Results 51 to 60 of about 2,997 (195)
Formation of the synaptonemal complex in a gynogenetic allodiploid hybrid fish
Frontiers in Genetics, 2023 Introduction: The correct pairing and separation of homologous chromosomes during meiosis is crucial to ensure both genetic stability and genetic diversity within species. In allodiploid organisms, synapsis often fails, leading to sterility.
Jing Wang +10 more
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Frontiers in Plant Science, 2018 Polyploid genomes evolve and follow a series of dynamic transfigurations along with adaptation and speciation. The initial formation of a new polyploid individual within a diploid population usually involves a triploid bridge, a two-step mechanism of ...
Diego Hojsgaard
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Unreduced gametes and neopolyploids in natural populations of Achillea borealis (Asteraceae) [PDF]
Heredity, 2006 Polyploidy is a major mechanism of speciation and adaptation, yet little is known about the origins of polyploids in natural species. I investigated gametic nonreduction and neopolyploid formation in natural tetraploid populations of Achillea borealis (Asteraceae), an autopolyploid complex consisting of tetraploid and hexaploid cytotypes.
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Heat stress induces unreduced male gamete formation by targeting meiocyte translation
, 2022 ABSTRACT Heat stress promotes the formation of unreduced (2n) male gametes through meiotic restitution, a driving force of evolutionary polyploidisation. Here we report that the molecular mechanism underlying heat tolerance of the meiotic division program in Arabidopsis thaliana ...
Cédric Schindfessel +7 more
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TAXON, Volume 75, Issue 2, April 2026.Abstract Solanum malmeanum, a wild relative of the potato (S. tuberosum), is native to Argentina, Brazil, Paraguay and Uruguay. This wild potato species belongs to the tertiary gene pool (2x = 2n = 24, 1EBN – Endosperm Balance Number) and possesses valuable traits for potato breeding. Understanding its reproductive mechanisms is crucial for effectively
Rodrigo Nicolao +2 more
wiley +1 more source
High temperature-induced production of unreduced pollen and its cytological effects in Populus
Scientific Reports, 2017 Temperature change is of potential to trigger the formation of unreduced gametes. In this study, we showed that short periods of high temperature treatment can induce the production of 2n pollen in Populus pseudo-simonii Kitag.
Jun Wang +3 more
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Speciation Success of Polyploid Plants Closely Relates to the Regulation of Meiotic Recombination
Frontiers in Plant Science, 2018 Polyploidization is a widespread phenomenon, especially in flowering plants that have all undergone at least one event of whole genome duplication during their evolutionary history.
Alexandre Pelé +3 more
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Leaf transcriptome differences between diploid and tetraploid bahiagrass
The Plant Genome, Volume 19, Issue 1, March 2026.Abstract Polyploid individuals of the subtropical forage grass Paspalum notatum Flüggé (bahiagrass) exhibit distinct phenotypes, including apomixis, enhanced vigor, gigas effects, and increased stress tolerance. While apomixis‐based breeding programs supported by molecular tools have improved agronomic traits such as growth habit, forage dry matter ...
Maricel Podio +5 more
wiley +1 more source
Meiotic observation on ‘Bartzella’, an intersectional hybrid of Paeonia
Xibei zhiwu xuebao[Objective] Most intersectional hybrids in Paeonia are triploids and generally sterile, producing a small number of hybrid offspring. Observing the meiotic chromosome behaviors of ‘Bartzella’, an intersectional hybrid with high ornamental value and ...
RONG Qi +5 more
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Abnormal spindles in second meiosis in canola (Brassica napus and Brassica campestris)
Brazilian Archives of Biology and Technology, 1999 Studies were carried out on the occurrence of abnormal spindles in the second meiotic division in some canola cultivars recently introduced in Brazil.
Alice Maria de Souza +2 more
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