Results 21 to 30 of about 6,274,708 (264)

Exploring the relationship between tychoparthenogenesis and inbreeding depression in the Desert Locust, Schistocerca gregaria [PDF]

open access: yes, 2017
Tychoparthenogenesis, a form of asexual reproduction in which a small proportion of unfertilized eggs can hatch spontaneously, could be an intermediate evolutionary link in the transition from sexual to parthenogenetic reproduction.
Blondin, Laurence   +4 more
core   +1 more source

Reproductive assurance through autogamous self-pollination across diverse sexual and breeding systems [PDF]

open access: yes, 2015
Pollination becomes a constraint when conspecific plants and/or their pollinators become scarce. Many plant species have evolved autogamous self-pollination as a means of reproductive assurance (RA) under pollination-uncertain environments. So far RA has
Shivanna, KR
core   +1 more source

The Evolution of Self-Fertilization in Density-Regulated Populations [PDF]

open access: yes, 2002
We study the evolution of selfing in hermaphrodites to reveal the demographic conditions that lead to intermediate selfing rates. Using a demographic model based on Ricker-type density regulation we first assume that independent of population density ...
Cheptou, P.-O., Dieckmann, U.
core   +2 more sources

Comparative study of floral biology using detergent and confirm selfincompatibility system in protogynous lines of Indian mustard (Brassica juncea)

open access: yesThe Indian Journal of Agricultural Sciences, 2018
Seven genotypes of mustard [Brassica juncea (L.) Czernj and Coss.], protogynous lines (F3-5 generation), cytoplasmic male sterility (CMS) line and different concentrations (3, 5 and 8% (w/v)) of detergent (synthetic detergent powder was used in present ...
CHANDU SINGH   +5 more
doaj   +1 more source

Reproductive assurance drives transitions to self-fertilization in experimental Caenorhabditis elegans [PDF]

open access: yes, 2014
Evolutionary transitions from outcrossing between individuals to selfing are partly responsible for the great diversity of animal and plant reproduction systems.
Chelo, Ivo M   +3 more
core   +2 more sources

Selfing strategy in the mixed mating system of Tulipa sinkiangensis in unstable pollination environment in early spring

open access: yesXibei zhiwu xuebao
[Objective] In unstable pollination environments, bisexual flowering plants often possess potential selfing ability. Given the mating cost of selfing, investigating selfing strategies in different environments are critical for the understanding of ...
JIAO Fangfang   +3 more
doaj   +1 more source

The MED30 subunit of mediator complex is essential for early plant development and promotes flowering in arabidopsis thaliana [PDF]

open access: yes, 2019
Mediator is a large multiprotein complex that is required for the transcription of most, if not all, genes transcribed by RNA Polymerase II. A core set of subunits is essential to assemble a functional Mediator in vitro and, therefore, the corresponding ...
Arellano, Sofía Maité   +10 more
core   +1 more source

Differential expression of conserved germ line markers and delayed segregation of male and female primordial germ cells in a hermaphrodite, the leech helobdella. [PDF]

open access: yes, 2013
In sexually reproducing animals, primordial germ cells (PGCs) are often set aside early in embryogenesis, a strategy that minimizes the risk of genomic damage associated with replication and mitosis during the cell cycle.
Cho, Sung-Jin   +2 more
core   +2 more sources

A New Advanced Backcross Tomato Population Enables High Resolution Leaf QTL Mapping and Gene Identification. [PDF]

open access: yes, 2016
Quantitative Trait Loci (QTL) mapping is a powerful technique for dissecting the genetic basis of traits and species differences. Established tomato mapping populations between domesticated tomato (Solanum lycopersicum) and its more distant interfertile ...
Chitwood, Daniel H   +10 more
core   +3 more sources

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