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Morphological variation of genetically confirmed Alouatta Pigra×A. palliata hybrids from a natural hybrid zone in Tabasco, Mexico

Kelaita, Mary A., Cortés‐Ortiz, Liliana·2013·American Journal of Physical Anthropology
DOI 10.1002/ajpa.22196
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Abstract

While hybridization has been reported for a large number of primate taxa, there is a general lack of data on hybrid morphology for wild individuals with known genetic ancestry. A confirmed hybrid zone for the closely related Neotropical primates Alouatta palliata and A. pigra has provided a unique opportunity to study primate hybrid morphological variation. Here we used molecular evidence based on mitochondrial, Y‐chromosome, and autosomal data to assess hybrid ancestry. We conducted univariate and multivariate statistical comparisons of morphometric data collected from individuals both outside and within the hybrid zone in Tabasco, Mexico. Our results show that of all the hybrids detected (N= 128), only 12% of them were approximately genetically intermediate, and none of them were first generation hybrids. Univariate pairwise comparisons among parental individuals, multigenerational backcrossed hybrids, and intermediate hybrids showed that overall, multigenerational backcrossed hybrids resemble the parental species with which they share most of their alleles. Conversely, intermediates were highly variable. Similarly, principal component analysis depicts an overlap between the parental species and their backcrosses when considering overall morphological differences. Finally, discriminant function analysis of the morphological variables was overall unreliable for classifying individuals into their assigned genotypic classes. Taken together, our results suggest that primate natural hybridization studies should incorporate molecular methods for determining ancestry, because morphology may not always be a reliable indicator of hybrid status. Hybrid zones could comprise a large number of multigenerational backcrossed hybrids that are indistinguishable from the parental species. The implications for studying hybridization in the primate fossil record are discussed. Am J Phys Anthropol, 2013. © 2012 Wiley Periodicals, Inc.

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  • Studies of metric morphological traits in wild hybrid populations remain underrepresented in the general primate hybridization literature.

    “However, studies of metric morphological traits in wild hybrid populations, exemplified by the work of Froelich and Supriatna (1996) in macaques and Kelaita and Corte ´sOrtiz (2013) in howlers, remain underrepresented in the general primate hybridization literature.”

    From Morphological Variation in Wild Marmosets (Callithrix penicillata and C. geoffroyi) and Their Hybrids (2014) · cites this paper as Kelaita and Cortés-Ortiz 2013

  • The latter leads to underestimation of actual levels of hybridization (or numbers of hybrids) within a population.

    “The latter leads to underestimation of actual levels of hybridization (or numbers of hybrids) within a population (Ackermann 2010; Kelaita and Corte ´s-Ortiz 2013).”

    From Morphological Variation in Wild Marmosets (Callithrix penicillata and C. geoffroyi) and Their Hybrids (2014) · cites this paper as Kelaita and Corte ´s-Ortiz 2013

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Metadata

Authors
Kelaita, M. A., & Cortés‐Ortiz, L.
Venue
American Journal of Physical Anthropology
Publisher
Wiley
Published
2012-12-07
Volume
150
Issue
2
Pages
223-234
ISSN
  • 0002-9483
  • 1096-8644
DOI
10.1002/ajpa.22196
Cited by
37
References
0
Language
en
Licence
onlinelibrary.wiley.com/termsAndConditions#vor (vor)

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