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Using bulls of the past
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<blockquote data-quote="Tom Underwood" data-source="post: 472070" data-attributes="member: 5097"><p>This year, approximately 25% of my breeding was to bulls with semen stored in ampules, such as HCJ Beau Rollo 60 and W Beau Rollo 10. One of my herd sires is out of Adv Modest Lamp 57, who was born in 1952. I also bred to 15G (straws) and a couple of exceptional performance but relatively unused L1 bulls from the 80's. For modern genetics, I bred to M326, Kudzu, and Wideload.</p><p></p><p>My best cow in terms of performance is a 15G daughter out of a Headline S133 daughter (DTF Kaleigh 15G 917). She has produced my best performing bull, weaned a steer at 700 lbs without creep, and produced 1 DOD thus far. She competes against the best modern genetics I can find. After breeding her to a son twice, I recently flushed her to M326 and W Beau Rollo 10.</p><p></p><p>Growth is definitely sacrificed when I use bulls prior to 1970. Hardiness, volume and carcass characteristics seem to improve. The first few I've ultrasounded indicate that they do not share the same strong correlation between BF and IMF that modern genetics do. </p><p></p><p>FWIW, pigment is definitely lost using pre-1970 bulls, but I have noticed that the calves from some sires tend to recover from pinkeye quickly and do not have spots. Modern calves in the same field have to be treated or they develop major problems.</p></blockquote><p></p>
[QUOTE="Tom Underwood, post: 472070, member: 5097"] This year, approximately 25% of my breeding was to bulls with semen stored in ampules, such as HCJ Beau Rollo 60 and W Beau Rollo 10. One of my herd sires is out of Adv Modest Lamp 57, who was born in 1952. I also bred to 15G (straws) and a couple of exceptional performance but relatively unused L1 bulls from the 80's. For modern genetics, I bred to M326, Kudzu, and Wideload. My best cow in terms of performance is a 15G daughter out of a Headline S133 daughter (DTF Kaleigh 15G 917). She has produced my best performing bull, weaned a steer at 700 lbs without creep, and produced 1 DOD thus far. She competes against the best modern genetics I can find. After breeding her to a son twice, I recently flushed her to M326 and W Beau Rollo 10. Growth is definitely sacrificed when I use bulls prior to 1970. Hardiness, volume and carcass characteristics seem to improve. The first few I've ultrasounded indicate that they do not share the same strong correlation between BF and IMF that modern genetics do. FWIW, pigment is definitely lost using pre-1970 bulls, but I have noticed that the calves from some sires tend to recover from pinkeye quickly and do not have spots. Modern calves in the same field have to be treated or they develop major problems. [/QUOTE]
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