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Chromosomal organization and phylogenetic relationships in Hypochaeris species (Asteraceae) from Brazil Genet. Mol. Biol.
Ruas,Claudete de Fátima; Vanzela,André L.L.; Santos,Melissa O.; Fregonezi,Jeferson N.; Ruas,Paulo Maurício; Matzenbacher,Nelson I.; Aguiar-Perecin,Margarida L.R. de.
The association of cytogenetic and molecular techniques has contributed to the analysis of chromosome organization and phylogeny in plants. The fluorochrome GC-specific CMA3, fluorescent in situ hybridization (FISH) and RAPD (Random Amplified Polymorphic DNA) markers were used to investigate chromosome structure and genetic relationships in Hypochaeris (Asteraceae). Seven species native to South America, and two species introduced from Europe (H. glabra and Hypochaeris sp) were studied. FISH with rDNA probes identified one or two loci of 18S-5.8S-25S rDNA in the South American Hypochaeris species and one locus in the European species. Only one 5S rDNA locus was seen in all species studied. Blocks of GC-rich heterochromatin (CMA-positive bands) associated...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chromosome banding; FISH; Hypochaeris; Phylogenetic relationship; RAPD.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000100023
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