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Hybridization between whiptail lizards in Texas : Aspidoscelis laredoensis and A. gularis, with notes on reproduction of a hybrid

by: Cole, Charles J., author

Publication date: 2020

Usage: Attribution-NonCommercial-ShareAlike 4.0 International

Topics: Aspidoscelis laredoensis, Hybridization, Genetics, Reproduction, Aspidoscelis gularis, Aspidoscelis sexlineatus, Aspidoscelis, Parthenogenesis in animals, Cloning, Lizards, Reptiles, Aspidoscelis laredoensis -- Hybridization, Aspidoscelis laredoensis -- Genetics, Aspidoscelis laredoensis -- Reproduction, Aspidoscelis gularis -- Hybridization, Aspidoscelis sexlineatus -- Hybridization, Aspidoscelis -- Hybridization -- Texas, South, Parthenogenesis in animals -- Texas, South, Aspidoscelis -- Cloning -- Texas, South, Aspidoscelis -- Texas, South -- Reproduction, Lizards -- Hybridization -- Texas, South, Lizards -- Texas, South -- Genetics, Lizards -- Texas, South -- Reproduction, Reptiles -- Hybridization -- Texas, South, Reptiles -- Texas, South -- Genetics, Reptiles -- Texas, South -- Reproduction, Genetics, Reptiles, Reproduction

Publisher: New York, NY : American Museum of Natural History

Collection: biodiversity; americanmuseumnaturalhistory

Contributor: American Museum of Natural History Library

Language: English

Rights: http://biodiversitylibrary.org/permissions

Rights-holder: American Museum of Natural History Library

Volume: no. 3947

13 pages : 26 cm

Karyotypes and allozyme data for 32 genetic loci overwhelmingly support the conclusion that Aspidoscelis laredoensis is a diploid all-female species that had a hybrid origin between A. gularis x A. sexlineatus. Comparisons of allozymes in individuals representing three mother-to-daughter generations raised in the laboratory suggest that they reproduce by parthenogenetic cloning. In addition to two previously described morphotypes (pattern classes A and B) that occur in southern Texas, we report the existence of three all-female clonal lineages based on allozymes. Individuals of at least one of these lineages occasionally hybridize in nature with males of A. gularis, producing viable and healthy triploid offspring that can grow to adulthood, one of which herself produced an offspring in the laboratory and could have represented a new, clonal triploid species. The possibility exists that cloned offspring of triploid hybrids are present in South Texas and/or northern Mexico, awaiting discovery. These would represent a new species that would appear to be very similar to A. laredoensis

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"March 6, 2020."

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Includes bibliographical references (pages 10-12)

Abstract: Karyotypes and allozyme data for 32 genetic loci overwhelmingly support the conclusion that Aspidoscelis laredoensis is a diploid all-female species that had a hybrid origin between A. gularis x A. sexlineatus. Comparisons of allozymes in individuals representing three mother-to-daughter generations raised in the laboratory suggest that they reproduce by parthenogenetic cloning. In addition to two previously described morphotypes (pattern classes A and B) that occur in southern Texas, we report the existence of three all-female clonal lineages based on allozymes. Individuals of at least one of these lineages occasionally hybridize in nature with males of A. gularis, producing viable and healthy triploid offspring that can grow to adulthood, one of which herself produced an offspring in the laboratory and could have represented a new, clonal triploid species. The possibility exists that cloned offspring of triploid hybrids are present in South Texas and/or northern Mexico, awaiting discovery. These would represent a new species that would appear to be very similar to A. laredoensis.