|
|
|
|
|
| Silva-Pinhati,A.C.O.; Bacci Jr.,M.; Hinkle,G.; Sogin,M.L.; Pagnocca,F.C.; Martins,V.G.; Bueno,O.C.; Hebling,M.J.A.. |
| Leaf-cutting ants of the genera Atta and Acromyrmex (tribe Attini) are symbiotic with basidiomycete fungi of the genus Leucoagaricus (tribe Leucocoprineae), which they cultivate on vegetable matter inside their nests. We determined the variation of the 28S, 18S, and 5.8S ribosomal DNA (rDNA) gene loci and the rapidly evolving internal transcribed spacers 1 and 2 (ITS1 and ITS2) of 15 sympatric and allopatric fungi associated with colonies of 11 species of leafcutter ants living up to 2,600 km apart in Brazil. We found that the fungal rDNA and ITS sequences from different species of ants were identical (or nearly identical) to each other, whereas 10 GenBank Leucoagaricus species showed higher ITS variation. Our findings suggest that Atta and Acromyrmex... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atta; Acromyrmex; Internal transcribed spacer; Leaf-cutting ants; Leucoagaricus; Leucoagaricus gongylophorus. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004001000004 |
| |
|
|
| Bacci Jr.,M.; Miranda,V.F.O.; Martins,V.G.; Figueira,A.V.O.; Lemos,M.V.; Pereira,J.O.; Marino,C.L.. |
| To determine the phylogenetic relationship between sugarcane cultivars and other members of the Saccharinae subtribe, we identified the fast evolving ITS1-5.8S-ITS2 (ITS = internal transcribed spacer; 5.8S = 5.8S ribosomal DNA) region of the sugarcane genome in the Sugarcane Expressed Sequence Tag (SUCEST) genome project database. Parsimony analysis utilizing this region and homologs belonging to the 23 closely related Andropogoneae currently deposited in the GenBank database has shown sugarcane as the sister group of Saccharum sinense. However, because there are few parsimony-informative characters and high homoplasy in the ITS1-5.8S-ITS2 region we were not able to determine with confidence the phylogenetic relationship between sugarcane and some of the... |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572001000100023 |
| |
|
|
|
