Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Meiotic chromosomes and stages of sex chromosome evolution in fish: zebrafish, platyfish and guppy
Autore:
Traut, W; Winking, H;
Indirizzi:
Med Univ Lubeck, Inst Biol, D-23538 Lubeck, Germany Med Univ Lubeck Lubeck Germany D-23538 nst Biol, D-23538 Lubeck, Germany
Titolo Testata:
CHROMOSOME RESEARCH
fascicolo: 8, volume: 9, anno: 2001,
pagine: 659 - 672
SICI:
0967-3849(2001)9:8<659:MCASOS>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
SYNAPTONEMAL COMPLEX-ANALYSIS; FLY MEGASELIA-SCALARIS; NEO-Y CHROMOSOME; DIFFERENTIATION; DNA; HYBRIDIZATION; KARYOTYPE; SEQUENCES; RERIO; GENES;
Keywords:
comparative genomic hybridization; fish cytogenetics; sex chromosomes; sex determination; synaptonemal complex;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Traut, W Med Univ Lubeck, Inst Biol, D-23538 Lubeck, Germany Med Univ Lubeck Lubeck Germany D-23538 D-23538 Lubeck, Germany
Citazione:
W. Traut e H. Winking, "Meiotic chromosomes and stages of sex chromosome evolution in fish: zebrafish, platyfish and guppy", CHROMOS RES, 9(8), 2001, pp. 659-672

Abstract

We describe SC complements and results from comparative genomic hybridization (CGH) on mitotic and meiotic chromosomes of the zebrafish Danio rerio, the platyfish Xiphophorus maculatus and the guppy Poecilia reticulata. The three fish species represent basic steps of sex chromosome differentiation:(1) the zebrafish with an all-autosome karyotype; (2) the platyfish with genetically defined sex chromosomes but no differentiation between X and Y visible in the SC or with CGH in meiotic and mitotic chromosomes; (3) the guppy with genetically and cytogenetically differentiated sex chromosomes. The acrocentric Y chromosomes of the guppy consists of a proximal homologous and a distal differential segment. The proximal segment pairs in early pachytene with the respective X chromosome segment. The differential segment isunpaired in early pachytene but synapses later in an 'adjustment' or 'equalization' process. The segment includes a postulated sex determining regionand a conspicuous variable heterochromatic region whose structure depends on the particular Y chromosome line. CGH differentiates a large block of predominantly male-specific repetitive DNA and a block of common repetitive DNA in that region.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/07/20 alle ore 15:17:51