Description: Viviparous (live-bearing) vertebrates have evolved repeatedly within otherwise oviparous (egg-laying) clades. The oviparity to viviparity transition requires numerous physiological, morphological, and immunological changes to the female reproductive tract, including eggshell reduction; delayed oviposition; placental development for supply of water and nutrition to the embryo by the mother; enhanced gas exchange; and suppression of maternal immune rejection of the embryo. Genomic and transcriptomic analyses of a closely related oviparous–viviparous pair of lizards (Phrynocephalus przewalskii and P. vlangalii) reveal the changes that account for these transitions. In addition, we compared the gene sequences in transcriptomes of four oviparous– viviparous pairs of lizards in different genera to look for possible gene convergence at the sequence level.

Data type: Genome sequencing and assembly; Raw sequence reads; Transcriptome or Gene expression

Sample scope: Multispecies

Relevance: Evolution

Release date: 2018-12-10

Last updated: 2018-12-10

Data size: 251.81GB