Broad Sense Heritability: estimates percentage of genetic variance using all components of genetic variance
: ratio of genotypic variance (V_{G}) to phenotypic variance (V_{P})
Narrow Sense Heritability: estimates percentage of genetic variance using only additive variance
: ratio of additive genotypic variance (V_{A}) to phenotypic variance (V_{P})
: used to determine population response to artificial selection
The following variances were calculated for two traits in a herd of hogs.
Trait | V_{P} | V_{G} | V_{A} |
Back fat | 28.9 | 13.7 | 7.98 |
Body length | 49.1 | 27.2 | 12.4 |
Part A. Calculate broad-sense (H^{2} ) heritability for back fat in this herd. Enter your answer to three decimal places (example: 0.123).
Part B. Calculate broad-sense (H^{2} ) heritability for body length in this herd. Enter your answer to three decimal places (example: 0.123).
Part C. Calculate narrow-sense (h^{2} ) heritability for back fat in this herd. Enter your answer to three decimal places (example: 0.123).
Part D. Calculate narrow-sense (h^{2} ) heritability for body length in this herd. Enter your answer to three decimal places (example: 0.123).
Part E. Which of the two traits will respond best to selection by a breeder?
A. back fat
B. body length
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