SYSTEMATICS OF THE GENUS SIGMODON: DNA SEQUENCES FROM BETA-FIBRINOGEN AND CYTOCHROMEb
- 1 September 2005
- journal article
- Published by Southwestern Association of Naturalists in The Southwestern Naturalist
- Vol. 50 (3), 342-349
- https://doi.org/10.1894/0038-4909(2005)050[0342:sotgsd]2.0.co;2
Abstract
Nucleotide sequences from intron 7 of the beta-fibrinogen gene (Fgb-I7) were used to evaluate phylogenetic relationships among members of the genus Sigmodon. In addition, these sequences were combined with mitochondrial cytochrome-b sequences and analyzed from a total evidence perspective. Results from parsimony and Bayesian analyses indicated support for 3 species groups (alstoni, fulviventer, and hispidus). A sister relationship was depicted for S. alleni and S. hirsutus, followed by the addition of S. toltecus; however, little resolution was provided for relationships between other members of the hispidus species group. Secuencias nucleótidas del intrón 7 del gene beta-fibrinogen (Fgb-I7) fueron usadas para evaluar las relaciones filogenéticas entre los miembros del género Sigmodon. Además, estas secuencias fueron combinadas con secuencias del cytochrome-b mitocondrial y analizadas desde una perspectiva de evidencia total. Resultados de los análisis de parsimonia y de Bayes indicaron apoyo para 3 grupos de especies (alstoni, fulviventer y hispidus). S. alleni y S. hirsutus resultaron hermanas, y a este grupo se le añade S. toltecus, sin embargo, poca resolución fue obtenida entre otros miembros del grupo de especies de hispidus.Keywords
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