Ecology of Sceloporus undulatus speari (Sauria: Phrynosomatidae) from North-Central Chihuahua, Mexico
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Cytonuclear genetic structure of a hybrid zone in lizards of the Sceloporus grammicus complex (Sauria, Phrynosomatidae).
Lizards of the Sceloporus grammicus complex are comprised of multiple chromosome races that form several zones of parapatric hybridization in central Mexico. We scored diagnostic mitochondrial DNA (mtDNA) haplotypes and autosomal chromosome markers in a sample of 342 lizards from one well-defined zone between 2n = 34 and 2n = 46 races. A two-part analysis was performed on this data set in an at...
متن کاملSpecies Limits, Phylogenetic Relationships, and Origins of Viviparity in the Scalaris Complex of the Lizard Genus Sceloporus (Phrynosomatidae: Sauria)
We electrophoretically assayed 32 gene loci in the Sceloporus scalaris complex. We sampled 208 animals from 22 localities representing the following: Sceloporus aeneus (12 localities), S. bicanthalis (five localities), S. chaneyi (one locality), S. goldmani (one locality), and S. scalaris samcolemani (two localities), and we used Sceloporus parvus and S. variabilis as outgroups. Of the 32 gene ...
متن کاملPhylogenetic relationships of phrynosomatid lizards based on nuclear and mitochondrial data, and a revised phylogeny for Sceloporus.
Phrynosomatid lizards are among the most common and diverse groups of reptiles in western North America, Mexico, and Central America. Phrynosomatidae includes 136 species in 10 genera. Phrynosomatids are used as model systems in many research programs in evolution and ecology, and much of this research has been undertaken in a comparative phylogenetic framework. However, relationships among man...
متن کاملCytogenetic Analysis of Chromosomal Intermediates from a Hybrid Zone between Two Chromosome Races of the Sceloporus Grammicus Complex (sauria, Phrynosomatidae).
Underdominance for chromosomal rearrangements is the central assumption of several models of chromosomally based speciation including the cascade model, proposed for the Sceloporus grammicus complex. Several cytotypes of the S. grammicus complex hybridize at localities in central México. A hybrid zone between two of the most chromosomally divergent races (= cytotypes) of S. grammicus (F5, 2n = ...
متن کاملDynamics of a Novel Chromosomal Polymorphism within a Hybrid Zone between Two Chromosome Races of the Sceloporus Grammicus Complex (sauria, Phrynosomatidae).
Several chromosome races of the mesquite lizard, Sceloporus grammicus complex, hybridize at localities in central Mexico. In most cases, the hybridizing populations are delineated by centric fissions at one or more of the macrochromosomes. One notable exception is the Tulancingo hybrid zone between the F5 and FM2 cytotypes. In addition to fission and/or inversion differences at chromosomes 1, 3...
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تاریخ انتشار 2017