Results 31 to 40 of about 27,197 (240)

Polyploidy in the adult Drosophila brain

open access: yeseLife, 2020
Long-lived cells such as terminally differentiated postmitotic neurons and glia must cope with the accumulation of damage over the course of an animal’s lifespan. How long-lived cells deal with ageing-related damage is poorly understood.
Shyama Nandakumar   +2 more
doaj   +1 more source

Regulated polyploidy in halophilic archaea [PDF]

open access: yes, 2006
Polyploidy is common in higher eukaryotes, especially in plants, but it is generally assumed that most prokaryotes contain a single copy of a circular chromosome and are therefore monoploid.
Jörg Soppa   +7 more
core   +1 more source

Evolution by duplication: paleopolyploidy events in plants reconstructed by deciphering the evolutionary history of VOZ transcription factors

open access: yesBMC Plant Biology, 2018
Background Facilitated by the rapid progress of sequencing technology, comparative genomic studies in plants have unveiled recurrent whole genome duplication (i.e. polyploidization) events throughout plant evolution.
Bei Gao   +9 more
doaj   +1 more source

Whole-Genome Doubling as a source of cancer: how, when, where, and why?

open access: yesFrontiers in Cell and Developmental Biology, 2023
Chromosome instability is a well-known hallmark of cancer, leading to increased genetic plasticity of tumoral cells, which favors cancer aggressiveness, and poor prognosis.
Natalia Sanz-Gómez   +3 more
doaj   +1 more source

Cytotaxonomical aspects of Antarctic mosses, with special reference to the proportion of polyploidy

open access: yesAntarctic Record, 1994
The evolutionary tendency concerning karyological features, especially the proportion of polyploidy and infraspecific polyploidy in Antarctic mosses is reviewed.
Hiroshi Okada, Hiroshi Kanda
doaj   +1 more source

Induced polyploidy deeply influences reproductive life cycles, related phytochemical features, and phytohormonal activities in blackberry species

open access: yesFrontiers in Plant Science, 2022
In some cases, polyploidy is an important phenomenon in the evolution of fruit crops. Polyploidy can be used in fruit breeding programs to develop varieties with higher yields and better fruit quality, as well as better adaptation to adverse ...
Nasrin Sabooni, Ali Gharaghani
doaj   +1 more source

Polyploidy on Islands: Its Emergence and Importance for Diversification

open access: yesFrontiers in Plant Science, 2021
Whole genome duplication or polyploidy is widespread among floras globally, but traditionally has been thought to have played a minor role in the evolution of island biodiversity, based on the low proportion of polyploid taxa present. We investigate five
Heidi M. Meudt   +7 more
doaj   +1 more source

Comparative DNA-methylome and transcriptome analysis reveals heterosis- and polyploidy-associated epigenetic changes in rice

open access: yesCrop Journal, 2023
Heterosis and polyploidy have an overwhelming influence on plant evolution. Recently, polyploid rice hybrids have been used to breed new rice varieties because they combine the advantages of both heterosis and polyploidy.
Xiaolan Rao   +14 more
doaj   +1 more source

Polyploidy in Gymnosperms [PDF]

open access: yesEvolution, 1959
The gymnosperms constitute a primitive group of seed plants which have a considerable evolutionary interest. A substantial amount of literature on the morphology of the group exists, but very little has been written about the various cytogenetic factors responsible for evolution within the group.
openaire   +1 more source

Frequency of polyploidy [PDF]

open access: yes, 2013
The frequency of polyploidy was determined from the data gathered in the generation of Table 2.
Wai Leong Tam (75914)   +17 more
core   +1 more source

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