A hypothesis for the evolution of androdioecy: the joint influence of reproductive assurance and local mate competition in a metapopulation [PDF]
, 2000 In a subdivided population with recurrent local extinction and re-colonisation, competition amongst related pollen or sperm to fertilise ovules or eggs (`local mate competition') is expected to select for female-biased sex allocation. Population turnover
Pannell, John, Pannell, JR
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A TEST OF THE SPONTANEOUS HETEROSIS HYPOTHESIS FOR UNISEXUAL VERTEBRATES [PDF]
Evolution, 1987 The coupling between clonal modes of reproduction and hybridization in unisexual vertebrates has led to the hypothesis that heterosis accounts for their ecological success (the "spontaneous heterosis" hypothesis). High levels of genic heterozygosity characteristic of unisexual-hybrid vertebrates are believed to result in enhanced growth, survivorship ...
Jeffrey D, Wetherington +2 more
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UNISEXUAL/BISEXUAL BREEDING COMPLEXES IN POECILIIDAE: WHY DO MALES COPULATE WITH UNISEXUAL FEMALES? [PDF]
Evolution, 1988 Unisexual poeciliid fishes live as sexual parasites in breeding complexes with related bisexual species. Males of the host species copulate with unisexual females as well as with con-specifics, thus maintaining the unisexuals. Copulation with a unisexual offers no selective benefit for a male.
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Unexpectedly high genetic variation in large unisexual clumps of the subdioecious plant Honckenya peploides [PDF]
, 2010 Honckenya peploides is a subdioecious dune plant that reproduces both sexually and by clonal growth. In northwest Spain this species was found to exhibit an extreme spatial segregation of the sexes, and our objective was to investigate genetic variation ...
Sanchez Vilas, Julia +5 more
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Comparative Cytogenetics, 2018 Polyploidy, the possession of more than two sets of chromosomes, is a major biological process affecting plant evolution and diversification. In the Cactaceae, genome doubling has also been associated with reproductive isolation, changes in breeding ...
Carina Gutiérrez-Flores +3 more
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Evolutionary Diversity and Turn-Over of Sex Determination in Teleost Fishes [PDF]
, 2009 Sex determination, due to the obvious association with reproduction and Darwinian fitness, has been traditionally assumed to be a relatively conserved trait.
Mank, JE, Avise, JC
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The Australian scincid lizard Menetia Greyii: A new instance of widespread vertebrate parthenogenesis [PDF]
, 2003 Molecular data derived from allozymes and mitochondrial nucleotide sequences, in combination with karyotypes, sex ratios, and inheritance data, have revealed the widespread Australian lizard Menetia greyii to be a complex of sexual and triploid unisexual
Adams, M. +4 more
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The biology and ecology of lotic Tardigrada [PDF]
, 2000 1. Tardigrades comprise a micrometazoan phylum that is a sister group of the arthropods. 2. They are components of the meiobenthos in lotic habitats, and ≃ 50-70 species have been reported in such habitats world-wide.
Marley, Nigel J. +3 more
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Fluidity and Inconstancy: Australian Bush Tomatoes as an Exemplar of Non-Normative Sex Expression [PDF]
, 2023 Solanum, a genus of ~1500 global species, is one of the more interesting plant groups in which to study reproductive biology and ecology. Overwhelmingly, species in this group express full cosexuality, where individual plants have flowers containing both
Christopher T Martine +1 more
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Reproductive biology and sexual dimorphism in the lizard Lepidophyma smithii (Squamata: Xantusiidae) [PDF]
, 2016 The squamata reptiles present a wide array of reproductive strategies. In the genus Lepidophyma from the neotropical family Xantusiidae, there are 19 species, all of them live- bearing and diploid. Obligatory unisexuality is also present in some species.
Kukačková, Dominika
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