What difficulties arise when staging interspecific crosses?

Distant hybridization is the crossbreeding of different species. In crop production, using remote hybridization, a new grain crop was created – triticale, a hybrid of rye with wheat. This culture combines many properties of wheat (high baking qualities) and rye (the ability to grow on poor sandy soils). A classic example of interspecific hybrids in animal husbandry is a mule obtained by crossing a donkey with a mare, which is significantly superior to parents in terms of endurance and performance. In Kazakhstan, when crossing wild mountain sheep-argali with fine-fleeced sheep, the famous archaromerinous breed of sheep was created. However, the use of interspecific crosses has certain difficulties, because the resulting hybrids often turn out to be sterile (sterile) or infertile. Sterility of hybrids is associated with the absence of paired homologous chromosomes. This makes the conjugation process impossible. Therefore, meiosis cannot be completed, and germ cells do not form.

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