dioecious

(redirected from Dioecy)
Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
Related to Dioecy: dioecious

dioecious

also

diecious

(dī-ē′shəs)
adj.
Biology Having the male and female reproductive organs, especially flowers, on different individuals.

di·oe′cism (-sĭz′əm) n.
di′oe′cy (-sē) n.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

dioecious

adjective Referring to the biological property in which a particular group of organisms has two distinct—male and female—sexual states.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

dioecious

(of plants) having male flowers carried by one individual and female flowers carried by another individual. The willow is an example of a dioecious plant. The term literally means ‘having two homes’. Compare MONOECIOUS.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
The scenario we have presented is based on the observation that, for most dioecious species, fitness is a function not only of genotype (gender) but also of genotype-by-environmental interactions; i.e., the evolution of dioecy in the monoecious pathway depends critically on ecological factors.
Several species are complex polyploids with a range of breeding systems, including apomixis and dioecy, that promote interspecific hybridization and introgression (Muntzing, 1940; Clausen, 1961).
Darwin (1851) found that barnacles exhibit a diverse array of sexual systems, including simultaneous hermaphroditism, dioecy (coexistence of females and males in a population), and androdioecy (hermaphrodites and males).
The gender ratio in 2-5-y-old geoducks was male biased relative to the 1:1 sex ratio observed in wild populations (P [much less than] 0.05), providing evidence for facultative protandric dioecy. Rates of maturation in cultured populations were synchronous with nearby wild populations.
This system is described as "temporal dioecy" by pollination biologists.
Pollinator selectivity and its implications for the evolution of dioecy and sexual dimorphism.
Andromonoecy has been reported for Cryptanthus subgenus Cryptanthus (Ramirez-Morillo 1996), a Southeastern Brazilian group of terrestrial species; dioecy has been reported for the genus Hechtia (however, there is a poligamomonoecious species), for the only species of Androlepis Brongn ex Houllet (A.
While strictly genetic or chromosomal dioecy is widespread, other types of reproduction such as hermaphroditism, parthenogenesis, and biased sex ratio appear to be the rule in many species.
Additionally, species in the Caryophyllaceae exhibit a range of breeding systems from hermaphroditism to dioecy (Muller 1883, Gleason and Cronquist 1963, Thrall et al.
As pointed out earlier, dioecy offers problems for a switch to animal pollinators because a similar attractant must exist in individuals of both genders, as is most striking in Gnetales.