A scur is an incompletely developed horn growth. In cattle, scurs are not attached to the skull, whereas horns are attached and have blood vessels and nerves.[1] Scurs may also occur in sheep[2] and goats.
The gene for scurs is inherited separately [3] from the polled gene in cattle.[4] Not all polled animals lack the scur gene. Since horned is recessive to polled,[5] no horned cattle carry the polled allele, but they may also carry scurs.
In cattle, genetic expression of the scur gene is different from that of the dominant polled gene, in that the scur gene's expression depends on the sex of the animal. The scur gene is dominant in males and recessive in females.[6]
^Dove W. (1935) The physiology of horn growth: a study of the morphogenesis, the interaction of tissues, and the evolutionary processes of a Mendelian recessive character by means of transplantation of tissues. Journal of Experimental Zoology 69, 347– 405.
^Johnston SE, Beraldi D, McRae AF, Pemberton JM, Slate J. 2009. Horn type and horn length genes map to the same chromosomal region in Soay sheep. Heredity (Edinb). 104(2):196-205. doi: 10.1038/hdy.2009.109
^Asai, M, T. G. Berryere, Schmutz, S. M. 2004. The scurs locus in cattle maps to bovine chromosome 19. Animal Genetics 35:34-39
^Georges, M., R. Drinkwater, T. King, A. Mishra, S.S. Moore, D. Nielsen, L.S. Sargeant, A. Sorensen, M.R. Steele, X. Zhao, J.E. Womack and J. Hetzel. 1993. Microsatellite mapping of a gene affecting horn development in Bos taurus. Nat. Genet. 3: 206-210.
^Long, C. R. and K. E. Gregory. 1978. Inheritance of the horned, scurred, and polled condition in cattle. J. Heredity. 69:395-400.
^Allison, B.C. "Inheritance of Polledness, Horns and Scurs in Beef Cattle". North Carolina State University. Retrieved 30 December 2013.
External linksedit
The Genetics of Polled/Horned/Scurred in Cattle [1]
January 01, 1970
scur, scur, incompletely, developed, horn, growth, cattle, scurs, attached, skull, whereas, horns, attached, have, blood, vessels, nerves, also, occur, sheep, goats, contents, genetic, inheritance, also, references, external, linksgenetic, inheritance, editthe. A scur is an incompletely developed horn growth In cattle scurs are not attached to the skull whereas horns are attached and have blood vessels and nerves 1 Scurs may also occur in sheep 2 and goats Contents 1 Genetic Inheritance 2 See also 3 References 4 External linksGenetic Inheritance editThe gene for scurs is inherited separately 3 from the polled gene in cattle 4 Not all polled animals lack the scur gene Since horned is recessive to polled 5 no horned cattle carry the polled allele but they may also carry scurs In cattle genetic expression of the scur gene is different from that of the dominant polled gene in that the scur gene s expression depends on the sex of the animal The scur gene is dominant in males and recessive in females 6 See also editHorn anatomy Polled livestock Livestock dehorningReferences edit Dove W 1935 The physiology of horn growth a study of the morphogenesis the interaction of tissues and the evolutionary processes of a Mendelian recessive character by means of transplantation of tissues Journal of Experimental Zoology 69 347 405 Johnston SE Beraldi D McRae AF Pemberton JM Slate J 2009 Horn type and horn length genes map to the same chromosomal region in Soay sheep Heredity Edinb 104 2 196 205 doi 10 1038 hdy 2009 109 Asai M T G Berryere Schmutz S M 2004 The scurs locus in cattle maps to bovine chromosome 19 Animal Genetics 35 34 39 Georges M R Drinkwater T King A Mishra S S Moore D Nielsen L S Sargeant A Sorensen M R Steele X Zhao J E Womack and J Hetzel 1993 Microsatellite mapping of a gene affecting horn development in Bos taurus Nat Genet 3 206 210 Long C R and K E Gregory 1978 Inheritance of the horned scurred and polled condition in cattle J Heredity 69 395 400 Allison B C Inheritance of Polledness Horns and Scurs in Beef Cattle North Carolina State University Retrieved 30 December 2013 External links editThe Genetics of Polled Horned Scurred in Cattle 1 Retrieved from https en wikipedia org w index php title Scur amp oldid 1216471583, wikipedia, wiki, book, books, library,
