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Rear Teat Placement


The trait rear teat placement first appeared as a primary linear trait in the August, 2006 genetic updates.

Background information:

Rear teat placement measures the distance between the rear teats. On the 50 point scale,
1= 4.5 inches between rear teats; 25 = 2.0 inches distance; 50 = crossed teats. Every 10 points is equal to 1.0 inch distance between the rear teats. Holstein classifiers starting recording this trait in January 2003.

This trait has a heritability of 32%. It has good agreement with evaluations from other countries as shown by the genetic correlations.

Correlation matrix for:    REAR TEAT PLACEMENT
AUS BEL CAN CHE DEU DFS ESP EST FRA GBR ITA NLD NZL
0.91 0.93 0.93 0.87 0.94 0.92 0.94 0.93 0.93 0.96 0.96 0.95 0.89

Presentation:

Genetic values presented as STAs with negative values are labeled as Wide and positive values are labeled as Close.
In the linear profile, tear teat placement follows front teat placement and comes before teat length.

Rear teat placement is also included into the Udder Composite (UDC) as of May 2007.


 

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