Resumo

FARIAS-CHAGOYA, Hugo A.; BALLESTEROS-ALMANZA, María L.; ABREGO ARANDA, José L.  e  ARCIGA-SOSA, Marco A.. Chromosome number of two mexican species of the Diospyros genus, zapote prieto (Ebenaceae). Rev. fitotec. mex [online]. 2021, vol.44, n.4, pp.683-685.  Epub 30-Nov-2023. ISSN 0187-7380.  https://doi.org/10.35196/rfm.2021.4.683.

Chromosome counting was carried out in two mexican species of the Diospyros genus, (zapote prieto) of Ebenaceae family, Diospyros xolocotzii Madrigal & Rzed. and Diospyros digyna Jacq. The cytogenetic analysis was performed in somatic cells of root tips pretreated with a saturated solution of para-dichlorobenzene, for 4 h at 4 °C and fixed in Carnoy. The chromosomes staining was obtained with Feulgen and 1 % acetic carmine. The results obtained show that the chromosome number for both species was 2n = 2x = 30, what indicates that these two species are diploid, as the chromosome numbers reported for this genus in most species is 2n = 2x = 30, with a basic number x = 15.

Palavras-chave : Diospyros xolocotzii; Diospyros digyna; chromosome number; diploid.

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