a rancher runs a closed herd of breeding cattle she normally keeps and breeds the to 3700915
A rancher runs a closed herd of breeding cattle. She normally keeps and breeds the top 3% of her bul… Show more A rancher runs a closed herd of breeding cattle. She normally keeps and breeds the top 3% of her bull calves based on individual performance for yearling weight (YW). Her sires average three years of age when their offspring are born. She is studying two female replacement strategies: ? saving the top 20% of her heifers based on YW (Lf = 6.2 years) ? saving the top 60% based on YW (Lf = 3.2 years) a. If h2 YW = 0.5 and ?P = 60 lb, calculate the expected rate of genetic change in yearling weight for each strategy. b. What elements of the key equation is the rancher experimenting with? c. What elements appear to be more important? • Show less