Results 191 to 200 of about 3,609 (241)
Some of the next articles are maybe not open access.
Androdioecy and the evolution of dioecy
Biological Journal of the Linnean Society, 1984The likelihood that dioecy could evolve via androdioecy is examined. It is concluded that female-sterility mutations are unlikely to be able to invade populations of self-compatible hermaphrodite species, even if the resources that an hermaphrodite devotes to seed production can be diverted to yield increased survival and also to increase male ...
Deborah Charlesworth, Charlesworth D
exaly +2 more sources
Origins of Dioecy in the Hawaiian Flora
Ecology, 1995Because of its presumed high levels of dioecy (separate male and female plants), study of the native Hawaiian angiosperm flora has been important in development of many hypotheses about conditions favoring the evolution of dioecy. The importance of ecological correlates with dioecy has proven difficult to assess, however, because of lack of data on the
Ann K Sakai, Warren L Wagner
exaly +2 more sources
A Model for the Evolution of Dioecy and Gynodioecy
The American Naturalist, 1978A model for the evolution of gynodioecy from the hermaphrodite or monoecious condition is described, taking into account the effects of partial selfing and inbreeding depression. It is shown that a mutant causing male-sterility can be selected even if the female plants have the same ovule output as the hermaphrodites, but that the conditions for this ...
Brian Charlesworth, Deborah Charlesworth
openaire +2 more sources
Incidence, Correlates, and Origins of Dioecy in the Island Flora of New Caledonia
International Journal of Plant Sciences, 2014 Premise of research. Because it is an inherently risky sexual system, dioecy is globally rare. Attempts to explain unusually high incidences of dioecy on certain islands have generated a considerable literature on the relationships among dioecy, its ...
Mark A Schlessman +2 more
exaly +2 more sources
Evolutionary Transitions Between Hermaphroditism and Dioecy in Animals and Plants
Annual Review of Ecology, Evolution and Systematics, 2022We review transitions between hermaphroditism and dioecy in animals and (mainly flowering) plants. Although hermaphroditism and dioecy represent two end states in a sex-allocation continuum, both vary in major ways among clades.
J. Pannell, Crispin Y Jordan
semanticscholar +1 more source
Young evolutionary origins of dioecy in the genus Asparagus
American Journal of BotanyPREMISE Dioecy (separate sexes) has independently evolved numerous times across the angiosperm phylogeny and is recently derived in many lineages. However, our understanding is limited regarding the evolutionary mechanisms that drive the origins of ...
Philip C Bentz, Jun-Bo Yang
exaly +2 more sources
RECURRENT EVOLUTION OF DIOECY IN BRYOPHYTES
Evolution, 2012The origin and maintenance of separate sexes (dioecy) is an enduring evolutionary puzzle. Although both hermaphroditism and dioecy occur in many diverse clades, we know little about the long-term evolutionary consequences of changing sexual system. Here we find evidence for at least 133 transitions between sexual systems in mosses, representing an ...
Stuart F, McDaniel +2 more
openaire +2 more sources
Cryptic dioecy in flowering plants
Trends in Ecology & Evolution, 1991In some dioecious plant species, mates and/or females have large and presumably costly opposite-sex structures that are sterile. This is termed 'cryptic dioecy'. Several new cases of cryptic dioecy have recently been studied. They may give information about the minimal requirements for the evolution of separate sexes from hermaphroditism, because the ...
S S, Mayer, D, Charlesworth
openaire +2 more sources
Diversification, dioecy and dimorphism in schistosomes
Trends in Parasitology, 2006In addition to causing one of the great neglected diseases of the world, schistosomes have unusual biological features that further command attention, including their habit of living in the blood of their hosts and the presence of separate, dimorphic sexes.
Eric S, Loker, Sara V, Brant
openaire +2 more sources