SWINE GENETICS
PSS is an abbreviation for? A Powerful sausage sow B Pine scented shouts C Porcine stress syndrome D Porcine stabilization system D PSS is a recessive gene that may result in death when hogs are put in a stressful situation. PSS hogs also have poor carcass quality.
Which matures the quickest? A Gilt B Boar C Barrow D All mature the same A typical breakdown would be a barrow at 250 pounds with 1.0 backfat is equal to a gilt at 265 pounds with 1.0 backfat and a boar at 280 pounds with 1.0 backfat.
How do hogs get fat? A. Back to Front A B. B Bottom to Top C. C Front to Back D. D Inside out
What should a pig s feed efficiency be from 60-260 pounds? A. 1 pound of feed per pound gain B. B 3 to 1 C. C 5 to 1 D. 7 to 1
Which color is most dominate in swine? A. A Red B. B White C C. Black D. D Spotted
A Hampshire crossed with a Duroc will give what color pigs. A. A Black belted and red belted B. B Black, black belted, red belted, and red C. C Black belted, red, blue rumped D. D Black and black belted Black is dominant over red thus all black pigs. The pattern of belted verses solid color seems to be evenly split or lacks genetic dominance.
Heterosis results from... A. A Inbreeding B. B Line breeding C. C Cross breeding D. D Both A and B
Terminal crossing system refers to... A. A Matings where less than 10% are saved as replacements. B. B Matings that result in all animals going to market C. C Matings that are strictly selected for herd replacements D. D Matings specifically designed to check for genetic problems.
When is a - (minus) EPD good? A. A 21 day weight B. B Number born alive C. C Backfat D. D Loin eye area
PSE refers to... A. A Lung condition B. B Chronic ileitis C. C Crooked Nose D. D Poor carcass quality
What is the opposite of crossbreeding? A. A Inbreeding B. B Artificial insemination C. C Heterosis D. D Maternal crossing
What is a rotate-terminal crossing system? A. A Hogs raised year round to maintain cash flow. B. B Breeding system where most of the hogs are bred for market with a select group of the most productive females mated for replacements. C. C System where boars are rotated daily to insure high conception rates. D. D System of changing boars and breeds of boars every 3 years.
Name a maternal breed of swine. A. A Hampshire B. B Duroc C. C Hereford D. D Landrace
Name a terminal breed of swine. A. A Chester White B. B Duroc C. C Landrace D. D Yorkshire
Name two breeds of swine red in color. A. Tamworth, Duroc B. Berkshire, Hereford C. Poland, Yorkshire D. Red Poll, Hampshire
Which three breed are solid white in color? A. A Berkshire, Poland, Hampshire B. B Hereford, Tamworth, Duroc C. C Chester White, Landrace, Yorkshire D. D Berkshire, Chester, Tamworth
Name three breeds that are black and white in color. A. A Berkshire, Poland, Hampshire B. B Hereford, Tamworth, Duroc C. C Chester White, Landrace, Yorkshire D. D Berkshire, Chester, Tamworth
Name two breeds spotted in color. A. Hereford, Berkshire B. Pietrain, Spotted C. Chester, Duroc D. Poland, Tamworth
What breed crossed with a white breed makes blues. A. A Hampshire B. B Poland C. C Duroc D. D Pietrain
Which color is the most dominate in swine? A. A White B. B Black C. C Red D. D Spotted
Which color is the most recessive? A. A White B. B Black C. C Red D. D Spotted
What does SPI stand for? A. Sire Performance Index A B. B Sire Progeny Index C. C Sow Productivity Index D. D Specific Pathogen Index
Which two spots are the most popular in measuring fat on hogs? A. 1st rib, ham B. 1st rib, h-bone C C. 10th rib, last rib D. Shoulder, ham
What is the dressing % of hogs? A. 54% A B. 60% C. 65% D. 74%
What happens to dressing % as hogs get fatter. A. Decreases A B. Increases C. Stays the same D. Doubles
What is the difference between dressing % and yield in hogs? A. About 10% A B. B Dressing % is expressed as a % where yield in a number. C. C One refers to carcass the other to live D. D Nothing their the same
What is a cryptorchid? A. A genetic blood disease A B. B A genetic defect where one or both of the testicles do not descend into the scrotum C. C Hair shaped like a cow lick D. D A abnormal vulva
What does Acc. Refer to in evaluating EPD s? A. A The higher the more reliable B. B The number in the contemporary group C. C The spread with in the contemporary group D. D The number of traits combined to develop the EPD.
Why would a seedstock producer incorporate inbreeding into their program A. A Improve Concentration of strong traits B. B Check for genetic defects C. C Could not find individuals outside of the herd to make improvements. D. D All the above
Which is the best EPD for born alive? A. - 2.4 B. B + 1.3 C. C + 0.8 D. 0.0 D
Which is the best EPD for Days to 230? A. A + 0.1 B. B + 3.2 C. C + 2.8 D. D + 1.1
Which is the best EPD for 21 day litter weight? A. A - 2.2 B. B 0.0 C C. + 3.2 D. D + 2.2
Which is the best EPD for loin eye area? A. A + 0.3 B. B - 0.3 C. C + 0.5 D. D - 0.1 MENU