New reports of chromosome numbers in Karwinskia (Rhamnaceae)

Authors

  • Fernando Tapia-Pastrana Laboratorio de Genecología, División de Estudios de Posgrado e Investigación, Facultad de Estudios Superiores Zaragoza, UNAM. Apartado Postal 9-020, 15000 México, D.F.
  • Sandra Luz Gómez-Acevedo Laboratorio de Genecología, División de Estudios de Posgrado e Investigación, Facultad de Estudios Superiores Zaragoza, UNAM. Apartado Postal 9-020, 15000 México, D.F.
  • Pedro Mercado-Ruaro Laboratorio de Fanerogamia, Departamento de Botánica, Instituto de Biología, Universidad Nacional Autónoma de México. Apartado postal 70-223, 04510 México, D.F.
  • José Linares Herbario Paul C. Standley, Escuela Agrícola Panamericana, P.O. Box 93, Tegucigalpa.

DOI:

https://doi.org/10.14522/darwiniana.2014.472.57

Keywords:

Chromosomes, Karwinskia, Rhamnaceae

Abstract

A cytogenetic analysis using surface spreading and air drying was performed to analyze the mitotic chromosomes of Karwinskia calderonii, K. parvifolia and K. subcordata. The results confirm a
diploid number 2n = 24 and a basic number x = 12. All species showed a somatic complement characterized by small meta- and submetacentric chromosomes. The smallest pair of each complement carried a secondary constriction and a satellite. Morphological and numerical constancy in the chromosome complements agree with previous studies in other species of the genus. Results suggest some kind of nucleotypic differentiation related to geographic factors as latitude and altitude.

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Published

31-12-2009

How to Cite

Tapia-Pastrana, F., Gómez-Acevedo, S. L., Mercado-Ruaro, P., & Linares, J. (2009). New reports of chromosome numbers in Karwinskia (Rhamnaceae). Darwiniana, Nueva Serie, 47(2), 267–270. https://doi.org/10.14522/darwiniana.2014.472.57

Issue

Vol. 47 No. 2 (2009)

Section

Genetics

License

Licencia de Creative Commons
Starting on 2012, Darwiniana Nueva Serie uses Licencia Creative Commons Atribución-NoComercial 2.5 Argentina .

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