ESTIMACIÓN DE PARÁMETROS GENÉTICOS EN DOS CICLOS DE CRECIMIENTO DE G/iricidia sepium (Jacq.) Walp.
Keywords:
Genetic correlations, stability, Gliricidia sepium, heredability, progeny test, growth selectionAbstract
In a Gliricidia sepium provenance and progeny essay established in the state of Veracruz, México, the genetic control (heredability) and phenotypic and genetic relationships between height, biomass production and plant architecture were assessed during two growth cycles in arder to determine the stability of genetic parameters between cycles. Seventy nine half-sib families from 9 seed sources were included in the field experiment. During the first growth cycle, individual-tree heredability for plant height (h = 0.35) was higher than for the other growth characteristics. Family heredability (h21) was higher than individual-tree heredability (h ) in ali characteristics. Both h 1 and h, decreased significantly from the first to the second cycle, associated to variation between plants in sprouting capacity and rate. The genetic and phenotypic correlations between height, growth, diameter and plant biomass were positive in both cycles. In this case, selection of the best families, regardless of seed source, could give a right response to selection.
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