BREEDING STRATEGY
Selective Breeding versus Crossbreeding. Selective
breeding of farmed plants and animals (for fast growth, disease
resistance, etc.) focuses on commercially desirable traits that are
moderately or highly heritable. The best performers are chosen as
breeders in successive generations. The main alternative strategy to
selective breeding is crossbreeding, also called hybridization, which
takes advantage of the unpredictable but sometimes considerably
improved performance exhibited by hybrid progeny compared with
that of their parents. This improved performance of crossbreeds is
known as hybrid vigor. Unlike selective breeding, in which
incremental genetic improvements are achieved with each
successive generation, crossbreeding generates a one-time
improvement, which must usually be regenerated every time seed is
mass produced. This means keeping t/vp separate sets of parental
broodstock.
BREEDING STRATEGYSelective Breeding versus Crossbreeding. Selectivebreeding of farmed plants and animals (for fast growth, diseaseresistance, etc.) focuses on commercially desirable traits that aremoderately or highly heritable. The best performers are chosen asbreeders in successive generations. The main alternative strategy toselective breeding is crossbreeding, also called hybridization, whichtakes advantage of the unpredictable but sometimes considerablyimproved performance exhibited by hybrid progeny compared withthat of their parents. This improved performance of crossbreeds isknown as hybrid vigor. Unlike selective breeding, in whichincremental genetic improvements are achieved with eachsuccessive generation, crossbreeding generates a one-timeimprovement, which must usually be regenerated every time seed ismass produced. This means keeping t/vp separate sets of parentalbroodstock.
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