The description of the growth of the Japanese quails is necessary to characterize the genetic potential of these birds raised in different countries. Thus, the aim of this study was to describe the genetic potential of Japanese quails by conducting a meta-analysis considering studies conducted in different countries. Only data about the subspecies Coturnix coturnix japonica were considered; studies regarding Coturnix coturnix coturnix were not examined. The criteria investigated were BW (W), age (t), year of publication and location of the study. Each set of genetic material within a publication was coded as one study. The Gompertz function was used to interpret the growth of laying quails; thus, each study was represented by Gompertz parameters. The W and t data were applied to estimate the values of Gompertz growth parameters, including BW at maturity (Wm), BW at birth (Wi), maturity rate (B) and inflection point (IP). The age at which the maximum growth rate was achieved (t*) was calculated considering the parameters Wm, Wi and B. To estimate these parameters, random regression was used to randomize the parameter Wm. The parameters estimated for each assay were used in exploratory, grouping, and principal component analyses. The values of Wi ranged from 4.1 to 11.6 g. The values of B ranged from 0.0393 to 0.1039/day, and consequently, the values of t* and IP ranged from 14 to 31 days and 9.21 to 31.03 g, respectively. These results show that there is considerable variability in the growth potential of Japanese quails. To better understand this variation, two groups were examined: Brazil and other countries, according to the grouping of Wi, Wm, B and t*; parameter B was the variable that presented the highest specificity, indicating that both groups modified the maturity rate. For the principal component analysis, the year of publication showed a relationship with the growth parameters but only for studies performed in Brazil. For studies carried out in other countries, the changes in growth parameters were not related to the year of publication. In Brazilian studies, there was a decrease in the maturity rate, but the weight at maturity was higher. Therefore, it appears that different strategies of genetic selection were adopted in Brazil compared to other countries.

对日本鹌鹑生长的描述对于表征这些在不同国家饲养的鸟类的遗传潜力是必要的。因此，本研究的目的是通过考虑在不同国家进行的研究进行荟萃分析来描述日本鹌鹑的遗传潜力。仅考虑了有关亚种Coturnix coturnix japonica的数据。没有审查有关Coturnix coturnix coturnix的研究。研究的标准是体重（W），年龄（t），出版年份和研究位置。出版物中的每套遗传材料都被编码为一项研究。Gompertz函数用于解释鹌鹑的生长。因此，每个研究都由Gompertz参数代表。使用W和t数据估算Gompertz生长参数的值，包括成熟时的体重（W m），出生时的体重（W i），成熟率（B）和拐点（IP）。考虑到参数W m，W i和B来计算达到最大增长率（t *）的年龄。为了估计这些参数，使用随机回归对参数W m进行随机化。为每种测定法估算的参数用于探索性，分组和主成分分析。W i的值在4.1至11.6 g之间。B的值在0.0393至0.1039 /天的范围内，因此，t *和IP的值分别在14至31天和9.21至31.03g的范围内。这些结果表明，日本鹌鹑的生长潜力存在很大差异。为了更好地理解这种差异，根据W i，W m，B和t的分组，检查了两组：巴西和其他国家/地区。*; 参数B是表现出最高特异性的变量，表明两组都修改了成熟率。对于主成分分析，出版年份显示与增长参数相关，但仅适用于在巴西进行的研究。在其他国家进行的研究中，生长参数的变化与出版年份无关。在巴西的研究中，成熟率有所降低，但成熟时的重量更高。因此，与其他国家相比，巴西似乎采取了不同的遗传选择策略。