What difficulties do breeders face in interspecies crossing?

With interspecific crossing, the offspring always turns out to be sterile – this is the main problem of selection. This applies to both animals and plants. When seeds obtained through selection go on sale, producers put a special mark – F1. This means that the seeds were obtained by interspecific crossing and will not produce offspring.

However, such plants are characterized by increased resistance to frost, heat or drought, or are distinguished by their taste. Animals obtained through selection produce a lot of milk, more hardy, more fleshy.

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