[Guernsey Cow][American Guernsey Association]

Genetic Evaluation & Production Information

April 2008

[] Top 100 Bull Rankings April 2008

[]Active AI List April 2008 - Production with links to pedigrees and web pages for each bull!

[]Active AI List April 2008 - Type

[]Top 300 CPI Cows April 2008

[]Top 100 Heifers for PA CPI April 2008

[]Young Sires

[]Find a Bull by NAAB #


[]All-Time Class Leaders

[]What Bulls had the Most Daughters Scored?

[]What Bulls had the Most Daughters on Test?

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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?

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American Guernsey Association
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