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Re: [RC] PocoBueno thing - heidiI think the problem arises when Poco Bueno is linebred in a pedigree (i.e. appears more than once). It seems that crossing on his bloodline causes the genetic problem. This may seem semantic, but it pays to keep the terminology straight, else the issue becomes confusing. Linebreeding or inbreeding does not "cause" genetic problems. It merely gives opportunity for mutated genes to be doubled up. It is a gene mutation that causes genetic "problems." If the mutation was quite recent, it may be able to be traced back to a specific ancestor, in which case it appears that doubling that ancestor "causes" the problem. In fact, if you breed descendants of that ancestor that don't happen to carry copies of the mutated gene, then no matter HOW many times you cross them, you can't "cause" the problem. To make this more clear, look at a mutation such as SCID in Arabians (which has the same inheritance pattern--a simple recessive). Because that one occurred most likely well over a century ago, one can cross seemingly unrelated individuals that happen to be carriers and crop up with an affected foal. No linebreeding at all. So it is really incorrect to suggest that it is the linebreeding that "causes" the problem. Heidi ============================================================ I don't think you have to join a gym or buy frilly outfits to get some fitness. A decent set of shoes and a 15 minute dismount here and there will help. ~ Jon K. Linderman, Ph.D., FACSM, Assistant Professor of Health and Sport Science, University of Dayton ridecamp.net information: http://www.endurance.net/ridecamp/ ============================================================
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