ans3384colhornscows - INHERITANCE OF COLORS AND SPOTTING IN...

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Unformatted text preview: INHERITANCE OF COLORS AND SPOTTING IN CATTLE • THE E LOCUS - The Black-Red Locus – ED • Solid black at birth – E+ • Reddish brown with varying amounts of black on the head, neck, legs, tail and other areas (born red) –e • Red JCL Baxter 99K is Homozygous Black and Homozygous Polled INHERITANCE OF COLORS AND HORNS IN CATTLE • THE E LOCUS - The Black-Red Locus – ED • Solid black at birth – E+ • Reddish brown with varying amounts of black on the head, neck, legs, tail and other areas (born red) –e • Red E Locus Cattle Coat Color Study Guide • • • • • • • • • ED/E+ -- Black ED/e -- Black E+/e -- Wild Type e/e – Red ED/E+ Br/ – -- Black ED/e Br/ – -- Black E+/e Br/ – -- Brindle E+/e br+/br+ -- Wild Type e/e Br/ – -- Red Registered Charolais-heterozygous for the dilution factor Dark red (non-dilute) registered Charolais calf Black, registered Charolais bull Dilution Cattle Coat Color Study Guide • • • • • • • ED/ – dc+/dc+ -- Black, no change ED/ – Dc/dc+ -- Light Gray/Smoky ED/ – Dc/Dc -- Almost White e/e dc+/dc+ -- Red, no change e/e Dc/dc+ -- Yellow/Cream e/e Dc/Dc -- White Same kind of effect upon “Wild Type” The S Locus • SH - the white face and lower legs, etc. of the Hereford breed • SP – the white stripe along the back of the Pinzgauer breed • S+ - no spotting (solid) • s recessive (irregular) spotting as inn Holsteins Black Herefords Hereford X Holstein Cow – genotype = ED/e SH/s Indicates complete dominance of both ED and SH Line 1 Hereford – segregated from normally spotted Hereford parents S Locus Spotting Phenotypes • • • • • SH/SH -- Full Hereford Pattern SH/S+ -- Partial Hereford Pattern (white face) SH/SP -- White Face with Stripe down back SH/ s -- Full Hereford Pattern SP/S+ -- Partial Pinzgauer Pattern (white on rump or tail only) • SP/ s -- Full Pinzgauer Pattern • S+/s – Solid Coloration = no spotting • s/s – Recessive spotting (like that of a Holstein) The Roan Gene • R/R – pigment is removed from all hairs resulting in a white animal regardless of “background” coloration • R/R+ -- pigment is removed from some hairs throughout the body resulting in a mixture of pigmented and colored hairs, the roan pattern • R+/R+ -- no pigment is removed, the color remains that of the background color ...
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This note was uploaded on 07/16/2011 for the course ANS 3384 taught by Professor Olson during the Spring '09 term at University of Florida.

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