Earlier, the Norwich and Norfolk Terriers were for instance considered
variants of the same breed, but today they have been recognized as to separate breeds.
Not exact matches
The IGF1 protein is crucial for the growth
of mammals, including mice and humans, so Ostrander's group and other collaborators began collecting DNA from additional
breeds to see if they also shared the
same gene
variant.
Meaning, that if you can
breed a
variant of rye with enhanced zinc loading in the seeds, in all likelihood it will be possible to do the
same with wheat, barley, rice and so on.
The alternative model is that mutations
of large phenotypic effect underlie most
of these traits in dogs and that the
same variants have been transferred to a wide diversity
of dog
breeds leading to phenotypic diversity from a narrow genetic base [5], [8], [12].
Doing a genetic test and subsequently eliminating an individual from the
breeding population may not be the best strategy, as by targeting a particular allele at one genetic locus for removal from the gene pool
of a particular
breed, breeders may in fact increase allele frequency
of genetic
variants on alternative haplotypes at the
same, or a different locus, that are recessively deleterious.