Breed Statistics

Conformation & Analysis

Classification Validation

Statistical Data of IHFA Herds

by Dr Patrick Kelly, 2011

Milk Production versus Conformation

The graph shows the average milk yield (total) for each lactation (1st lactation- 6th lactation) across all classification scores. The records used are milk recording records from 2005 to 2010. The  graph shows as classification improves there is a corresponding increase in milk production per lactation. The analysis used to calculate the figures accounted for herd and year affects. It looks at the range of classification from poor to excellent classification.

 

The graph shows the average milk yield (total) for each lactation (1st lactation- 6th lactation) across all classification scores. The records used are milk recording records from 2005 to 2010. The  graph shows as classification improves there is a corresponding increase in milk production per lactation. The analysis used to calculate the figures accounted for herd and year affects. It looks at the range of classification from poor to excellent classification.

 

 

 Solids versus Conformation

The graph shows the average milk yield (total) for each lactation (1st lactation- 6th lactation) across all classification scores. The records used are milk recording records from 2005 to 2010. The  graph shows as classification improves there is a corresponding increase in milk production per lactation. The analysis used to calculate the figures accounted for herd and year affects. It looks at the range of classification from poor to excellent classification.

 

The graph shows the average milk yield (305 Day) for each lactation (1st lactation- 6th lactation) across all classification scores. The records used are milk recording records from 2005 to 2010. The  graph shows as classification improves there is a corresponding increase in milk production per lactation. The analysis used to calculate the figures accounted for herd and year affects. It looks at the range of classification from poor to excellent classification.

 

Milk Production versus Conformation

                 Average lactations reached by 1st lactation animals
                                         calved in 2005 & 2006 

This is the average number of lactations reached by 1st lactation animals calved in 2005 and 2006. It shows clearly that the higher classified animals lasted longer and had more lactations on average. You can see from the graph that on average the VG animals had an extra lactation than the poor classified animals.

The graph shows the average age at calving for each lactation (1st lactation- 6th lactation) across all classifications. The records used are milk recording records from 2005 to 2010. The  graph shows little difference between ages of animals across each classification group for each lactation. The analysis used to calculate the figures accounted for herd and year affects.

 

Index to abbreviations of Conformation Scores

EX = Excellent – 90 – 97 points
EX (3E) = No. in brackets denotes the no. of times cow scored EX
VG = Very good – 85 – 89 points
GP = Good plus – 80 – 84
G = Good – 75 – 79
F = Fair – 65 – 74
P = Poor – 50 – 64

 

 

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