Page 45 - Tapiri Angus 2021 Catalogue ebook
P. 45
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
CEd CEm GL BW 200W 400W 600W MCW Milk SS DC Cwt EMA Rib Rump RBY IMF
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
desirable and for others (e.g. days to calving), a negative response is desirable.
This index is primarily driven by getting live calves on the ground,
and producing an early maturing prime animal with added carcase traits
for improved carcase yield and marbling with no direct selection for
maternal traits.
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