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J Embryol Exp Morphol 6, 530-545 (1958)
Published by The Company of Biologists 1958
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The Melanoblast Reservoir Available to a Feather Papilla

A. G. Cock1 and J. Cohen2

Poultry Genetics Unit, School of Agriculture, University of Cambridge, and the Department of Zoology, University of Hull

1 Authors' present addresses: Agricultural Research Council Poultry Research Centre, West Mains Road, Edinburgh 9, U.K.

2 Authors' present addresses: Medical Research Council Unit for Research on the Experimental Pathology of the Skin, The Medical School, University of Birmingham, Birmingham 15, U.K.

Received for publication 24 March 1958.

SUMMARY

It has been established beyond doubt that the melanin pigments of feathers are produced by cells which, like other vertebrate melanin-producing cells, are ultimately derived from the embryonic neural crest (Rawles, 1948). The migratory process whereby the skin receives prospective pigment cells from the neural crest occurs in early embryonic life; in the chick embryo it is completed by 90–100 hours of incubation (Watterson, 1942). The later stages of the migration, whereby cells of this lineage come to lie in intimate contact with the epidermal cells of a developing feather, are more controversial. The definitive pigment cells (melanocytes) are lost into feathers, so that there must exist some reservoir of melanoblasts from which the melanocytes of future feathers are derived.3 It is with the nature and location of this reservoir that we are here concerned. Before describing our experiments it will be advisable to discuss some of the previous literature.


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© The Company of Biologists Ltd 1958