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<blockquote data-quote="Lucky_P" data-source="post: 1266381" data-attributes="member: 12607"><p>tnt, </p><p>I suspect there's some Charolais or Simmental back in the woodpile somewhere behind those white 'Angus', and that someone has been practicing selection for the color inhibitor or color dilution genes for enough time that these cattle are essentially homozygous black - but also homozygous for the color inhibitor/diluter genes.</p><p> </p><p>Have two white cows in the herd here that go back to either an old yellow lineback Charolais-cross cow I bought in 1986, or to one of the yellow & white Simmental sires I used back in the late 1980s; I know what's behind both of them for the past 30 years. Both are essentially a 'black' cow (though both are red gene carriers), and will drop either black, red, or white calves, depending upon what they're bred to (Angus, Shorthorn sires). </p><p>One has a white Angus-sired calf this spring, which looks like those in the UF link, that is at least 31/32 Angus breeding; last year's calf was a red Shorthorn-sired heifer. </p><p>The other has produced one white and two black Angus-sired calves, and two black Shorthorn sired calves. Bred to a homo black bull her calves could potentially be either black or white/smoky - but, bred to a red or hetero-black bull, she could potentially produce a red, yellow, black, or gray/white calf - it's a genetic roll of the dice, but so far she's only produced black offspring.</p></blockquote><p></p>
[QUOTE="Lucky_P, post: 1266381, member: 12607"] tnt, I suspect there's some Charolais or Simmental back in the woodpile somewhere behind those white 'Angus', and that someone has been practicing selection for the color inhibitor or color dilution genes for enough time that these cattle are essentially homozygous black - but also homozygous for the color inhibitor/diluter genes. Have two white cows in the herd here that go back to either an old yellow lineback Charolais-cross cow I bought in 1986, or to one of the yellow & white Simmental sires I used back in the late 1980s; I know what's behind both of them for the past 30 years. Both are essentially a 'black' cow (though both are red gene carriers), and will drop either black, red, or white calves, depending upon what they're bred to (Angus, Shorthorn sires). One has a white Angus-sired calf this spring, which looks like those in the UF link, that is at least 31/32 Angus breeding; last year's calf was a red Shorthorn-sired heifer. The other has produced one white and two black Angus-sired calves, and two black Shorthorn sired calves. Bred to a homo black bull her calves could potentially be either black or white/smoky - but, bred to a red or hetero-black bull, she could potentially produce a red, yellow, black, or gray/white calf - it's a genetic roll of the dice, but so far she's only produced black offspring. [/QUOTE]
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