![]() ![]() Genetic Evaluation & Production Information April 2008
Guernsey PTI Formula (Updated Nov. 2006) (25*(PTAP/14))+(25*(PTAF/19))+(10*(PTAT/.84))+(10*(UDC/.70))+(10*(FLC/.68))+ (10*(PL/2.39))+(3*(DPR/1.24))+(4*((3-SCS)/.17))+(3*(PTA Strength/0.95)) UDC and FLC should be rounded to the nearest 10th prior to use in the PTI formula Udder Composite (UDC) (.15*(FU/1.33))+(.15*(RH 1.24))+(.05*(RW/1.22))+(.15*(UC/.84))+(.33*(UD/1.53))+(.15*(TP/1.05))-(.02*(TL/1.11)) Foot & Leg Composite (FLC) (.36*(RV/.42)) + (.48*(FA/.49)) - (.16*(RL/.65)) You MUST Be Kidding...What Do All These Numbers Mean? ![]() ![]() ![]()
|