Natural Hybridization Between the Teiid Lizards Cnemidophorus sonorae (Parthenogenetic) and Cnemidophorus tigris (Bisexual)

1 June 1970

journal article
Published by Oxford University Press (OUP) in Systematic Zoology

Vol. 19 (2) , 114-127
https://doi.org/10.2307/2412449

Abstract

Lowe, Charles H. (Dept. Biological Sciences, Univ. Arizona, Tucson, Arizona 85721), et al., 1970. Natural hybridization between the teiid lizards Cnemidophorus sonorae (parthenogenetic) and Cnemidophorus tigris (bisexual). Syst. Zool, 19:114–127.—Hybrid index analysis of two natural hybrids between the parthenogenetic Cnemidophorus sonorae and the bisexual C. tigris demonstrates that the hybrids more strongly resemble the maternal parent. Karyotypic analysis reveals that the hybrids are tetraploids having received three genomes from the maternal (triploid) species and one genome from the paternal (diploid) species. Examination of testicular material shows the formation of chromosomal bivalents and polyvalents, including quadrivalents. Karyotypic variation involving centric fission occurs in the maternal parent C. sonorae. The origin of various levels of polyploidy in the genus Cnemidophorus appears to be rather different from that occurring most frequently in plants.

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