Results 21 to 30 of about 690,322 (292)

Detection of Gene Flow from Sexual to Asexual Lineages in Thrips tabaci (Thysanoptera: Thripidae). [PDF]

open access: yesPLoS ONE, 2015
Populations of Thrips tabaci are known to have two sympatric but genetically isolated reproductive modes, arrhenotoky (sexual reproduction) and thelytoky (asexual reproduction).
Xiao-Wei Li   +3 more
doaj   +1 more source

Origin, divergence, and phylogeny of asexual Epichloë endophyte in Elymus species from western China. [PDF]

open access: yesPLoS ONE, 2015
Asexual Epichloë species are likely derived directly from sexual Epichloë species that then lost their capacity for sexual reproduction or lost sexual reproduction because of interspecific hybridization between distinct lineages of sexual Epichloë and/or
Hui Song, Zhibiao Nan
doaj   +1 more source

Origins of asexuality in Bryobia mites (Acari: Tetranychidae) [PDF]

open access: yes, 2008
Background Obligate asexual reproduction is rare in the animal kingdom. Generally, asexuals are considered evolutionary dead ends that are unable to radiate. The phytophagous mite genus Bryobia contains a large number of asexual species.
Johannes A.J. Breeuwer   +8 more
core   +2 more sources

Genomic consequences and selection efficacy in sympatric sexual versus asexual kelps

open access: yesFrontiers in Marine Science, 2022
Genetic diversity can influence resilience and adaptative capacity of organisms to environmental change. Genetic diversity within populations is largely structured by reproduction, with the prevalence of asexual versus sexual reproduction often ...
Sofie Vranken   +10 more
doaj   +1 more source

Comparative transcriptome analysis of two reproductive modes in Adiantum reniforme var. sinense targeted to explore possible mechanism of apogamy

open access: yesBMC Genetics, 2019
Background Apogamy is a unique asexual reproduction in the ferns, in which somatic cells of gametophytes go through dedifferentiation and then differentiate into haploid sporophytes bypassing fertilization.
Qi Fu, Long-qing Chen
doaj   +1 more source

Muller's ratchet and mutational meltdowns [PDF]

open access: yes, 1993
We extend our earlier work on the role of deleterious mutations in the extinction of obligately asexual populations. First, we develop analytical models for mutation accumulation that obviate the need for time-consuming computer simulations in certain ...
Lynch, M.   +8 more
core   +1 more source

The mutational meltdown in asexual populations [PDF]

open access: yes, 1993
Loss of fitness due to the accumulation of deleterious mutations appears to be inevitable in small, obligately asexual populations, as these are incapable of reconstituting highly fit genotypes by recombination or back mutation. The cumulative buildup of
Lynch, M.   +6 more
core   +1 more source

The role of sexual vs. asexual recruitment of Artemisia wudanica in transition zone habitats between inter-dune lowlands and active dunes in Inner Mongolia, China [PDF]

open access: yesSolid Earth, 2016
Artemisia wudanica is an endemic, perennial, pioneering psammophyte species in the sand dune ecosystems of western Horqin Sand Land in northern China. However, no studies have addressed how sexual and asexual reproduction modes of A.
Y. Wang   +8 more
doaj   +1 more source

Asexual reproduction strategies and blooming potential in Scyphozoa [PDF]

open access: yes, 2014
Scyphistomae show different modes of propagation, occasionally allowing the sudden release of great numbers of medusae through strobilation leading to so-called jellyfish blooms.
Schiariti, Agustín   +8 more
core   +1 more source

Is Parthenogenesis Sexual or Asexual Reproduction? [PDF]

open access: yesNature, 1950
CYTOLOGISTS and others commonly refer to parthenogenesis as asexual reproduction. This usage is, for example, to be found in the books of Wilson1, Darlington2, and White3, along with the facts that indicate that parthenogenesis is a derivative of normal sexual reproduction.
openaire   +2 more sources

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