Page 13 - Dandaloo Sale Catalogue eBook.pdf

HDT Index (heifer/dairy terminal) NB. It is important point to be aware that while no emphasis has been
placed on some traits, for example maternal traits in the HDT, they still
New Zealand Angus Heifer/Dairy Terminal Index - Predicted Response may be selected for indirectly through positive or negative correlations
with other traits, as is the case with Days to Calving in the HDT.
Expected Change in Individual Traits Accuracy (%) is based on the amount of performance information

available on the animal and its close relatives - particularly the
number of progeny analysed. Accuracy is also based on the
heritability of the trait and the genetic correlations with other
recorded traits. Hence accuracy indicates the “confidence level” of
CEd CEm GL BW 200W 400W 600W MCW Milk SS DC Cwt EMA Rib Rump RBY IMF the EBV. The higher the accuracy value the lower the likelihood of
change in the animal’s EBV as more information is analysed for that
Above the 0 line (X axis) selects for more positive numbers and below the line selects
for more negative numbers. For some traits (e.g. growth), a positive response is animal or its relatives. Even though an EBV with a low accuracy
desirable and for others (e.g. days to calving), a negative response is desirable. may change in the future, it is still the best estimate of an animal’s
genetic merit for that trait. As more information becomes available,
This index is primarily driven by getting live calves on the ground, an EBV is just as likely to increase in value, as it is to decrease.
and producing an early maturing prime animal with added carcase traits Accuracy values range from 0-99%. The following guide is given
for improved carcase yield and marbling with no direct selection for for interpreting accuracy:
maternal traits. For further information please contact NZ Angus or TACE.

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