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angus sire to add muscle?
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<blockquote data-quote="Tod Dague" data-source="post: 338583" data-attributes="member: 61"><p>This is from the Red Angus Association. </p><p></p><p>Before producers are faced with the challenge of keeping females in the breeding herd, they must first meet the goal of increasing the pregnancy rate in their heifers, and breeding them to calve at two years of age. Historically, producers have relied on the relationship between when heifers reach puberty and the scrotal circumference of their sires to ensure that this goal is met. Heifer pregnancy is as heritable as most growth traits such as weaning weight and yearling weight, directly affects profitability, and is the ERT that scrotal circumference indicates. The THR Heifer Exposure Inventories along with historical heifer exposure records provided the RAAA with the information necessary to develop the Heifer Pregnancy EPD which is more accurate than utilizing scrotal circumference when trying to increase fertility in heifers. </p><p></p><p>Research has long shown that increased yearling scrotal circumference is positively correlated with earlier puberty and relative earlier puberty in daughters. However, more recent research with Red Angus cattle indicates that this relationship is not as straight forward as once believed. Recent analysis of Red Angus data has demonstrated that there is a positive relationship between scrotal circumference and yearling weight, and there is generally an unfavorable relationship between yearling weight and genetic merit for heifer pregnancy. Some genes that favorably affect yearling weight tend to increase scrotal circumference. If the scrotal circumference is large due to its association with yearling weight, it may cause small to moderate decreases in genetic potential for pregnancy in heifers bred to calve as two year olds. Genetically larger cattle tend to mature more slowly. However, there are genes that increase scrotal circumference and are not related to growth, but are favorably associated with fertility. It is difficult for breeders to determine which genes are responsible for the reported scrotal circumference, and then separate these two antagonistic genetic effects when trying to utilize scrotal circumference to reduce the age at puberty in their heifers. The Red Angus Heifer Pregnancy EPD alleviates this problem. </p><p></p><p>Here is the link to the full article. <a href="http://old.redangus.org/newredsite/themagazine/julyaugust01/femalefertility.html" target="_blank">http://old.redangus.org/newredsite/them ... ility.html</a></p><p></p><p>I had posted this last year about this time. Sorry but I was no longer able to find the article on the net.</p></blockquote><p></p>
[QUOTE="Tod Dague, post: 338583, member: 61"] This is from the Red Angus Association. Before producers are faced with the challenge of keeping females in the breeding herd, they must first meet the goal of increasing the pregnancy rate in their heifers, and breeding them to calve at two years of age. Historically, producers have relied on the relationship between when heifers reach puberty and the scrotal circumference of their sires to ensure that this goal is met. Heifer pregnancy is as heritable as most growth traits such as weaning weight and yearling weight, directly affects profitability, and is the ERT that scrotal circumference indicates. The THR Heifer Exposure Inventories along with historical heifer exposure records provided the RAAA with the information necessary to develop the Heifer Pregnancy EPD which is more accurate than utilizing scrotal circumference when trying to increase fertility in heifers. Research has long shown that increased yearling scrotal circumference is positively correlated with earlier puberty and relative earlier puberty in daughters. However, more recent research with Red Angus cattle indicates that this relationship is not as straight forward as once believed. Recent analysis of Red Angus data has demonstrated that there is a positive relationship between scrotal circumference and yearling weight, and there is generally an unfavorable relationship between yearling weight and genetic merit for heifer pregnancy. Some genes that favorably affect yearling weight tend to increase scrotal circumference. If the scrotal circumference is large due to its association with yearling weight, it may cause small to moderate decreases in genetic potential for pregnancy in heifers bred to calve as two year olds. Genetically larger cattle tend to mature more slowly. However, there are genes that increase scrotal circumference and are not related to growth, but are favorably associated with fertility. It is difficult for breeders to determine which genes are responsible for the reported scrotal circumference, and then separate these two antagonistic genetic effects when trying to utilize scrotal circumference to reduce the age at puberty in their heifers. The Red Angus Heifer Pregnancy EPD alleviates this problem. Here is the link to the full article. [url=http://old.redangus.org/newredsite/themagazine/julyaugust01/femalefertility.html]http://old.redangus.org/newredsite/them ... ility.html[/url] I had posted this last year about this time. Sorry but I was no longer able to find the article on the net. [/QUOTE]
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