Linked Life Data

18500652

Source:http://linkedlifedata.com/resource/pubmed/id/18500652

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2009-3-2
pubmed:abstractText
The karyotype of the finless eel Dalophis imberbis was investigated by conventional (C and replication banding, CMA(3) fluorescence) and molecular (FISH with 45S rDNA probe) techniques. The diploid chromosome number was 2n = 46 and the karyotype consisted of four pairs of meta-submetacentric and 18 pairs of subtelo-acrocentric autosomes and a pair of sex chromosomes heteromorphic in females, composed by a large subtelocentric Z, and a medium sized acrocentric W chromosome; in males this pair was composed by two large subtelocentric ZZ chromosomes. Multiple NORs have been localized by FISH and have been found to be CMA(3) positive; one of the NORs was located on the W chromosome and it was found transcriptionally active by silver staining. The Z chromosome contained distinct intercalar C-positive heterochromatin and W was almost completely heterochromatic. Our report contributes to the knowledge to the cytotaxonomy of Anguilliformes where differentiated sex chromosomes are reported in about a quarter of the species: both male and female heterogamety as well as a multiple chromosome system have been reported. Moreover, this is the first anguilliform species in which multiple NORs have been reported.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
1573-6857
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
135
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
283-8
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
A ZZ-ZW sex chromosome system in the finless eel Dalophis imberbis (Anguilliformes, Ophichtidae).
pubmed:affiliation
Dipartimento di Biologia animale ed Ecologia, Università di Cagliari, Viale Poetto 1, 09126, Cagliari, Italy. salvador@unica.it
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't