Identificación y selección de árboles plus de Primavera (Roseodendron donell-smithii Miranda syn Tabebuia donell-smithii Rose) y Roble (Tabebeuia rosea Bertol) en el Soconusco, Chiapas, México.

Abstract

Objective: Identify and select primavera plus trees (Roseodendron donell-smithii
Miranda syn Tabebuia donell-smithii Rose) and roble (Tabebeuia rosea Bertol) in
Soconusco, Chiapas, Mexico.
Design/methodology/approach: Methods were applied to qualify morphometric
markers such as height, normal diameter, total height and free stem height as main
indicators. With selection intensities to identify future genetic gains, 155 candidate trees
and 18 plus trees from Tabebuia donnell-smithii and 140 candidate trees and 16 plus
trees from T. rosea were identified.
Results: The 34 plus trees showed superior characteristics in quality and volume, so
they were grouped in List A, which is the population that is recommended for immediate
use as Forest Germplasm Producing Units of known origin and provenance. These
trees are part of the base population for the improvement program in the Soconusco

region (Chiapas, Mexico). The 295 candidate trees maintain at least one superior
character (volume or quality) can be considered in the improvement population, being
located in List B.
Limitations on study/implications: This work allows defining the commercial
population for immediate use and the base population for improvement. Candidate
individuals with potential to be incorporated into future controlled crossing programs
were also identified. The procedure allows generating records of the population mass
and accreditation of the plus tree phenotype.
Findings/conclusions: This work allows defining the commercial population for
immediate use and the base population for improvement. Candidate individuals with
potential to be incorporated into future controlled crossing programs were also
identified. The procedure allows generating records of the population mass and
accreditation of the plus tree phenotype.