Seven generations of selection in Japanese quail for breast meat weight (line BWI) or proportion (lines BPI (up) and BPD (down)) using prediction equations based on liveweight and measures of breast muscle length, width and depth (by ultrasound), resulted in substantial response in breast yield in all lines. Response in breast weight was achieved through combined response in breast proportion and liveweight in the BWI line, and through response in proportion alone in the BPI and BPD lines. The yield of other cuts was not decreased in the BWI and BPI lines.

R. AE Pym, B. Popovic, D. AV Bodero

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 24: Sheep and goats (fibre); sheep and goats (meat and milk); poultry; horses; buffaloes., , 290–293, 1998
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