Genome-wide data implicate terminal fusion automixis in king cobra facultative parthenogenesis.

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

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Dangosydd eitem ddigidol (DOI)

  • Daren C. Card
    University of Texas, Arlington
  • Freek J. Vonk
    Research Team Endless Forms, Naturalis Biodiversity Center, Darwinweg 2, Leiden 2333 CR, The Netherlands.
  • Sterrin Smallbrugge
    Wageningen University
  • Nicholas R. Casewell
    Liverpool School of Tropical Medicine
  • Wolfgang Wüster
  • Todd A. Castoe
    University of Texas, Arlington
  • G.W. Schuett
    Chiricahua Desert Museum
  • Warren Booth
    University of Tulsa
Facultative parthenogenesis (FP) is widespread in the animal kingdom. In vertebrates it was first described in poultry nearly 70 years ago, and since then reports involving other taxa have increased considerably. In the last two decades, numerous reports of FP have emerged in elasmobranch fishes and squamate reptiles (lizards and snakes), including documentation in wild populations of both clades. When considered in concert with recent evidence of reproductive competence, the accumulating data suggest that the significance of FP in vertebrate evolution has been largely underestimated. Several fundamental questions regarding developmental mechanisms, nonetheless, remain unanswered. Specifically, what is the type of automixis that underlies the production of progeny and how does this impact the genomic diversity of the resulting parthenogens? Here, we addressed these questions through the application of next‑generation sequencing to investigate a suspected case of parthenogenesis in a king cobra (Ophiophagus hannah). Our results provide the first evidence of FP in this species, and provide novel evidence that rejects gametic duplication and supports terminal fusion as a mechanism underlying parthenogenesis in snakes. Moreover, we precisely estimated heterozygosity in parthenogenetic offspring and found appreciable retained genetic diversity that suggests that FP in vertebrates has underappreciated evolutionary significance.
Iaith wreiddiolSaesneg
Rhif yr erthygl7271
Nifer y tudalennau9
CyfnodolynScientific Reports
Cyfrol11
Rhif y cyfnodolyn1
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 31 Maw 2021

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