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<blockquote data-quote="djinwa" data-source="post: 1085995" data-attributes="member: 8265"><p>Good thinking. I've had this on my mind lately. A chromosome defect that results in 5 to 10% of early abortions. So if 1 of 10 lose first pregnancy, only 1 of 100 will lose two pregnancies, and only 1 of 1000 will lose three in a row. So low impact on overall calving rates, but a general delay in calving. Only noticeable if keeping good records as does Regolith.</p><p></p><p>Here's a slideshow from a vet in Australia as it occurs in British Whites. And they supposedly got the problem from infusing some Scandinavian breeds' blood into the British Whites in England after World War 2. So who knows where and in what breeds you might find it. </p><p></p><p><a href="http://www.britishwhitecattleaustralia.com.au/images/pdfs/translocation_powerpoint_sept_08.pdf" target="_blank">http://www.britishwhitecattleaustralia. ... ept_08.pdf</a></p><p></p><p>This breeder displays the chromosome test on this bull. The "karyotype report" that shows his bull has the full 60 chromosomes as normal. Affected animals will have 59 chromosomes and pass the defect to half their offspring (heterozygous), while others will only have 58 chromosomes and pass the defect to all their offspring.</p><p></p><p><a href="http://www.britishwhite.com/colonel-jr.htm" target="_blank">http://www.britishwhite.com/colonel-jr.htm</a></p></blockquote><p></p>
[QUOTE="djinwa, post: 1085995, member: 8265"] Good thinking. I've had this on my mind lately. A chromosome defect that results in 5 to 10% of early abortions. So if 1 of 10 lose first pregnancy, only 1 of 100 will lose two pregnancies, and only 1 of 1000 will lose three in a row. So low impact on overall calving rates, but a general delay in calving. Only noticeable if keeping good records as does Regolith. Here's a slideshow from a vet in Australia as it occurs in British Whites. And they supposedly got the problem from infusing some Scandinavian breeds' blood into the British Whites in England after World War 2. So who knows where and in what breeds you might find it. [url=http://www.britishwhitecattleaustralia.com.au/images/pdfs/translocation_powerpoint_sept_08.pdf]http://www.britishwhitecattleaustralia. ... ept_08.pdf[/url] This breeder displays the chromosome test on this bull. The "karyotype report" that shows his bull has the full 60 chromosomes as normal. Affected animals will have 59 chromosomes and pass the defect to half their offspring (heterozygous), while others will only have 58 chromosomes and pass the defect to all their offspring. [url=http://www.britishwhite.com/colonel-jr.htm]http://www.britishwhite.com/colonel-jr.htm[/url] [/QUOTE]
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