Trioecy

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Trioecy, tridioecy or subdioecy, is a

plants and animals.[1][2] Trioecy, androdioecy and gynodioecy may be described as mixed mating systems.[3]

Evolution of trioecy

Trioecy may be an unstable transient state

chromosomal duplication plays an important part in the evolution of trioecy.[7]

But one study found that trioecy can be stable under nucleocytoplasmic sex determination.[8] Another theoretical analysis indicates that trioecy could be evolutionary stable in plant species if a large amount of pollinators vary geographically.[9]

Occurrence

Trioecy is a relatively common sexual system in plants,[10] estimated to occur in about 3.6% of flowering plant species,[8] although most reports of trioecy could be misinterpretations of gynodioecy.[11] It is rare as well as poorly understood in animals.[10]

Species that exhibit trioecy

The following species have been observed to exhibit a trioecious breeding system.

Plants

Animals

See also

References