Morphology of needles and cones in natural populations of "Pinus Arizonica Engelm"

Authors

  • Rodrigo Rodríguez Laguna Centro de Investigaciones Forestales, ICAP
  • Miguel A. Capo Arteaga Departamento Forestal. UAAAN.

DOI:

https://doi.org/10.35197/rx.01.01.2005.09.RR

Keywords:

Pinus arizonica Engelm, morphologic variation, geographic variation, morphology

Abstract

In order to estimate and show the phenotypic variation of some natural populations of Pinus arizonica Engelm, 11 morphological variables were evaluated in needles and cones of nine natural populations, considering only the population as the source of variation. Of the variables analyzed in the present study, such as needle length, number of serrations per centimeter, number of needles per fascicle and needle width, they presented the greatest variation between populations, while the variable with the least variation between populations was presented in cone length and umbo length. According to the analysis of variance, the six evaluated needle characters were highly significant, while of the five evaluated cone characters, three of them were significant and two were not significant. Highly significant correlations were found in most of the variables analysed, including: 1) number of serrations per cm with the number of stomata per cm on the three sides of the needle, 2) the number of needles per fascicle with altitude, and 3) the length of the needle with its width. The cluster analysis formed four groups, two thirds of the maximum Euclidean distance apart, which are morphologically different from each other, with a tendency to group populations by climatic and physiographic factors.

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pp.

Published

2005-05-30

How to Cite

Rodríguez Laguna, R., & Capo Arteaga , M. A. (2005). Morphology of needles and cones in natural populations of "Pinus Arizonica Engelm". Revista Ra Ximhai , 1(1), 131–152. https://doi.org/10.35197/rx.01.01.2005.09.RR

Issue

Section

Artículos científicos