Genetic parameters for weight, morphometry and oviposition of Africanized honeybee queens using simulated data

ABSTRACT This study aimed to estimate genetic parameters for simulated data of body weight (BW), abdominal width (AW), abdominal length (AL), and oviposition. Simulation was performed based on real data collected at apiaries in the region of Campo das Vertentes, Minas Gerais, Brazil. Genetic evaluations were performed using single- and two-trait models and (co)variance components were estimated by the restricted maximum likelihood method. The heritability for BW, AW, AL and oviposition were 0.54, 0.47, 0.31 and 0.66, respectively. Positive genetic correlations of high magnitude were obtained between BW and AW (0.80), BW and oviposition (0.69), AW and oviposition (0.82), and AL and oviposition (0.96). The genetic correlations between BW and AL (0.11) and between AW and AL (0.26) were considered moderate and low. In contrast, the phenotypic correlations were positive and high between BW and AW (0.97), BW and AL (0.96), and AW and AL (0.98). Phenotypic correlations of low magnitude and close to zero were obtained for oviposition with AL (0.02), AW (-0.02), and BW (-0.03). New studies involving these characteristics should be conducted on populations with biological data in order to evaluate the impact of selection on traits of economic interest.摘要 本研究旨在针对体重（body weight, BW）、腹宽（abdominal width, AW）、腹长（abdominal length, AL）及产卵量的模拟数据估算遗传参数。本研究以巴西米纳斯吉拉斯州坎帕什韦尔滕特斯（Campo das Vertentes）地区养蜂场采集的真实数据为基础开展模拟实验。遗传评估采用单性状与双性状模型开展，（协）方差组分通过约束极大似然法（restricted maximum likelihood）估算。BW、AW、AL与产卵量的遗传力分别为0.54、0.47、0.31与0.66。BW与AW（0.80）、BW与产卵量（0.69）、AW与产卵量（0.82）及AL与产卵量（0.96）之间均呈现高强度正向遗传相关。BW与AL（0.11）以及AW与AL（0.26）之间的遗传相关则为中等至低等水平。与之相反，BW与AW（0.97）、BW与AL（0.96）及AW与AL（0.98）之间的表型相关均为正向高强度相关。产卵量与AL（0.02）、AW（-0.02）及BW（-0.03）之间的表型相关强度较低且接近零值。未来应针对携带真实生物数据的种群开展包含上述性状的新研究，以评估选育对经济相关性状的影响。