•April 2024 Sire Summary Recap
• Top 200 daughter-proven bulls - production – April 2024
• Top 200 daughter-proven bulls - type – April 2024
• Genomic Young Sires April 2024
• Top 5 Active Bulls by Trait – April 2024
• Top 5 Genomic Bulls by Trait – April 2024
• Top 200 CPI Heifers – April 2024
• Top 200 CPI Cows – April 2024
• Top 50 Cows for PTAT - April 2024
• Top 50 Heifers for PTAT - April 2024
New! Top Polled Female Lists
• All-Time Class Leaders – Last updated April 2024
• 130% List - 1st Quarter 2024
Guernsey PTI Formula
(Updated April 2020)
(25*(PTAP/18))+(25*(PTAF/25))+ (15*(DPR/2.3))+(10*(UDC/.90))+(10*(FLC/1.03))+
(6*(PL/2.4))+(3*(PTA Strength/0.9)) – (3*(PTA Stature/1.8))+(3*(LIV/2.3))
UDC and FLC should be rounded to the nearest 10th prior to use in the PTI formula
Udder Composite (UDC)
(.15*(FU/1.33))+(.10*(RH/1.24))+(.10*(RW/1.22))+(.15*(UC/.84))+(.33*(UD/1.53))+(.15*(TP/1.05))-(.02*(TL/1.11)) /0.71
Foot & Leg Composite (FLC)
((.36*(RV/.42)) + (.48*(FA/.49)) – (.16*(RL/.65))) / 0.68
To see your cows and heifers on these lists...
Requirements for appearing on genetic lists:
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Active AI: bull must have semen available, recorded as Active with NAAB and be daughter-proven with a minimum amount of daughters on recorded test and classified.
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Genomic young sires: bulls must be genomic tested with a valid Stud Code recorded at NAAB and NOT yet daughter-proven.
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CPI/PTAT Cows: cows must have a calving recorded on DHI within the past 2 years, be purebred or GR, and scored GP-80 or higher.
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CPI/PTAT Heifers: heifers must be under 2 years old and be purebred or GR.
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Production recognition: cows must be purebred, GR, or PR. For Class Leaders, cows must meet a minimum requirement of test days.