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 本研究旨在估算模拟数据的遗传参数，该模拟数据涉及体重（BW）、腹宽（AW）、腹长（AL）及产卵量。本研究基于巴西米纳斯吉拉斯州坎普达斯韦尔滕蒂斯地区养蜂场采集的真实数据开展模拟实验。本研究采用单性状和双性状模型进行遗传评估，并通过约束最大似然法估算（协）方差组分。BW、AW、AL及产卵量的遗传力分别为0.54、0.47、0.31和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）之间均存在高度正向遗传相关。BW与AL（0.11）及AW与AL（0.26）之间的遗传相关则分别为中等程度和低程度。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强正向相关。产卵量与AL（0.02）、AW（-0.02）及BW（-0.03）之间的表型相关程度较低且接近0。未来应在带有生物学数据的群体中开展涉及上述性状的新研究，以评估选择对经济重要性状的影响。