- 7 -
daughter resulted in an “outcross”.9 Mr. Rinehart was
outcrossing these two bloodlines in an attempt to get “hybrid
vigor”.10
After researching the market, in 1992 Rinehart purchased a
stallion named Doc City. Doc City was the second youngest then
existing son of Doc Bar.
After inserting Doc City into his breeding program, Mr.
Rinehart discovered that his mares were not getting pregnant
because Doc City had a breeding problem (he was not ejaculating
semen into the mares). This was unexpected because over the
previous 13 years Doc City sired approximately 85 horses.
Mr. Rinehart sought advice from veterinary experts at the
University of Pennsylvania and the University of Colorado--
universities which had done extensive breeding research. Mr.
Rinehart decided to have Doc City evaluated by the University of
Pennsylvania. The University of Pennsylvania determined that Doc
City could only be used for very limited breeding. In fact, Doc
City produced only two foals for Mr. Rinehart before the horse
9 In the cutting horse industry, there are prominent traits
associated with certain bloodlines/lineages. In attempting to
improve the breed, horses descended from different bloodlines
with complementary traits are mated. This is termed
“outcrossing”. The purpose of outcrossing is to mate one horse
with desired traits to another horse with different desired
traits so the resultant offspring will have traits superior to
its parents (the sire and dam).
10 Hybrid vigor results in the best of both bloodlines in
the foal.
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Next
Last modified: May 25, 2011