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Filogeografía - Clase 1

1era clase: Qué es? Conceptos / Historia y más...

Pedro Romero

on 25 March 2011

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Transcript of Filogeografía - Clase 1

Filogeografía La Primera Research in my laboratory involves use of genetic markers (e.g. from allozymes, microsatellites, and mitochondrial DNA) to analyze the natural histories and evolution of wild animals. Topics range from micro- to macro-evolutionary: genetic parentage, mating patterns, geographic population structure, gene flow, hybridization, introgression, phylogeography, speciation, systematics, and phylogenetics. Research has been conducted on all major groups of vertebrates plus some invertebrates, and has involved taxa from marine, freshwater, and terrestrial environments. The primary goal typically is to unveil ecological, behavioral, or evolutionary features of the organisms themselves; an important secondary concern is to elucidate molecular and evolutionary properties of protein and DNA molecules. “…phylogenetic interrelationships among mtDNA molecules themselves and geographic distributions of the phylogenetic groupings… concerns of a discipline that might be termed intraspecific phylogeography.” (Avise, 1987)
“Phylogeography is a…discipline that deals with the spatial arrangements of genetic lineages, especially within and among closely related species.” (Avise, 2009)
“The study of the principles and processes governing the geographical distribution of genealogical lineages….” (Crisci 2001)
Las leyes de Bergmann Microevolución Evolución debajo del nivel específico
Cambios genéticos dentro de la población
Evolución = Cambios en frecuencia de alelos Los orígenes de la Filogeografía
Un puente entre la macro y micro evolución Macroevolución Evolución sobre el nivel de especie
Especiación, radiación adaptativa, etc
Evolución = formación de nueavas especies Las filogenias intraespecíficas pueden ser inferidas con DNA mitocondrial porque: La molécula entera posee una única historia
Herencia materna
No recombinación
Alta tasa de mutación
1% por millón de años ( >)
Suficientes mutaciones para encontrar linajes dentre de las especies
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