Question

A horse breeder is interested in making genetic progress for racing the mile. She is evaluating two potential selection schemes. Data available for comparing each scheme includes a heritability of 0.30, repeatability of 0.61, a phenotypic standard deviation of 2.5 seconds, and a phenotypic mean of 130 seconds. Females are selected in the top 70% of the population with an accuracy based on the average of 3 race records, and the generation interval for females is 5 years. The breeder is considering two alternative schemes for selecting males, and each of these schemes will include selecting males in the top 5% of the population.

i.Selection based on a single race record of the individual sire with an estimated generation interval of 6 years.

ii.Selection based on records of 5 progeny with 3 races each, and a generation interval of 10

years.

a)Compare each of these schemes and indicate which approach is the most optimal for maximizing

genetic progress.

Answer 1

man Any: As the males are selected from the top 5 percent of the population unlike females in 80 percent of the population , they weed to undergo intense testing procedure to maximize genetic progress • witte the given data, the selection based on records of 5 progeny writte 3 races Each would be apt to produce sufficient result monitoring the genetic progress. The generation internal of to years would also help in the analysis by adding the Environmental impact on the genes and their function. so, this scheme is apt to follow in order to select males that can show maximal genetic progress wo