Conservative genome size and rapid chromosomal evolution in the South American tuco-tucos (Rodentia: Ctenomyidae).
Genome
; 36(3): 449-58, 1993 Jun.
Article
em En
| MEDLINE
| ID: mdl-8349125
Genome size (the amount of DNA per cell) was measured by flow-cytometric analysis in seven species of a chromosomally variable rodent genus: Ctenomys boliviensis, C. conoveri, C. frater, C. leucodon, C. lewisi, C. opimus, and C. steinbachi. The mean genome size of these species was 7.19 pg DNA and little inter- and intra-specific variation was observed. Genome size was not correlated with diploid number, suggesting that chromosomal evolution at this level is independent of total DNA content. A hypothetical taxonomic unit optimization procedure was carried out using genome size change on a Wagner tree derived from allozyme data. Allozyme evolution and genome size change are linked by a weak, but significant, negative correlation suggestive of preferential genic evolution in the absence of genome size evolution.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Roedores
/
Genoma
/
Evolução Biológica
Limite:
Animals
País/Região como assunto:
America do sul
/
Bolivia
Idioma:
En
Revista:
Genome
Assunto da revista:
GENETICA
Ano de publicação:
1993
Tipo de documento:
Article
País de publicação:
Canadá