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To investigate goose feather follicle development and difference among the dorsal, ventral, and thoracal tracts during embryonic stage, the present study was conducted on 180 embryos at different ages obtained from the Jilin White goose, a Chinese indigenous breed. The study indicated that the epidermis and dermis of goose embryo formed between embryonic day 10 (E10) and 12 (E12). The thickness of the epidermis remained unchanged until hatching; while the thickness of the dermis increased throughout embryonic development. The primary feather follicles formed around E13-E14 and there were no new primary feather follicles forming after E18. The secondary feather follicles formed coincidently at E18. The density of primary and secondary feather follicles on the ventral and thoracal tracts were significantly higher than those on the dorsal tract (p 0.05). It is concluded that the Jilin White goose is of a single-follicle group structure, differing from mammals which are of multiple-follicle group structure.

Characterization of Embryonic Feather Follicle Development in the Chinese Indigenous Jilin White Goose