Mating_Systems

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Oklahoma State University *

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4423

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Chemistry

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Feb 20, 2024

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ANSI 4423 Horse Science Mating Systems Due Tuesday, February 6 th at midnight Submit in Dropbox Using the attached pedigree of this QH stallion, please answer the following questions: 1) What type of work performance is this particular stallion bred to perform? What is the heritability estimate for this type of activity? Why is this h 2 so low? a. Cutting/Cowhorse b. 0.12 c. Genetics can influence working cows, but this needs to be taught, and the environment is the leading factor in developing this trait. 2) List the dams of the female tail line. a. Smart Little Kitty, Doc’s Kitty, Kitty Buck, Miss Peppy D 3) What performance index (progeny earnings, points earned, ROMs, titles) would you use to evaluate this stallion’s ranking? a. Progeny Earnings 4) Calculate the level of inbreeding for High Brow Cat. ( Hint: Doc Bar is a common ancestor ) a. First, draw the map with the pathways on the top and bottom side of the pedigree that leads from High Brow Cat to Doc Bar. b. Determine how many calculations you must make by multiplying the number of pathways on the top by the number of pathways on the bottom. i. 2 * 1 = 2 calculations c. Assume the Inbreeding Coefficient for Doc Bar is 0. i. ¿ = 0.0156 ii. ¿ = 0.0078 iii. 0.0156+0.0078=0.0234= 2.34%
5) Based on your calculation, would you say High Brow Cat is Linebred or Inbred? a. Linebred 6) If you answered Linebred, is this an excellent example of how linebreeding should work? Why or why not? a. Yes, this is an excellent example of line breeding. High Brow Cat is the all-time leading cutting horse sire, has sired eight NCHA futurity champions, and his progeny has earned over $92 million. His most prominent offspring include Metallic Cat, who has earned the title of the current NRCHA All-Time Leading Sire. High Brow Cat 2706274 1988 chestnut stallion SIRE side of pedigree Doc Bar 1956        0076136 chestnut        Lightning Bar 1951        0037566 sorrel        Doc's Hickory 1973        0919616 bay        Dandy Doll 1948        0026556 chestnut        Miss Chickasha 1952        0075443 bay        Chickasha Mike 1944        0019501 chestnut        High Brow Hickory 1983        2075796 dun        Maggie Cowden 1946        0142390 bay        Leo San Hank 1962        0201300 sorrel        Leo San 1949        0020113 sorrel        Grulla San 1970        0739106 grullo        Hank's Sue 1953        0045575 sorrel        Blackburn 36 1963        0246849 dun        Poco Nino 1956        0057795 dun        Lady Black 62 1944        0047759 dun        DAM side of pedigree Doc O'Lena 1967        0493297 bay        Doc Bar 1956        0076136 chestnut        Smart Little Lena 1979        1565822 sorrel        Poco Lena 1949        0030475 bay        Smart Peppy 1966        0439891 sorrel        Peppy San 1959        0114978 sorrel        Smart Little Kitty 1984        2198722 sorrel        Royal Smart 1958        0098659 sorrel        Doc Bar 1956        0076136 chestnut        Lightning Bar 1951        0037566 sorrel        Doc's Kitty 1966        0408142 bay        Dandy Doll 1948        0026556 chestnut        Kitty Buck 1953        0041864 bay        Pretty Buck 1942        0002103 brown        Miss Peppy D 1944        0013775 sorrel       
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