Question

A horse breeder is interested in making genetic progress for racing the mile. She is evaluating three potential selection schemes. Data available for comparing each scheme includes a heritability of 0.35, a repeatability of 0.57, a phenotypic standard deviation of 2.3 seconds, and a phenotypic mean of 130 seconds. Females are selected in the top 80% 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 three alternative schemes for selecting males, and each of these schemes will include selecting males in the top 5% of the population. Compare each of these schemes and indicate which approach is the most optimal for maximizing genetic progress. a) Selection based on a single race record of the individual sire with an estimated generation interval of 6 years. b) Selection based on the average of three races of the individual with a generation interval of 6 years. c) Selection based on records of 5 progeny with 3 races each, and a generation interval of 10 years

Answer 1

As the males are chosen from the best 5 percent of the populace not at all like females in 80 percent of the populace, they have to experience extreme testing method to expand hereditary advancement. With the given information, the determination dependent on records of 5 descendants with 3 races each future well-suited to create adequate outcomes for observing the hereditary advancement. The age interim of 10 years would likewise help in the investigation by including the environmental impact  the genes  and their function. Along these lines, this plan is adept to follow so as to choose guys that can indicate maximal genetic progress.