Sheep1

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Author:
kenleyc
ID:
137166
Filename:
Sheep1
Updated:
2012-02-23 08:54:44
Tags:
breeds genetic concepts wool
Folders:

Description:
Sheep test 1
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  1. paid for by import tariffs to supplement pay when wool prices were low
    Wool Incentive Program
  2. Average wool per year for fine wool sheep (lbs)
    10-15
  3. Fine wool advantages
    • adaptable
    • good foragers
    • gregarious
    • out of season breeding
    • longevity
  4. Disadvantages Fine wool
    • slower growth rate
    • lighter muscled
    • wool blindness/wrinkles
    • lower lambing % (environmental)
    • horn grows too close to head
  5. Finest wool
    Merino
  6. Most popular fine wool in TX/Southwest
    Bigger than Merino
    Rambouillet
  7. Developed in New Mexico
    Large, longer staple length
    Rambouillet X Merino
    Debouillet
  8. Long wools average __ to __ in annually
    8 - 12
  9. Long wool advantages
    • large size
    • crossing capability
    • good milkers
  10. Long wool disadvantages
    • Wool too coarse for apparel
    • Light muscled w/fatter carcasses
  11. Largest long wool breed
    Lincoln
  12. small long wool breed, best for hand spinners due to natural colors
    Cotswold
  13. Leicester is a ____ wool
    long
  14. Genetic resistance to foot rot
    open faced
    good for high rainfall
    shorter, finer wool
    Romney
  15. Advantages of med wool breeds
    • larger
    • heavier fleeces
    • good under decent range conditions
  16. Disadvantages of med. wool
    • too big for some environments
    • not as much carcass value
  17. Med wool breen
    Lincoln Rams X Rambouillet Ewes
    Columbia
  18. Lincoln Rams X Merino Ewes
    Popular in New Zealand
    black feet and nose
    Corriedale
  19. Rambouillet Rams X Columbia Ewes
    adopted Idaho Research Project
    Targhee
  20. Rambouillet Rams X Lincoln Ewes
    Slick head and legs
    adaptable and useful
    Panama
  21. Most valuable meat breen
    Suffolk/Hampshire
  22. Breed that has high instance of scrapie and spider
    Suffolk
  23. 3rd most important meat breed
    Dorset
  24. white meat breed
    breeds year around and milks well
    Dorset
  25. #4 meat breed
    Southdown
  26. Advantages of Southdown
    • Good reproduction
    • grows well, good carcass
  27. Disadvantages of Southdown
    too small for US industry
  28. Columbia X Cheviot
    Made in US
    dual purpose
    Montadale
  29. Lean, high cutability
    too small for US market
    Texel
  30. Highly prolific breeds that are used in crossbred operations (4)
    • Finnsheep
    • Polypay
    • Booroola Merino
    • Romanov
  31. Homozygous dominant gene going back to an inbred ewe
    Booroola Merino
  32. Prolific, tough, good udders, great for crossbred operations
    Romanov
  33. Wild hair sheep used for hunting
    Barbados Blackbelly
  34. True shedding hair sheep
    prolific, good mothers, will breed back while lactating
    Saint Croix
  35. White Barbados
    Texas Dahl
  36. Heritablility is lowest for this
    Reproduction
  37. Medium heritabiliy
    growth rate
  38. Med to high heritability
    Carcass
  39. High heritability
    wool
  40. Selection differential
    Avg for poplation subtracted from selected individuals
  41. Generation interval
    avg age of parents when offspring is born
  42. Most important traits for ewes
    • Adaptability
    • Reproduction
    • Longevity
  43. Important traits for Rams
    • Growth
    • Fertility
    • Genetic defects
    • Carcass
  44. value applied to each trait based on importance
    index
  45. Top 5 wool producing nations
    • Australia
    • China
    • New Zealand
    • Argentina
    • Iran
  46. Average fleece size
    7.4 lbs
  47. shearing done in
    April, May, June
  48. Washing and refining process
    Scouring
  49. Removing remaining debris
    Carding
  50. Arrange fibers in a parallel and remove noilage
    Combing
  51. Wool - not previously processed, mens suits
    worsted system
  52. processed - blankets, women's suits
    Woolen system
  53. Four most important characteristics of wool
    • Weight
    • Yield
    • Staple length
    • Avg. fiber diameter

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