Didier E, Fargeix N
J Embryol Exp Morphol. 1976 Jun;35(3):637-48.
A quantitative analysis made on quail embryos coming from 13 isolated parent-couples reveals some significative variations of a genetic origin, between some of the offspring studied: the differences observed concern both the quantitative importance of the colonization of gonads by germ cells and the asymmetrical distribution of PGGs (primordial germ cells) between the two genital ridges. The chronological study of the colonization in the quail shows, as in both the duck and the chick, two periods of rapid and regular increase of the number of gonadic PGC, at stages from 13 to 18 and from 24 to 30 of Hamburger & Hamilton. The distribution of germ cells between the two genital ridges is, at the beginning of the colonization, not very asymmetrical. Between stages 18 and 24 the asymmetry increases and remains stable so that the mean value of D% (percentage of the number of PGC contained in the right gonad) from that moment on is equal to 29-34%. This value is specific for the quail embryo.
对来自13对隔离亲代鹌鹑的胚胎进行的定量分析揭示了在一些研究的子代之间存在一些具有遗传起源的显著差异:观察到的差异既涉及生殖细胞对性腺的定殖数量的重要性,也涉及原始生殖细胞(PGG)在两个生殖嵴之间的不对称分布。鹌鹑定殖过程的时间研究表明,与鸭和鸡一样,在Hamburger & Hamilton的第13至18阶段以及第24至30阶段,性腺原始生殖细胞数量有两个快速且规律增加的时期。在定殖开始时,生殖细胞在两个生殖嵴之间的分布不是很不对称。在第18至24阶段之间,不对称性增加并保持稳定,使得从那时起D%(右性腺中所含原始生殖细胞数量的百分比)的平均值等于29 - 34%。这个值是鹌鹑胚胎特有的。