Ph.D. Student, Sao Paulo State University
Available information on Africanized honeybee breeding, especially regarding the male component of the species, is almost non-existent. The aim of this study was to estimate genetic correlations for weight and morphometric traits of drones at emergence and maturity, so that in future breeding programs these traits can act as selection criteria through their genetic value. Phenotypic and genetic parameters were estimated for weight and morphometric traits such as weight (W), total length (TL), abdomen length (AL), abdomen width (AW), wing length (WL) and wing width (WW) at drones’ emergence (E) and maturity (M). Single-trait and two-trait models were used and parameters such as genetic variance, heritability and genetic correlations were calculated using a Bayesian approach.
Abstract: Population-specific parameters are important for designing breeding programmes, providing insights into the possible genetic gain achieved in the conditions under which the traits were measured. In the present study, 72 beekeepers and three breeding centres provided performance testing results from 1,088 colonies. (Co)variances were estimated by restricted maximal likelihood (REML). Computations were carried out with both REMLF90 and AIREMLF90 software. In this first approach for Apis mellifera syriaca, a typical representative of the endangered subspecies of the Middle East, we found that the heritabilities for honey production (H) and gentleness (G) were hH2 = 0.27 ± 0.32 and hG2 = 0.08 ± 0.28, respectively. A negative genetic correlation between the two traits was estimated (rHG = −0.50 ± 0.93).
Pub.: 07 Mar '12, Pinned: 30 Jun '17
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