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The Quintessential NaturalistHonoring the Life and Legacy of Oliver P. Pearson$
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Douglas Kelt and Deborah Kaspin

Print publication date: 2007

Print ISBN-13: 9780520098596

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520098596.001.0001

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PRINTED FROM CALIFORNIA SCHOLARSHIP ONLINE (www.california.universitypressscholarship.com). (c) Copyright University of California Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CALSO for personal use.date: 24 July 2021

Phylogeography of the Tuco-Tuco Ctenomys Pearsoni: mtDNa Variation and its Implication for Chromosomal Differentiation

Phylogeography of the Tuco-Tuco Ctenomys Pearsoni: mtDNa Variation and its Implication for Chromosomal Differentiation

Filogeografia Del Tuco-Tuco Ctenomys Pearsoni: VariaciÓn En El Mtadn Y Sus Implicaciones Para La DiferenciaciÓn CromosÓmica

Chapter:
(p.859) Phylogeography of the Tuco-Tuco Ctenomys Pearsoni: MTDNa Variation and its Implication for Chromosomal Differentiation
Source:
The Quintessential Naturalist
Author(s):

Ivanna H. Tomasco

Enrique P. Lessa

Publisher:
University of California Press
DOI:10.1525/california/9780520098596.003.0025

This chapter analyzes variation in the mitochondrial control region of the Ctenomys pearsoni throughout the distribution of this species, and shows that all variable populations and chromosomal forms are polyphyletic in their mitochondrial DNA. It notes that these results are incompatible with scenarios which entail the fixation by drift of negatively heterotic chromosomal rearrangements in this species because, under such scenarios, the monophyly of mitochondrial DNA of different chromosomal forms is expected. The chapter observes that C. pearsoni shows a broad pattern of isolation by distance and no consistent indication of possible departures from neutrality or historical demographic changes. It suggests that the species has occupied its current distribution for considerable time.

Keywords:   mitochondrial control region, Ctenomys pearsoni, DNA, chromosomal rearrangements, historical demographic changes

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