-line ISSN 2007-8706

Resumen

SOTUYO, Solange et al. Phylogeography of the Caesalpinia hintonii complex (Leguminosae: Caesalpinioideae: Poincianella). Rev. Mex. Biodiv. [online]. 2010, vol.81, n.3, pp. 883-894. ISSN 2007-8706.

Although many phylogeographic studies have been conducted to analyze the genetic and phylogeographic structure of Mexican species, such studies are nearly absent for plants of dry seasonal forest, precincts with high level of endemism. To better understand this areas, we undertook a phylogeographic study and dating were carried out on the Caesalpinia hintonii complex distributed in the Río Balsas Depression and Tehuacán-Cuicatlán Valley. The phylogeographic structure was determined analyzing sequences from 4 plastid regions (trnL, trnL-F, psbA-trnH and accD-psaI) in all populations. A nonparametric rate smoothing (NPRS) method was employed to estimate the time of origin of the species complex. Haplotypic (0.64-1) and the nucleotide differences (3.8-11.52) were high in all species. The morphologically indistinct C. oyamae populations are genetically structured and showed 3 haplogroups where gene flow is low; considered them here as cryptic entities. The C. hintonii populations are genetically close-knit, even though they are morphologically distinct. The populations of C. macvaughii exhibit 2 divergent lineages with gene flow (Nm=1.41). Divergence events in 2 lineages between east and west from Rio Balsas Depression can be explained by geologic events. Our results showed that the C. hintonii complex is under diversification and in some cases morphostatic radiation.

Palabras llave : Río Balsas Depression; cryptic species; dating; trnL; trnL-F; psbA-trnH; accD-psaI; Mexico; Tehuacán-Cuicatlán Valley.

        · resumen en Español     · texto en Español     · pdf en Español