Linked Life Data

8394978

Source:http://linkedlifedata.com/resource/pubmed/id/8394978

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1993-9-17
pubmed:abstractText
The distribution of 1731 retrotransposon-hybridizing sequences in the family Drosophilidae has been studied using a 1731 probe from Drosophila melanogaster. Squash blot and Southern blot analyses of 42 species reveal that the 1731 sequences are widespread within both the Sophophora and Drosophila subgenera and are also present in the genera Scaptomyza and Zaprionus. Hence the 1731 retrotransposon family appears to have a long evolutionary history in the Drosophilidae genome. Differences of hybridization signal intensity suggested that the 1731 sequence is well conserved only in the three species most closely related to D. melanogaster (D. simulans, D. mauritiana, and D. sechellia). A survey of insertion sites in numerous different populations of the previous four species by in situ hybridization to polytene chromosomes has shown in all cases both chromocentric hybridizations and a low number of sites (0-5) on the chromosomal arms. This number of sites is among the lowest observed in D. melanogaster and D. simulans when 1731 is compared with other retrotransposon families. In addition, we have observed species-specific patterns of the chromocentric hybridization signal, suggesting rapid modifications of the beta-heterochromatin components since the radiation of the melanogaster subgroup.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0737-4038
pubmed:author
pubmed:issnType
Print
pubmed:volume
10
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
791-803
pubmed:dateRevised
2010-11-18
pubmed:meshHeading
pubmed:year
1993
pubmed:articleTitle
Distribution and conservation of sequences homologous to the 1731 retrotransposon in Drosophila.
pubmed:affiliation
Département Dynamique du Génome et Evolution, Institut J. Monod, CNRS-Université, Paris, France.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't