Individuals of the dam and sire lines with tested performance and combining ability, used in multiplication flocks to produce hatching eggs of final hybrids.
Related terms
Parent stock
Category of multiplication flocks whose mission is the second crossing of lines ...
Part per billion (ppb)
A unit equal to one billionth (10⁻⁹) of the whole.
Parts per million (ppm)
A unit equal to one millionth of the whole (0.001%).
Peak of egg production
The highest egg production achieved by a hen or flock during the laying period.
Pedigree hatching tray
Hatcher tray or box with partitions/holes that prevents uncontrolled movement of...
Pekin of English type
A meat-type duck breed originating from China and refined in England; characteri...
