Crisscrossing

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Crisscrossing

 

in livestock raising, a special form of commercial crossbreeding to obtain highly productive animals. Crisscrossing has been known since the late 19th century. In Russia, the theoretical basis of the method was laid by E. A. Bogdanov, D. A. Kislovskii, and others. It consists of crossing two or more breeds and alternately mating the hybrid females over several generations with males of the original breeds. Crisscrossing is based on the phenomenon of heterosis in hybrids of not only the first but several succeeding generations. The most important prerequisite for successful crisscrossing is the scientific selection of well-matched breeds. Crisscrossing involving two breeds is called simple, and crisscrossing involving three or more breeds is called complex. Multiple-breed crisscrossing is most effective in swine breeding.

References in periodicals archive ?
The CrissCross bristles reach deep between teeth and along the gum line to lift and sweep away plaque, while the rotating PowerHead effectively surrounds teeth to loosen and whisk away plaque from surfaces and hard-to-reach back teeth.
No need, therefore, for a dark-skinned Othello; the historic setting of Shakespeare's drama is simply rendered by light tunics, minimal, laced-up bodices, and the crisscross pattern of the men's tights; and the Moor's palace is reduced to a mysterious space created with light shafts and trelliswork curtains, lozenge shapes that open and close.
Badler noticed that a crisscross pattern of long incisions sporting a pale, yellowish residue ran along the inside of the double-handled jar, which resides at the Royal Ontario Museum in Toronto.
In the new photos, deep grooves crisscross Gaspra's surface.
Three years of fragmented efforts to link key applications one by one, followed by a proliferation of enterprise portals that crisscross various back-end data sources, have left users with an unnecessarily complex and costly e-Business architecture," says report author Wayne T.
the largest specialty retailer of nutritional supplements, today announced that local franchise operator Dennis Clark will be honored with the Highest 2001 Sales Award in the Phoenix market as GNC executives crisscross the country holding annual meetings with franchisees.
The holes crisscross below the slab's surface to produce an array of distorted, non-spherical cavities.
the largest specialty retailer of nutritional supplements, today announced that local franchise operator Mubarak Ahmed Kahlon will be honored with the Highest 2001 Sales Award in the Houston market as GNC executives crisscross the country holding annual meetings with franchisees.