A few animal species are the end result of hybridization. The Lonicera fly is a natural hybrid. The American purple wolf seems to be a hybrid of the grey wolf and the coyote, even though its taxonomic fame has been a topic of controversy. The European suitable for eating frog is a semi-everlasting hybrid among pool frogs and marsh frogs; its populace requires the continued presence of as a minimum one of the determine species. Cave paintings suggest that the European bison is a natural hybrid of the aurochs and the steppe bison.
Plant hybridization is greater commonplace as compared to animal hybridization. Many crop species are hybrids, consisting of drastically the polyploid wheats: some have four units of chromosomes (tetraploid) or 6 (hexaploid), at the same time as different wheat species have (like most eukaryotic organisms) units (diploid), so hybridization occasions probable involved the doubling of chromosome sets, inflicting instantaneous genetic isolation.
Hybridization can be vital in speciation in some plant companies. However, homoploid hybrid speciation (now not growing the number of sets of chromosomes) may be uncommon: via 1997, handiest 8 herbal examples had been fully described. Experimental research advise that hybridization gives a speedy direction to speciation, a prediction confirmed by the reality that early technology hybrids and ancient hybrid species have matching genomes, meaning that after hybridization has occurred, the brand new hybrid genome can stay solid.
Many hybrid zones are known where the tiers of species meet, and hybrids are continually produced in first-rate numbers. These hybrid zones are beneficial as organic model structures for studying the mechanisms of speciation. Recently DNA analysis of a endure shot via a hunter inside the North West Territories confirmed the life of certainly-occurring and fertile grizzly–polar endure hybrids.