What determines success or failure? Since Genomics were introduced, we should
have reset our thinking on “inbreeding effects” away from pedigree and point it
where it comes from – gene possession.
Animals can appear unrelated and possess many genes
in common: animals can appear closely related and yet not possess as many genes
in common. Thus predicting physical
characteristics and functionality of the physique from pedigree alone has
always been an inexact exercise, that has proven elusive as well under linear
trait mating.
Identifying the physical genotype (which is not the same as
linking a few gene markers to linear traits) to date has not been a focus of
much scientific exploration. But it has
been the 65 year focus of “aAa” breeding guide and has contributed to
the success of linebreeding as well as the avoidance of inbreeding effects
as sire pedigree relationships continue to increase.
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