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| Fregonezi,Jéferson N.; Torezan,José M.D.; Vanzela,André L.L.. |
| The Asteraceae, one of the largest families of flowering plants, contains about 1,100 genera and 20,000 species, and is well known for its extensive karyotypic variation. In this study, conventional Feulgen staining, C-CMA3 banding, and fluorescence in situ hybridization with a 45S rDNA probe were used to determine the chromosome number and the number and physical position of GC-rich heterochromatin and 45S rDNA sites in three Asteraceae weed species (Crepis japonica, Galinsoga parviflora and Chaptalia nutans). The three species exhibited karyotype differences in the chromosome number and shape, as a commom feature of Asteraceae. However, the 45S rDNA sites always occurred on the short chromosomal arms, associated with GC-heterochromatin. Althought of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: CMA3; FISH; Heterochromatin; Polyploidy; 45S rDNA. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000200016 |
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| Aguilar,Cecilia Teixeira de; Galetti Junior,Pedro Manoel. |
| Among the anostomid fishes, the genus Leporellus is represented by only three species: L. nattereri, endemic of the Amazon River, L. retropinnis, endemic of the Piracicaba River, and L. vittatus, widely distributed in rivers from Peru, Colombia, Guianas, and different major hydrographic basins of Brazil. A cytogenetic study carried out on specimens of Leporellus vittatus from three major Brazilian hydrographic basins evidenced a karyotype of 54 metacentric and submetacentric chromosomes. C-banding analysis revealed the presence of large pericentromeric heterochromatic segments in all chromosomes and a telomeric block coincident with the NOR sites. Ag, CMA3 or MM staining, and FISH with ribosomal probes located the 45S ribosomal genes on the terminal region... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Karyotype; C-bands; 45S rDNA; 5S rDNA. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200004 |
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| Hwang,Yoon-Jung; Song,Chang-Min; Younis,Adnan; Kim,Chang-Kil; Kang,Yoon-Im; Lim,Ki-Byung. |
| BACKGROUND: This study was performed to investigate the phenotypic, karyomorphological, and habitat environment characteristics of Lilium distichum that grows naturally in South Korea. Currently, this species follows limited distribution areas and its natural populations are at the brink of extinction mainly due to fragmentation or destruction its natural habitat. RESULTS: This species was distributed between approximately 1,000 and 1,500 m above sea level with an average temperature of 22°C. The soil characteristics surrounding the natural habitats included loamy and silt loam soils having organic matter content (10.82%), pH (5.22), electrical conductivity (EC) (0.37 dS/m), total nitrogen (0.45%), and cation exchange capacity (34.3 cmol+/kg). The peak... |
| Tipo: Journal article |
Palavras-chave: Chromosome; Karyotype; Habitat; Korea; 5S rDNA; 45S rDNA. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2015000100008 |
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