Genetic Mapping of the Locus Causing Hybrid Lethality in Interspecific Hybrids.

Hybrid lethality, a postzygotic mechanism of reproductive isolation, is a phenomenon that causes the death of F hybrid seedlings. Hybrid lethality is generally caused by the epistatic interaction of two or more loci. In the genus , has the dominant allele at the locus that causes hybrid lethality in F hybrid seedlings by interaction with allele(s).