For example, consumers have come to prefer more lean tissue and less fat in meat, and so the meat-type hog was developed in two decades of intensive selection and crossbreeding starting in the 1950s.
Since the mid-1960's, using intensive selection, artificial insemination and, more recently, embryo implantation, breeders and animal scientists have succeeded in doubling milk production in Holsteins, the world's top-producing dairy cow, said Dr. Les Hansen, professor of animal science at the University of Minnesota.
Following a weekend of intensive selection trials in Bath, Jackson is joined in the squad by fellow pilot Lamin Deen, whilst Jersey's Will Golder will provide back-up for their pair should either struggle with injuries.
According to FAO, one third of all livestock breeds have either perished or are threatened with extinction, due to intensive selection for high production by means of artificial insemination and embryo transfer and spreading of a small number of genetically narrow high-performance breeds around the whole world.
Elsewhere, these "ragged edges" may be trimmed by more intensive selection, resulting in only certain structural types existing in those phyla and restricting their further diversification.
Intensive selection also might have caused these very low MAF.
Presumably, episodes of novel intensive selection pressures are not uncommon in nature [ 14, 15, 75].
This could be partly due to more intensive selection and reproductive isolation in taurine breeds than among zebu cattle.
After successive biennials emphasizing craftsy fizz and punk scrappiness, there seems to be a more concept-intensive selection.
These data enabled us to develop a cost-effective gene targeting approach with the media-intensive selection, subcloning and expansion for screening and cryopreservation done in FBS-DMEM followed by passage of targeted clones in conditioned medium before aggregation.
The intensive jury selection, trials and appeals required in capital cases can take over a decade and run up a huge tab for the state.
