Marks H L
Poult Sci. 1975 Jul;54(4):1257-62. doi: 10.3382/ps.0541257.
Relationships between egg, embryo, hatch, two-week and four-week body weights of three quail lines differing in growth rate were investigated. Two of the quail lines had previously undergone 29 generations of selection for increased four-week body weight, and the third line was a nonselected control. Selected lines produced heavier eggs, larger 10 to 11 day embryos, and larger chicks. Percent embryo weights were similar for all three lines indicating that correction for egg size eliminated differences in embryo weight. Percentages of hatch weights of selected lines were significantly (P less than .01) larger than comparable percentages in the control line. Correlations between egg and embryo weights were of low magnitude but correlations between egg and hatch weights were large (.7 to .8). Mean regression coefficients for four-week body weight on egg weight were 5.11 and 2.67 g. in trials 1 and 2, respectively. Relationships between egg, embryo, hatch, and body weights of Japanese quail appeared to be of the same general magnitude as those observed in the domestic fowl.
对生长速率不同的三个鹌鹑品系的蛋重、胚胎重量、孵化重、两周龄体重和四周龄体重之间的关系进行了研究。其中两个鹌鹑品系先前经过了29代的选育，以提高四周龄体重，第三个品系为未选育的对照品系。选育品系产出的蛋更重，10至11日龄的胚胎更大，雏鸡也更大。所有三个品系的胚胎重量百分比相似，这表明对蛋大小进行校正后消除了胚胎重量的差异。选育品系的孵化体重百分比显著（P小于0.01）高于对照品系的相应百分比。蛋重与胚胎重量之间的相关性较低，但蛋重与孵化体重之间的相关性较大（0.7至0.8）。在试验1和试验2中，四周龄体重对蛋重的平均回归系数分别为5.11和2.67克。日本鹌鹑的蛋重、胚胎重量、孵化体重和体重之间的关系似乎与家鸡中观察到的关系大致相同。
