The origin and evolution of parthenogenesis in the Heteronotia binoei complex: Synthesis

Moritz C. (1993) The origin and evolution of parthenogenesis in the Heteronotia binoei complex: Synthesis. Genetica, 90 2-3: 269-280. doi:10.1007/BF01435044


Author Moritz C.
Title The origin and evolution of parthenogenesis in the Heteronotia binoei complex: Synthesis
Journal name Genetica   Check publisher's open access policy
ISSN 0016-6707
Publication date 1993-01-01
Sub-type Article (original research)
DOI 10.1007/BF01435044
Open Access Status Not Open Access
Volume 90
Issue 2-3
Start page 269
End page 280
Total pages 12
Publisher Kluwer Academic Publishers
Subject 1311 Genetics
1105 Dentistry
Abstract The Heteronotia binoei complex includes several cryptic species of sexually reproducing lizards and parthenogenetic lineages derived from them. This paper synthesizes analyses of distribution and variation of allozymes, chromosomes, mitochondrial DNA and ribosomal DNA genes in order to make inferences about the origins of the parthenogenetic lineages, the extent and source of their genetic diversity, their current and historical biogeography and their ecological properties. The parthenogens appear to have arisen recently (relative to geographic differentiation within the sexual taxa) via episodes of repetitive hybridization between two of the sexual taxa. These events probably occurred within one or two small geographic areas of western Australia, after which some of the parthenogenetic lineages rapidly expanded their ranges to central Australia. The parthenogenetic form has extraordinarily high genetic diversity, mostly derived from the repetitive origins, but with some contribution from mutation and biased gene conversion/recombination being apparent. The rapid and extensive range expansion of the parthenogenetic lineages from western to central Australia attests to the short-term success of this reproductive strategy, in this case perhaps reinforced by the parthenogenetic females having higher fecundity than their smaller sexual relatives. However, the parthenogens are orders of magnitude more susceptible to infection by ectoparasitic mites, suggesting that they could be at a long-term disadvantage. The detailed characterization of this system provides a basis for critical evaluation of hypotheses about the evolutionary advantage of sexual reproduction derived from broad comparative studies.
Keyword gekkonidae
genetic variation
mitochondrial DNA
parthenogenesis
sexual reproduction
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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