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http://ciatej.repositorioinstitucional.mx/jspui/handle/1023/618| Mexican Geophytes III. Cytotypes and meiotic behavior in Mexican population of species of Echeandia (Anthericaeceae) | |
| MARIA GUADALUPE ANTONIA PALOMINO Y HASBACH Francisco Javier Martínez Ramón RODRIGO BARBA GONZALEZ IGNACIO MENDEZ RAMIREZ Benjamín Rodríguez-Garay | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| "Echandia Ortega includes about 85 perennial herbaceous species. The subgenus Echeandia is distributed from USA, to Argentina and Chile, Mexico is considered to be the genus center of origin and diversity. Echeandia is considered as a monobasic genus whit x = 8. Diploid plants (2n = 16, n =8, x = 8)have been reported for 35 species of Echeandia. Chromosome numbers for 22 polyploid species for the genus have been the reported (4x, 5x, 6x, 8x, 10x and 11x-4). Thgese reports detail karyotype meiotic chromosome behavior and, pollen fertility of 23 populations of eight species: Echeandia echeandioides, E. hintonii, E. mexicana, E. montalbanesis, E. nana, E. karyotipe that varied among populations of the same species. Spontaneous heterozygotic exchange in species and cytotypes of Echeandia have a common behavior pattern in karyotype variation. The exchanges were observed in heteromorphic pairs of vhromosomes with satellites, and, in metacentric, submetacentric and subtelocentric chromosomes. The origin of these rearrangements was evident in heteromorphic bivalents (IIs) and quadrivalents (IVs) observed in MI. Additional evidence for translocations and chromatid exchange comes from the low level of meiotic irregularitiesobserved in anaphase I (AI), including U-type bridges, side arm bridges and lagging follow a behavior patterncommon to species and cytotypes of Echeandia, And these chromosome aberrations have played a major role in evolution of the genus, providing a larger potential of colonization and distribution in new habitats." | |
| Global Science Books | |
| 20-12-2012 | |
| Artículo | |
| Floriculture and Ornamental Biotechnology 6 (Special Issue 1), 140-152 | |
| Inglés | |
| BIOLOGÍA Y QUÍMICA | |
| Versión aceptada | |
| acceptedVersion - Versión aceptada | |
| Aparece en las colecciones: | ARTICULOS |
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| Fichero | Tamaño | Formato | |
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| FOB_6(SI1)140-152o.pdf | 2.44 MB | Adobe PDF | Visualizar/Abrir |