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Favorite Hereford Bull, past 20 years
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<blockquote data-quote="Herefords.US" data-source="post: 468089" data-attributes="member: 3972"><p>If what I've been told by several Line 1 breeders is correct, they(the scientists working on this) believe the recessive gene originates from HH Advance P242. This bull was born in 1982. </p><p></p><p>P242 appears in the pedigrees of a lot of Hereford cattle, <strong>both polled and horned</strong>. The common ancestor that I see in looking at the confirmed carrier's pedigrees is HH Advance 9012Y, whose maternal grandsire is P242. 9012Y was a great bull and he was widely used - but I'd bet that he is a carrier from what I've been told.</p><p></p><p>However, since the IE gene is a simple recessive, 50% of a carrier's offspring will be free of the genetic disorder. With each successive generation the likelihood of passing on the gene is reduced by another 50%. So there are a lot of "clean" 9012Y (and P242) descendents out there.</p><p></p><p>And there are a LOT of line 1 cattle that don't have P242 in their pedigree at all.</p><p></p><p>Hopefully, they will get the DNA test for the disorder perfected soon. Once that happens, this will be quickly cleaned up and should be eliminated because most of the Line 1 breeders don't want this disorder to taint what is otherwise a tremendous bloodline of Hereford cattle that have added so much to the Hereford breed.</p><p></p><p>George</p></blockquote><p></p>
[QUOTE="Herefords.US, post: 468089, member: 3972"] If what I've been told by several Line 1 breeders is correct, they(the scientists working on this) believe the recessive gene originates from HH Advance P242. This bull was born in 1982. P242 appears in the pedigrees of a lot of Hereford cattle, [b]both polled and horned[/b]. The common ancestor that I see in looking at the confirmed carrier's pedigrees is HH Advance 9012Y, whose maternal grandsire is P242. 9012Y was a great bull and he was widely used - but I'd bet that he is a carrier from what I've been told. However, since the IE gene is a simple recessive, 50% of a carrier's offspring will be free of the genetic disorder. With each successive generation the likelihood of passing on the gene is reduced by another 50%. So there are a lot of "clean" 9012Y (and P242) descendents out there. And there are a LOT of line 1 cattle that don't have P242 in their pedigree at all. Hopefully, they will get the DNA test for the disorder perfected soon. Once that happens, this will be quickly cleaned up and should be eliminated because most of the Line 1 breeders don't want this disorder to taint what is otherwise a tremendous bloodline of Hereford cattle that have added so much to the Hereford breed. George [/QUOTE]
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