How is hybrid vigor caused by genetic variability?
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Asked in Genetic Engineering
What is the difference between hybridization and genetic engineering?
There is a good reason why you are confused. >In a sense genetic engineering and hybridization both accomplish the >same >thing - they both result in new genetic types. >The difference is in how they acccomplish this. > >Hybrids come from seeds that are developed by cross-pollinating >specific >parental types so that the next generation will be a very uniform crop >with >hybrid vigor. Hybrid vigor is typically observed in outcrossing >species >(grasses and grains for example) when two very different inbred lines >are >cross pollinated. The hybrid gets half of its genes from each parent. > >Genetic engineering usually refers to biotechnological methods that >can be >used to insert a very small piece of genetic material (DNA) so that >the >resulting plants can be nearly identical to the parent, except for the >gene >or genes that were inserted. > >Nowadays, some hybrids may have genes that are artificially inserted, >using >high tech biotechnology methods. But, generally speaking, hybrids >are not >genetically engineered, that is , not using high-tech or >biotechnology. >> >In some sense though, plant breeders have been genetically engineering >crops >for hundreds of years, because they have been using traditional >hybridization (cross pollination) techniques to obtain new >(recombinant) types. > >I hope this explanation is helpful.