Reference - Detail
| RRC ID | 33246 |
|---|---|
| Author | Ishijima J, Uno Y, Nishida C, Matsuda Y. |
| Title | Genomic structures of the kW1 loci on the Z and W chromosomes in ratite birds: structural changes at an early stage of W chromosome differentiation. |
| Journal | Cytogenet Genome Res |
| Abstract |
The W chromosome of ratite birds shows minimal morphological differentiation and retains homology of genetic linkage and gene order with a substantial stretch of the Z chromosome; however, the molecular structure in the differentiated region is still not well known. The kW1 sequence was isolated from the kiwi as a W-specific DNA marker for PCR-based molecular sexing of ratite birds. In ratite W chromosomes, this sequence commonly contains a ∼200-bp deletion. To characterize the very early event of avian sex chromosome differentiation, we performed molecular cytogenetic analyses of kW1 and its flanking sequences in paleognathous and neognathous birds and reptiles. Female-specific repeats were found in the kW1-flanking sequence of the cassowary (Casuarius casuarius), and the repeats have been amplified in the pericentromeric region of the W chromosomes of ratites, which may have resulted from the cessation of meiotic recombination between the Z and W chromosomes at an early stage of sex chromosome differentiation. The presence of the kW1 sequence in neognathous birds and a crocodilian species suggests that the kW1 sequence was present in the ancestral genome of Archosauria; however, it disappeared in other reptilian taxa and several lineages of neognathous birds. |
| Volume | 142(4) |
| Pages | 255-67 |
| Published | 2014-1-1 |
| DOI | 10.1159/000362479 |
| PII | 000362479 |
| PMID | 24820528 |
| MeSH | Alligators and Crocodiles / genetics Animals Base Sequence Chromosome Mapping Evolution, Molecular Female Male Molecular Sequence Data Palaeognathae / genetics* Sequence Alignment Sequence Analysis, DNA Sex Chromosomes / genetics* Transcription Factors / genetics |
| IF | 1.114 |
| Times Cited | 1 |
| WOS Category | GENETICS & HEREDITY CELL BIOLOGY |
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| Total number of mentions | 2 |
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