Analysis of Sex Chromosome Evolution in the Clade Palaeognathae from Phased Genome Assembly.

ABSTRACT: Birds in the clade Palaeognathae, excluding Tinamiformes, have morphologically conserved karyotypes and less differentiated ZW sex chromosomes compared with those of other birds. In particular, the sex chromosomes of the ostrich and emu have exceptionally large recombining pseudoautosomal regions (PARs), whereas non-PARs are classified into two strata according to the date of their origins: stratum 0 and stratum 1 (S1). However, the construction and analysis of the genome sequences in these regions in the clade Palaeognathae can be challenging because assembling the S1 region is difficult owing to low sequence diversity between gametologs (Z-linked and W-linked sequences). We addressed this issue by applying the Platanus-allee assembler and successfully constructed the haplotype-resolved (

SUBMITTER: Okuno M 

PROVIDER: S-EPMC8599748 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature