Gynodioecy
Coexistence of female and hermaphrodite within a population / From Wikipedia, the free encyclopedia
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Gynodioecy is a rare breeding system that is found in certain flowering plant species in which female and hermaphroditic plants coexist within a population. Gynodioecy is the evolutionary intermediate between hermaphroditism (exhibiting both female and male parts) and dioecy (having two distinct morphs: male and female).
Gynodioecy is sometimes considered a mixed breeding system comparable with trioecy and androdioecy.[1] It is also considered a dimorphic sexual system alongside dioecy and androdioecy.[2]
Gynodioecy occurs as a result of a genetic mutation that inhibits a hermaphroditic plant from producing pollen, while keeping the female reproductive parts intact. Gynodioecy is extremely rare, with fewer than 1% of angiosperm species exhibiting the breeding system. Some notable taxa that exhibit a gynodioecious mating system include Beta vulgaris (wild beet), Lobelia siphilitica, Silene, and Lamiaceae.