A rancher has a herd of ½ Red Angus, ¼ Angus, ¼ Hereford cows (daughters of Red
Angus sires and Angus x Hereford dams). She plans to mate her cows to ½ C
harolais, ½ Angus bulls. Assume F1 individual hybrid vigor for weaning weight is 30 lbs, and F1
maternal hybrid vigor for weaning weight is 48 lbs. Phenotypic means for weaning weight in
the purebred populations are 600, 600, 550 and 675 lbs, for Red Angus, Angus, Hereford and
d)Assuming all four breeds are unrelated, calculate the amount of individual, maternal
and total hybrid vigor for weaning weight that is retained in this cross.
e)Predict the weaning weight phenotypic mean for the
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