1. Department of Animal Science; Cornell University; Ithaca NY 14853 USA
2. Quill Lake SK S0A3E0 Canada
3. Department of Biology; University of Tampa; Tampa FL 33606 USA
4. Veterinary Genetics Laboratory; School of Veterinary Medicine; University of California-Davis; Davis CA 95616 USA
5. Department of Population Health and Reproduction; Veterinary Genetics Laboratory; School of Veterinary Medicine; University of California-Davis; Davis CA 95616 USA