Pie charts of progeny contributions of parent pairs (a) and parents (b) in breeding Pilot A. (a): the numbers and percentages represent the progeny contributions of nine parent pairs (full-sib families). (b): the numbers and percentages within parentheses represent the progeny contributions of six females and three males, and other numbers and percentages represented the contribution of maternal progeny contribution inside three paternal half-sib families (three circles).