Evolution of
BMC Evolutionary Biology, 2011 Background Polyploidy has long been recognized as playing an important role in plant evolution. In flowering plants, the major route of polyploidization is suggested to be sexual through gametes with somatic chromosome number (2n). Parallel Spindle1 gene
Consiglio Federica M +4 more
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Mechanical shock during egg de-adhesion and post-ovulatory ageing contribute to spontaneous autopolyploidy in white sturgeon culture (Acipenser transmontanus) [PDF]
, 2020 Spontaneous autopolyploidy, a 1.5x increase in genome size resulting from second polar body retention after fertilization, has been documented in cultured sturgeons, with the proportion of spontaneous autopolyploid progeny ranging widely among maternal ...
Conte, FS +6 more
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Viabilidad de polen e irregularidades meióticas en una colección de stevia rebaudiana (Bertoni) Bertoni cultivada en Tucumán, Argentina [PDF]
, 2018 Stevia rebaudiana (Bertoni) Bertoni (2n=2x=22) (Asteraceae family) is a species of economic value due to the presence of steviol glycosides in leaves -mainly stevioside and rebaudioside A- which are non-caloric sugars.
Budeguer, Carlos Jorge +2 more
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Obtaining tetraploid plants of ruzigrass (Brachiaria ruziziensis). [PDF]
, 2015 201
DAVIDE, L. C. +6 more
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Transient Activation of Apomixis in Sexual Neotriploids May Retain Genomically Altered States and Enhance Polyploid Establishment [PDF]
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 cell fusions between ubiquitous (reduced) and rare (unreduced) gametes.
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, 2019 Predicted genetic consequences of asexuality include high intraindividual genetic diversity (i.e., the Meselson effect) and accumulation of deleterious mutations (i.e., Muller’s Ratchet), among others.
Leria, L. +3 more
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Unreduced gamete formation in plants: mechanisms and prospects [PDF]
, 2017 Polyploids, organisms with more than two sets of chromosomes, are widespread in flowering plants, including many important crop species. Increases in ploidy level are believed to arise commonly through the production of gametes that have not had their ...
Brownfield, Lynette, Köhler, Claudia
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Cytology of some Iranian Stipa (Poaceae) species and populations [PDF]
, 2006 Meiotic studies were performed on 16 populations of 13 Stipa species concerning polyploidy level, chiasma frequency and distribution, chromosome association and segregation.
M. Khosravi-Reineh +2 more
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Interspecific hybridization in the genus Hieracium s. str.: evidence for bidirectional gene flow and spontaneous allopolyploidization [PDF]
, 2018 Although reticulation has indisputably played an important role in the evolutionary history of the genus Hieracium s. str. (Asteraceae), convincingly documented cases of recent interspecific hybridization are very rare.
Chrtek, Jindřich +2 more
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Boletín de la Sociedad Argentina de Botánica, 2008 Turnera sidoides es un complejo poliploide (x= 7) de hierbas rizomatosas, perennes y distilas, que incluye cinco subespecies. Debido a la alta frecuencia de poliploides en el complejo, los estudios que se llevan a cabo actualmente están orientados a la ...
Andrea F. Panseri +2 more
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