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Sheep Exam 1
ANS 262
Question | Answer |
---|---|
Top Sheep States | 1. Texas 2. California 3. Wyoming 4.Colorado 5.South Dakota |
Top Sheep Operations | 1. Texas 2. Arizona 3. California 4. Pennsylvania 5. Iowa |
World Sheep Production | 1. China 2. Australia 3. India 4. New Zealand 5. United Kingdom |
Average Market Lamb Weight | 136 pounds |
Average Fleece Weight | 7.5 pounds |
Milk Price | .54/lb 4x cow |
ASI Recognized breeds | 47 |
Suffolk | Most registrations large high cutability most NSIP flocks Terminal |
Hampshire | terminal high cutablity large |
Columbia | dual purpose US developed largest white faced range conditions heavy-medium fleece |
Dorset | polled at N. Carolina State lamb out of season moderate |
Corriedale | australia and new zealand 2nd numerous breed heavy fleece |
Romney | black hoof, foot rot resistance heavy, long stapled, course wool |
Merino | finest wool most numerous australia predominant |
Rambouillet | largest fine wool western range finest U.S breed |
Polypay | rambouillet, dorset, finn, targhee |
Targhee | U.S sheep experiment station Dubois ID |
Dorper | Hair Sheep south africa meat long breeding season |
kathadin | hair sheep maine hardy parasite resistance |
Finn | prolific |
Romanov | prolific dark wool, lost in first cross |
purebred mating systems | inbreeding outbreeding |
Inbreeding Coefficient | F sibs .25 parents lamb .25 half sibs .125 nephew aunt .0625 reproductive rate |
prepotent | transmitting traits in a predictable manner homozygous |
Crossbred | hybrid vigor higher fertility grow faster |
% heterosis | [(XB-PB)/PB]*100 highest in low heritability traits |
Heritability | 0-1 environment-100% |
Breeding Value | (individual-contemperary)*heritability derived from breed average |
Progeny Difference | 1/2 breeding value |
BLUP | Best Linear Unbias Prediction use in EPD's |
weaning weight | 30-90 days |
post weaning weight | 30 days after weaning weight |
maternal milk | derived from weaning weight milk+gain |
carcass traits | 12th rib fat thickness (CF) 12th rib LEA (EMD) |
NSIP | national sheep improvement program |
Scrapies | Codon 171 RR (arginine) RQ (arginine, glutamine) QQ (glutamine) |
Callipyge | hypertrophy (increased muscle fiber diameter) Imprinting Paternal Polar Overdominance normal ram CC to normal ewe NN to produce 100% |
generation interval | breed ewe lambs and young studs to decrease |
wool traits | staple length greecy fleec weight fiber diameter |
Indexes | Western Range Ewe Productivity Carcass Plus |