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Cattle Boards
Breeding / Calving Issues
Stacking low birth weight genetics
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<blockquote data-quote="Bright Raven" data-source="post: 1545293" data-attributes="member: 27490"><p>It is only a thought at this point.</p><p></p><p>The essence of the concept in the OP is that breeding of low birthweight bulls to low birth weight heifers/cows over several generations will result in shorter and shorter gestation periods - thus lowering the birth weight. That is why Gizmom ask me the following: <u>Have you bred low birth weight bulls to low birth weight heifers for several generations</u>? Your "side note" at the bottom of the last paragraph does not speak to the issue of "length of gestation". </p><p></p><p>Son of Butch has introduced another factor - direct inheritance. Quote - "Conclusion: gestation length is a heritable variation".</p><p></p><p>If you have some quotes from Bonsma on low birth weight being influenced by length of gestation, could you please post them? If you have actual research that addresses that concept, IMO, that would be even better.</p></blockquote><p></p>
[QUOTE="Bright Raven, post: 1545293, member: 27490"] It is only a thought at this point. The essence of the concept in the OP is that breeding of low birthweight bulls to low birth weight heifers/cows over several generations will result in shorter and shorter gestation periods - thus lowering the birth weight. That is why Gizmom ask me the following: [u]Have you bred low birth weight bulls to low birth weight heifers for several generations[/u]? Your "side note" at the bottom of the last paragraph does not speak to the issue of "length of gestation". Son of Butch has introduced another factor - direct inheritance. Quote - "Conclusion: gestation length is a heritable variation". If you have some quotes from Bonsma on low birth weight being influenced by length of gestation, could you please post them? If you have actual research that addresses that concept, IMO, that would be even better. [/QUOTE]
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