Results 51 to 60 of about 68,621 (218)

Invasion Fosters Change: Independent Evolutionary Shifts in Reproductive Traits after Oxalis pes-caprae L. Introduction [PDF]

, 2016
Biological invasions offer optimal scenarios to study evolutionary changes under contemporary timescales. After long-distance dispersal, exotic species have to cope with strong mate limitation, and shifts toward uniparental reproduction have been ...
Daniela Tavares, Joana Costa, João Loureiro, Luis Navarro, Mariana Castro, Sílvia Castro, Victoria Ferrero   +6 more
core   +1 more source

Intensity and mode of Lindera melissifolia reproduction are affected by flooding and light availability

Ecology and Evolution, 2021
We studied the impact of flooding and light availability gradients on sexual and asexual reproduction in Lindera melissifolia (Walt.) Blume, an endangered shrub found in floodplain forests of the Mississippi Alluvial Valley (MAV), USA.
Theodor D. Leininger, Emile S. Gardiner, Brian Roy Lockhart, Nathan M. Schiff, Alphus Dan Wilson, Margaret S. Devall, Paul B. Hamel, Kristina F. Connor   +7 more
doaj   +1 more source

Sex and recombination in the H\"otzel aging model

, 2003
Why sex evolved and it prevails in nature remains one of the great puzzles of evolution. Most biologists would explain that it promotes genetic variability, however this explanation suffers from several difficulties. What advantages might sex confer? The
Sousa, A. O.
core   +2 more sources

Is Parthenogenesis Sexual or Asexual Reproduction? [PDF]

Nature, 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

Mating-type genes of the anamorphic fungus Ulocladium botrytis affect both asexual sporulation and sexual reproduction

Scientific Reports, 2017
Ulocladium was thought to be a strictly asexual genus of filamentous fungi. However, Ulocladium strains were shown to possess both MAT1-1-1 and MAT1-2-1 genes as observed in homothallic filamentous Ascomycetes. Here, we demonstrate that the U.
Qun Wang, Shi Wang, Chen Lin Xiong, Timothy Y. James, Xiu Guo Zhang   +4 more
doaj   +1 more source

Reproduction-associated pathways in females of gibel carp (Carassius gibelio) shed light on the molecular mechanisms of the coexistence of asexual and sexual reproduction

BMC Genomics
Gibel carp (Carassius gibelio) is a cyprinid fish that originated in eastern Eurasia and is considered as invasive in European freshwater ecosystems. The populations of gibel carp in Europe are mostly composed of asexually reproducing triploid females (i.
Florian Jacques, Tomáš Tichopád, Martin Demko, Vojtěch Bystrý, Kristína Civáňová Křížová, Mária Seifertová, Kristýna Voříšková, Md Mehedi Hasan Fuad, Lukáš Vetešník, Andrea Šimková   +9 more
doaj   +1 more source

A key role for sex chromosomes in the regulation of parthenogenesis in the brown alga Ectocarpus.

PLoS Genetics, 2019
Although evolutionary transitions from sexual to asexual reproduction are frequent in eukaryotes, the genetic bases of these shifts remain largely elusive.
Laure Mignerot, Komlan Avia, Remy Luthringer, Agnieszka P Lipinska, Akira F Peters, J Mark Cock, Susana M Coelho   +6 more
doaj   +1 more source

Patterns of molecular evolution in a parthenogenic terrestrial isopod (Trichoniscus pusillus) [PDF]

PeerJ
The “paradox of sex” refers to the question of why sexual reproduction is maintained in the wild, despite how costly it is compared to asexual reproduction. Because of these costs, one might expect nature to select for asexual reproduction, yet sex seems
Emily Yarbrough, Christopher Chandler
doaj   +2 more sources

Simulated Coevolution in a Mutating Ecology

, 2000
The bit-string Penna Model is used to simulate the competition between an asexual parthenogenetic and a sexual population sharing the same environment. A new-born of either population can mutate and become a part of the other with some probability.
Martins, J. S. Sa'
core   +1 more source

Stable demographic ratios of haploid gametophyte to diploid sporophyte abundance in macroalgal populations.

PLoS ONE
Macroalgal populations often consist of free-living haploid (gametophyte) and diploid (sporophyte) stages. Various ecological studies have been conducted to examine the demographic diversity of haploid-diploid populations with regard to the dominant ...
Kazuhiro Bessho
doaj   +1 more source