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Artificial Insemination (AI) for Cattle
Ai sire question
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<blockquote data-quote="Son of Butch" data-source="post: 1501667" data-attributes="member: 14585"><p>risk = stillbirth % increases with inbreeding coefficient.</p><p></p><p>I draw the line at 12.5% inbreeding coefficient as being line breeding and greater than 12.5% as inbreeding</p><p>i.e. grandfather to granddaughter = inbred coefficient of (.125) or 12.5%</p><p>i.e. full brother, full sister mating has an inbreeding coefficient of .25 or 25%</p><p>another example of intensive line breeding is mating 1/2 brother to 1/2 sister = 12.5%</p><p></p><p>The best result I've seen was taking a son of the maternal grandfather mated to a granddaughter = 9.375%</p><p>The same cow was mated to a great individual, her paternal 1/2 brother, and that 12.5% mating crashed and burned.</p><p>So 9.375% is my personal preference when making a line breeding suggestion and I prefer line breeding to the maternal</p><p>side of the pedigree rather than the paternal side for replacement females.</p></blockquote><p></p>
[QUOTE="Son of Butch, post: 1501667, member: 14585"] risk = stillbirth % increases with inbreeding coefficient. I draw the line at 12.5% inbreeding coefficient as being line breeding and greater than 12.5% as inbreeding i.e. grandfather to granddaughter = inbred coefficient of (.125) or 12.5% i.e. full brother, full sister mating has an inbreeding coefficient of .25 or 25% another example of intensive line breeding is mating 1/2 brother to 1/2 sister = 12.5% The best result I've seen was taking a son of the maternal grandfather mated to a granddaughter = 9.375% The same cow was mated to a great individual, her paternal 1/2 brother, and that 12.5% mating crashed and burned. So 9.375% is my personal preference when making a line breeding suggestion and I prefer line breeding to the maternal side of the pedigree rather than the paternal side for replacement females. [/QUOTE]
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