Repeated evolution of dioecy from androdioecy in Acer

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منابع مشابه

Repeated evolution of dioecy from androdioecy in Acer.

The evolution of breeding systems was studied in the genus Acer, with special attention to the origin of androdioecy and dioecy, using a phylogenetic approach. Parsimony and maximum-likelihood techniques were used to infer the ancestral character state and trends in the evolution of breeding systems. Information on breeding systems was obtained from the literature, and phylogenetic relationship...

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Repeated evolution of dioecy from monoecy in Siparunaceae (Laurales).

Siparunaceae comprise Glossocalyx with one species in West Africa and Siparuna with 65 species in the neotropics; all have unisexual flowers, and 15 species are monoecious, 50 dioecious. Parsimony and maximum likelihood analyses of combined nuclear ribosomal ITS and chloroplast trnL-trnF intergenic spacer sequences yielded almost identical topologies, which were used to trace the evolution of t...

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The evolution of dioecy, heterodichogamy, and labile sex expression in Acer.

The northern hemisphere tree genus Acer comprises 124 species, most of them monoecious, but 13 dioecious. The monoecious species flower dichogamously, duodichogamously (male, female, male), or in some species heterodichogamously (two morphs that each produce male and female flowers but at reciprocal times). Dioecious species cannot engage in these temporal strategies. Using a phylogeny for 66 s...

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Sex Allocation: Evolution to and from Dioecy

Sex allocation in hermaphrodites should evolve in response to changes in the frequency of unisexuals. As predicted, it has now been demonstrated that hermaphrodites respond to the removal of males from experimental plant populations by increasing their allocation to male function.

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In between breeding systems: neither dioecy nor androdioecy explains sexual polymorphism in functionally dioecious worms.

Related species share genetic and developmental backgrounds. Therefore, separate-sex species that share recent common ancestors with hermaphroditic species may have hidden genetic variation for sex determination that causes some level of lability of expression of gender. Worms of the polychaete species Ophryotrocha labronica have separate, dimorphic sexes and their ancestor was hermaphroditic. ...

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ژورنال

عنوان ژورنال: New Phytologist

سال: 2004

ISSN: 0028-646X,1469-8137

DOI: 10.1111/j.1469-8137.2004.01242.x