Open AccessGenetic parameters of a progeny trial of Pinus greggii Engelmann ex Parlatore var. australis Donahue & López in the Mixteca Alta of Oaxaca, Mexico
Author(s) -
Gina I. Reyes-Esteves,
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Javier López-Upton,
Mario Valerio Velasco-García,
Marcos JiménezCasas,
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Publication year - 2021
Publication title -
revista chapingo serie ciencias forestales y del ambiente (en línea)/revista chapingo serie ciencias forestales y del ambiente
Language(s) - English
Resource type - Journals
eISSN - 2007-4018
pISSN - 2007-3828
DOI - 10.5154/r.rchscfa.2020.10.067
Subject(s) - heritability , biology , germplasm , genetic variation , sowing , genetic gain , genetic correlation , pinus <genus> , genetic variability , selection (genetic algorithm) , botany , horticulture , genetics , genotype , artificial intelligence , computer science , gene
The Mixteca Alta of Oaxaca has high environmental degradation. Several species have been planted to recover vegetation cover; Pinus greggii Engelmann ex Parlatore var. australis Donahue & López has grown successfully even without selected material.Objective: To determine growth performance and genetic parameters of 90 families at early ages, for use in the selection of superior trees.Materials and methods: In San Miguel Achiutla, Oaxaca, genetic variation in growth, conformation and straightness of 90 selected open-pollinated families of P. greggii var. australiswas evaluated in a progeny trial five years after planting in two different quality sites. Additive genetic variation, heritability (h2) and genetic and phenotypic correlations were calculated.Results and discussion: h2 were superior in the more fertile site. Height, whorls, straightness and volume had greater genetic control (0.09 0.81; diameter vs. volume = 0.99) and low to moderate for the rest. Volume had a higher genetic correlation with other traits and higher genetic variation and heritability, so it could be used as a selection criterion for breeding cycle. Some genetic correlations differed contrastingly between sites in equal pairs of variables.Conclusion: Differences between families and heritability will allow the identification of superior individuals for germplasm sources for regional use.