Advanced

Contact zones and species limits: Hybridization between lineages of the California Newt, Taricha torosa, in the southern Sierra Nevada

Kuchta, Shawn LU (2007) In Herpetologica 63(3). p.332-350
Abstract
Recent phylogeographic work on Taricha torosa has revealed that the subspecific lineages, T. t. torosa and T. t. sierrae, are distinct evolutionary lineages that form a secondary contact zone in the southern Sierra Nevada of California. I examined the dynamics of this contact zone using two allozyme markers, mitochondrial DNA, morphometrics (head shape), and head color pattern. The subspecific lineages interbreed where they meet, and form a hybrid zone centered along the Kaweah River in Tulare County. Clines among genetic markers bad similar shapes and centers, and ranged from 7-10 km wide. There is evidence of selection against hybrid genotypes in the center of the hybrid zone. Analyses of head shape and color pattern show that the two... (More)
Recent phylogeographic work on Taricha torosa has revealed that the subspecific lineages, T. t. torosa and T. t. sierrae, are distinct evolutionary lineages that form a secondary contact zone in the southern Sierra Nevada of California. I examined the dynamics of this contact zone using two allozyme markers, mitochondrial DNA, morphometrics (head shape), and head color pattern. The subspecific lineages interbreed where they meet, and form a hybrid zone centered along the Kaweah River in Tulare County. Clines among genetic markers bad similar shapes and centers, and ranged from 7-10 km wide. There is evidence of selection against hybrid genotypes in the center of the hybrid zone. Analyses of head shape and color pattern show that the two subspecies are phenotypically differentiated, and that patterns of differentiation in these characters are congruent with the genetic clines. The two subspecies constitute distinct evolutionary lineages and merit recognition as separate species: T. torosa (California newt) and T. sierrae (Sierra newt). (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
hybridization, restriction fragment length polymorphism, Taricha, MtDNA, hybrid zone, metapopulation lineage concept, general, evolutionary species concept, alloyzme, contact zone
in
Herpetologica
volume
63
issue
3
pages
332 - 350
publisher
Herpetologists' League
external identifiers
  • wos:000250133300010
  • scopus:35549011387
ISSN
0018-0831
DOI
10.1655/0018-0831(2007)63[332:CZASLH]2.0.CO;2
language
English
LU publication?
yes
id
87b2c7a4-193f-4bc4-97db-ae5a90ede205 (old id 655282)
date added to LUP
2007-12-12 15:53:42
date last changed
2017-01-01 07:17:42
@article{87b2c7a4-193f-4bc4-97db-ae5a90ede205,
  abstract     = {Recent phylogeographic work on Taricha torosa has revealed that the subspecific lineages, T. t. torosa and T. t. sierrae, are distinct evolutionary lineages that form a secondary contact zone in the southern Sierra Nevada of California. I examined the dynamics of this contact zone using two allozyme markers, mitochondrial DNA, morphometrics (head shape), and head color pattern. The subspecific lineages interbreed where they meet, and form a hybrid zone centered along the Kaweah River in Tulare County. Clines among genetic markers bad similar shapes and centers, and ranged from 7-10 km wide. There is evidence of selection against hybrid genotypes in the center of the hybrid zone. Analyses of head shape and color pattern show that the two subspecies are phenotypically differentiated, and that patterns of differentiation in these characters are congruent with the genetic clines. The two subspecies constitute distinct evolutionary lineages and merit recognition as separate species: T. torosa (California newt) and T. sierrae (Sierra newt).},
  author       = {Kuchta, Shawn},
  issn         = {0018-0831},
  keyword      = {hybridization,restriction fragment length polymorphism,Taricha,MtDNA,hybrid zone,metapopulation lineage concept,general,evolutionary species concept,alloyzme,contact zone},
  language     = {eng},
  number       = {3},
  pages        = {332--350},
  publisher    = {Herpetologists' League},
  series       = {Herpetologica},
  title        = {Contact zones and species limits: Hybridization between lineages of the California Newt, Taricha torosa, in the southern Sierra Nevada},
  url          = {http://dx.doi.org/10.1655/0018-0831(2007)63[332:CZASLH]2.0.CO;2},
  volume       = {63},
  year         = {2007},
}