Colour-sided

Colour-sided or lineback is a type of fur pattern in domesticated cattle. The term was likely first used by Christian Wriedt in The Journal of Heredity, in 1925.[1][2]

A cow of the Norwegian breed Sidet trønder- og nordlandsfe with the color-sided fur pattern

The colour-sided pattern consists of any solid body colour (such as black, red, or brindle) with irregular white finching along the spine, along the underbelly, and over the tail, head, and legs. The white stripe usually has a ragged or roaned edge. The ears, nose, and feet are generally left dark. An extreme pale form of the colour-sided pattern is where the darker colour is restricted to the ears, nose and feet, leaving most of the animal white.[3]

The pattern occurs in many breeds, but some consistent examples include the English Longhorn cattle, Irish Moiled cattle, Randall Lineback cattle and Riggit Galloway cattle.[3] The colour-sided pattern also appears in yaks and zebus.[2]

Colour-sidedness in cattle is believed to be caused by a translocation of the KIT gene between chromosomes 6 and 29.[4] The gene is believed to be semi-dominant.[3]

References
  1. "article". Genetics. 18. 1933. Retrieved 23 March 2023.
  2. Wriedt, Christian (1925). "Colorsided Cattle: Some Remarks Concerning Their Occurrence and Heredity". The Journal of Heredity. Retrieved 23 March 2023.
  3. Olson, T. A. Genetics of colour variation (PDF). Wallingford: CAB International. Retrieved 23 March 2023.
  4. "DNA Circles Cause Cow Coat Color Changes". Science. 27 May 2011. doi:10.1126/science.332.6033.1030-a. Retrieved 23 March 2023.
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