hybrid inviability

biology

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Last updated

June 29, 2026

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Hybrid inviability is a biological concept that occurs when offspring resulting from the mating of two different species (hybrids) fail to develop into mature individuals. This is a type of reproductive isolating mechanism that takes effect after fertilization.

While some hybrids are fertile and can even lead to the formation of new species, hybrid inviability means that the hybrid embryos often die during early developmental stages, before birth. This is common in plants, where hybrid seeds may not germinate or die soon after. Hybrid inviability prevents the successful reproduction between different species, contributing to the maintenance of distinct species.12

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evolution
Hybrid inviability
Occasionally, prezygotic mechanisms are absent or break down so that interspecific zygotes (fertilized eggs) are formed. These zygotes, however, often fail to develop into mature individuals. The hybrid embryos of sheep and goats, for example, die in the early developmental stages before birth.…
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Occasionally, prezygotic mechanisms are absent or break down so that interspecific zygotes (fertilized eggs) are formed. These zygotes, however, often fail to develop into mature individuals. The hybrid embryos of sheep and goats, for example, die in the early developmental stages before birth.…
Read More