ESTUDIO CARIOLÓGICO DE Quercus laurina Humb. & Bonpl.

Authors

  • Carlos Rafael Hernández-Vital División de Ciencias Forestales, Universidad Autónoma Chapingo
  • José Guadalupe Álvarez-Moctezuma División de Ciencias Forestales, Universidad Autónoma Chapingo
  • Fernando Zavala-Chávez División de Ciencias Forestales, Universidad Autónoma Chapingo
  • Policarpo Espinosa-Robles División de Ciencias Forestales, Universidad Autónoma Chapingo

Keywords:

Karyomorphology, karyotype, oak, Fagaceae, chromosome number, Quercus laurina

Abstract

Oaks (Quercus spp., Fagaceae) are the most important broad-leaved trees of Mexico temperate regions, due to their abundance. However, they have rarely been studied from the karyological point of view. Little information about the genus Quercus exists, which is based upon American and European species. In these studies, it is reported that 12 is the chromosome basic number and 2 the somatic chromosome number. The objective of this research project was to make a karyological analysis of Q. laurina for taxonomy purposes. Root tips were isolated from young seedlings, preserved in 30g/L paradichlorobenzene and xed on 6:1:1 (v:v:v) Carnoy’s solution. Carmin-acetic was used to stain. The squash technique with acetic acid was used. Chromosome study was determined for mitotic cells during metaphase. Q. laurina karyological study show a diploid species, a basic chromosome number of x = 12, a haploid complement of 37.2 μm, a centromeric index of 40.83 μm, and a intrachromosomal asymmetry index of 0.28 and a karyotype of 18 metacentric and six submetacentric chromosomes. Q. laurina karyomorphology is similar to other Quercus species.

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Published

2019-11-20

How to Cite

Hernández-Vital Carlos Rafael, Álvarez-Moctezuma José Guadalupe, Zavala-Chávez Fernando, and Policarpo Espinosa-Robles. 2019. “ Bonpl”. Revista Mexicana De Ciencias Forestales 34 (105). México, ME:175-86. https://cienciasforestales.inifap.gob.mx/index.php/forestales/article/view/692.

Issue

Vol. 34 No. 105 (2009): Ciencia Forestal en México

Section

Scientific article

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