| 词条 | Calico sheep |
| 释义 |
Calico sheep are a type of sheep that have more than 1 colour within its coat.[1] The colouring is due to a piebald mutation, but not a recognized breed. Calico Sheep can be bred by mixing Dorset, Suffolk, Shetland, and Katahdin to give the sheep its unique calico coat. These sheep tend to be very small due to intensive inbreeding and are often mislabeled as a true breed, when they are mere crossbred sheep that have interesting colour patterns. GeneticsThe calico mutation is due to an autosomal recessive gene, first reported by Roberts. [1]HistoryCalico sheep are not related to the black and white sheep that are native to ancient Sudan[2] and to South Africa.[3] The modern mutation was developed by breeding Shetland sheep with Barbados Blackbelly Sheep.{{citation needed|date=August 2012}}
See also
References1. ^1 "A Piebald Mutation in Sheep: And a Suggested Interpretation," Journal of Heredity (1950), Vol. 41, No. 2, pp. 39-40; retrieved 2012-8-19. 2. ^Shaw, Thustan. (1995). [https://books.google.com/books?id=TmUwjhQX-rcC&pg=PA69&lpg=PA69&dq=piebald+sheep&source=bl&ots=qK6yOemXN4&sig=k-zGILXvp1K0qXkAStM0QPkFYo8&hl=en&sa=X&ei=llkxUO_7EaaL0QHDoYCIDQ&ved=0CFoQ6AEwCA#v=onepage&q=piebald%20sheep&f=false The Archaeology of Africa: Food, Metals and Towns, p. 69]. 3. ^British Museum. (1908). [https://books.google.com/books?id=Y2ItAAAAYAAJ&pg=PA21&lpg=PA21&dq= A guide to the domesticated animals (other than horses) exhibited in the central and north halls of the British Museum (Natural History), p. 21]. Further reading
1 : Sheep breeds |
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