Results 261 to 270 of about 815,782 (289)
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Acta Ecologica Sinica, 2009
Abstract Herkogamy may act as a mechanism to reduce interference between the reproductive functions of female and male organs, but too great a distance between stigmas and anthers may also decrease the outcross pollen transfer and male and female fitness.
Cheng-Jiang Ruan +3 more
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Abstract Herkogamy may act as a mechanism to reduce interference between the reproductive functions of female and male organs, but too great a distance between stigmas and anthers may also decrease the outcross pollen transfer and male and female fitness.
Cheng-Jiang Ruan +3 more
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Functional Ecology, 2012
Summary1.Unreliable pollinator service is thought to promote the evolution of self‐compatible plant breeding systems, because selfing may provide reproductive assurance when outcrossing opportunity is limited. The recurrent evolution of self‐compatible homostyly from obligately outcrossing heterostylous species has been regarded as a classic example of
de Vos, Jurriaan M +4 more
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Summary1.Unreliable pollinator service is thought to promote the evolution of self‐compatible plant breeding systems, because selfing may provide reproductive assurance when outcrossing opportunity is limited. The recurrent evolution of self‐compatible homostyly from obligately outcrossing heterostylous species has been regarded as a classic example of
de Vos, Jurriaan M +4 more
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Facultative dichogamy and reproductive assurance in partially protandrous plants
Oikos, 2001Following the pioneering work on pollination biology of the late 18th and 19th centuries, the phenomenon of dichogamy (the separation of presentation of pollen and stigmas in time) was, together with a plethora of other floral features, interpreted exclusively as an adaptive mechanism enhancing outcrossing.
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American Journal of Botany, 2001
The reproductive assurance hypothesis posits that selection favors self‐pollination in flowering plants where mates and/or pollinators are scarce. A corollary is that self‐pollinating populations are expected to be superior colonizers of mate‐ and pollinator‐scarce environments.
J A, Fausto, V M, Eckhart, M A, Geber
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The reproductive assurance hypothesis posits that selection favors self‐pollination in flowering plants where mates and/or pollinators are scarce. A corollary is that self‐pollinating populations are expected to be superior colonizers of mate‐ and pollinator‐scarce environments.
J A, Fausto, V M, Eckhart, M A, Geber
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Clonal reproduction assured by sister chromosome pairing in dojo loach, a teleost fish
Chromosome Research, 2018Wild-type dojo loach (Misgurnus anguillicaudatus) commonly reproduces bisexually as a gonochoristic diploid (2n = 50), but gynogenetically reproducing clonal diploid lines (2n = 50) exist in certain districts in Japan. Clones have been considered to develop from past hybridization event(s) between two genetically diverse groups, A and B, within the ...
Masamichi Kuroda +4 more
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Ecology, 2010
Pollen limitation of female fecundity is widespread among angiosperms, a signal that pollinators frequently fail to transfer pollen to fertilize all ovules. Recent surveys have suggested that pollen limitation is associated with floral specialization.
Silvana, Martén-Rodríguez +1 more
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Pollen limitation of female fecundity is widespread among angiosperms, a signal that pollinators frequently fail to transfer pollen to fertilize all ovules. Recent surveys have suggested that pollen limitation is associated with floral specialization.
Silvana, Martén-Rodríguez +1 more
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Evolution; international journal of organic evolution, 2008
Hermaphroditism allows considerable scope for contributing genes to subsequent generations through various mixtures of selfed and outcrossed offspring. The fitness consequences of different family compositions determine the evolutionarily stable mating strategy and depend on the interplay of genetic features, the nature of mating, and factors that ...
Lawrence D, Harder +2 more
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Hermaphroditism allows considerable scope for contributing genes to subsequent generations through various mixtures of selfed and outcrossed offspring. The fitness consequences of different family compositions determine the evolutionarily stable mating strategy and depend on the interplay of genetic features, the nature of mating, and factors that ...
Lawrence D, Harder +2 more
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Reproductive Assurance Through Autogamy in Some Annual Weed Species
Proceedings of the National Academy of Sciences, India Section B: Biological Sciences, 2014Weeds have evolved numerous adaptations to establish, survive and spread rapidly in disturbed habitats. Although prolific seed production is recognized as an important adaptation, studies on their pollination ecology, which is the basis of seed production, have remained neglected.
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Assuring survival of the fittest through reproduction
Journal of Reproductive Immunology, 2009A. Ziegler +3 more
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The evolution and prevalence of reproductive assurance in the genus Lachenalia
2013Since its proposal by Darwin (1876), the concept of reproductive assurance (RA) has been much discussed, modified and tested. It is hypothesized to occur under pollen- and/or mate-limitation, each of which can arise in a multitude of manners, and RA itself takes many forms.
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