Results 51 to 60 of about 10,705 (212)

Cytology of Asexual Animals

open access: yes, 2009
We review the cytological mechanisms underlying asexual reproduction, i.e. reproduction without fertilization, in animals. Asexuality or parthenogenesis has evolved many times and the cytological mechanisms to restore the parental chromosome number can ...
Stenberg, Per,   +3 more
core   +1 more source

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

open access: yesPLoS 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   +6 more
doaj   +1 more source

Compromised DNA replication in gut cells underlies sensitivity to genotoxic stress in the tardigrade Hypsibius exemplaris

open access: yesThe FEBS Journal, EarlyView.
DNA damage in the tardigrade Hypsibius exemplaris elicits distinct cellular outcomes depending on replication status. While non‐replicating cells tolerate genotoxic stress, constitutively replicating cells undergo irreversible replication failure upon DNA damage, leading to loss of tissue homeostasis, fat depletion, sterility, and organismal death ...
Gonzalo Quiroga‐Artigas   +4 more
wiley   +1 more source

Wolbachia-induced parthenogenesis in a genus of phytophagous mites

open access: yes, 2001
The vertically transmitted endosymbiotic bacterium Wolbachia modifies host reproduction in several ways in order to enhance its own spread. One such modification results in the induction of parthenogenesis, where males, which are unable to transmit ...
Breeuwer, J.A.J., Weeks, A.R.
core   +1 more source

Bacteriomes, cryptic forms and evolution of a common wireworm pest species, Hypnoidus bicolor

open access: yesInsect Molecular Biology, EarlyView.
Wireworms are important agricultural pests, including Hypnoidus bicolor in the Canadian Prairies. Parthenogenetic and sexual populations of H. bicolor appear associated with different molecular clades. Bacterial community composition and structure were influenced by developmental stage, sampling location and host genetics.
Ivan Drahun   +5 more
wiley   +1 more source

Differential Varietal Responses in Faba Bean Concerning Pea Aphid and Pea Necrotic Yellow Dwarf Virus (PNYDV) When Intercropped With Oat

open access: yesJournal of Applied Entomology, EarlyView.
ABSTRACT The pest status of pea aphid (Acyrthosiphum pisum H.) in faba bean (Vicia faba L.) cultivation has gained importance because it transmits Pea necrotic yellow dwarf virus (PNYDV), a novel nanovirus in Europe. This study evaluated two faba bean varieties, ‘Fuego’ and ‘GL Sunrise’, grown under sole crop (SC) and intercrop (IC) conditions with oat
Ahmed Berawe   +3 more
wiley   +1 more source

Facultative parthenogenesis in California condors [PDF]

open access: yes, 2021
Parthenogenesis is a relatively rare event in birds, documented in unfertilized eggs from columbid, galliform, and passerine females with no access to males.
Martin Judson, Jessica   +11 more
core   +2 more sources

Sex Determination in Relation to Fertilization and Parthenogenesis

open access: yes, 1907
SEX DETERMINATION IN RELATION TO FERTILIZATION AND PARTHENOGENESIS Sex Determination in Relation to Fertilization and Parthenogenesis (25) (-
Wilson, Edmund B.
core   +1 more source

First Record of Arrhenophagus chionaspidis Aurivillius (Hymenoptera: Encyrtidae) Parasitizing White Mango Scale in Kenya: Its Potential Distribution and Prospects in Biocontrol

open access: yesJournal of Applied Entomology, EarlyView.
ABSTRACT The white mango scale, Aulacaspis tubercularis Newstead (Hemiptera: Diaspididae), is one of the most destructive pests of mango worldwide. Its current management in most of the invaded areas largely depends on the intensive use of chemical insecticides.
Francis Obala   +7 more
wiley   +1 more source

A robust biotechnology induces artificial genomic duplication via transient RNAi‐mediated suppression of OSD1 in rice

open access: yesJournal of Integrative Plant Biology, EarlyView.
Plant Polyploidization via Gene Interference, a robust technology for inducing polyploidy in various rice accessions, uses transient RNAi‐mediated suppression of OSD1 to induce genomic duplication. Two strategies were used to directly induce fertile autotetraploid plants in the first generation, thereby substantially shortening the breeding cycle ...
Zijun Lu   +9 more
wiley   +1 more source

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