Estudio citológico de plantas autotetraploides de frijol (Phaseolus vulgaris)

Vista sencilla de ítem
dc.creatorMonge Serrano, F.
dc.creatorMoh, C.C.
dc.date2025-08-21T13:45:39Z
dc.date2025-08-21T13:45:39Z
dc.date1963-01
dc.date.accessioned2026-06-09T02:29:02Z
dc.descriptionBy treating the shoot apices of twenty young bean seedlings (Phaseolus vulgaris, 2n = 22) with 0.2% colchicine solution for 20 hours, an autotetraploid sector was obtained from a treated plant. Two seeds were produced from this sector, and the chromosome number of the radicles of these two seeds was cytologically identified as 4n = 44. As compared with the diploid, some degree of gigantism was observed in these two 4n plants. The plants, the leaves, the stomata and the pollen grains were larger than those of the diploid. The 4n plants also had a prolonged reproductive period. About 50% of the pollen grains of the 4n plant showed intense staining with lactophenol-anilin blue, while almost 100% of the pollen grains of the 2n plants showed intense staining. No cells with more than 10 or less than 5 quadrivalents were observed in the pollen mother cells (PMC) in the 4n plants. The average number of quadrivalents per PMC was 7.3 which indicates that an average of 66% of the chromosomes form quadrivalents. The formation of bivalents in the 4n plants occurred in pairs from groups of the four homologues. This explains the high frequency of PMCs with even numbers of bivalents. The frequency of PMCs with univalents was of the same order as that of PMCs with trivalents, suggesting that in the majority of cases, the production of a univalent was due to the formation of a trivalent from the four homologues.
dc.format8 páginas
dc.formatapplication/pdf
dc.identifierhttps://repositorio.catie.ac.cr/handle/11554/13732
dc.identifieropenAccess
dc.identifier.urihttp://hdl.handle.net/123456789/10326
dc.languagees
dc.publisherInstituto Interamericano de Ciencias Agrícolas (IICA)
dc.relationTurrialba; Vol.13, no. 1
dc.subjectEstudio biológico||biological surveys||undefined||enquête biologique
dc.subjectCitología||cytology||Citologia||cytologie
dc.subjectPlanta||plants||planta||plante
dc.subjectAutotetraploidía||autotetraploidy||autotetraploidia||autotétraploïdie
dc.subjectFríjol||beans||undefined||haricot
dc.subjectPhaseolus vulgaris||Phaseolus vulgaris||Phaseolus vulgaris||Phaseolus vulgaris
dc.subjectLigamiento genético||genetic linkage||undefined||liaison génétique
dc.subjectSede Central
dc.titleEstudio citológico de plantas autotetraploides de frijol (Phaseolus vulgaris)
dc.typeArtículo

Archivos

Colecciones

Investigación