Results 81 to 90 of about 3,612 (210)

Erratic Male Meiosis Resulting in 2n Pollen Grain Formation in a 4x Cytotype (2n=28) of Ranunculus laetus Wall. ex Royle

The Scientific World Journal, 2012
Two accessions were studied for male meiosis in Ranunculus laetus from the cold regions of Northwest Himalayas. One accession showed the presence of 14 bivalents at diakinesis and regular segregation of bivalents at anaphase I which lead to normal tetrad
Puneet Kumar, Vijay Kumar Singhal
doaj   +1 more source

Polyploidy as mechanism of speciation in plants [PDF]

, 2014
Poliploidizacija je evolucijski proces u kom se dva genom spajaju u jednu jezgru, ovo predstavlja jednu od najdramatičnijih mutacija. Bez obzira, poliploidija je dobro toleriranu u mnogim grupama eukariota.
Sesartić, Marko
core   +2 more sources

The polyploid continuum and the landscape of polyploid genomic variation

American Journal of Botany, Volume 112, Issue 11, November 2025.
Abstract Polyploid research has traditionally distinguished between autopolyploids and allopolyploids on the basis of evolutionary origins, modes of inheritance, or chromosomal pairing behavior during meiosis. It has long been recognized, however, that a binary classification does not accurately reflect the complexity and diversity inherent to ...
Alex D. Twyford, Justin L. Conover, Jeff J. Doyle, Annaliese S. Mason, Douglas E. Soltis, Pamela S. Soltis, Jonathan F. Wendel   +6 more
wiley   +1 more source

The evolutionary significance of polyploidy [PDF]

, 2017
Polyploidy, or the duplication of entire genomes, has been observed in prokaryotic and eukaryotic organisms, and in somatic and germ cells. The consequences of polyploidization are complex and variable, and they differ greatly between systems (clonal or ...
A Amores, A Hoshino, A Kaya, A Madlung, A Rode, A Salman-Minkov, AA Myburg, AC Gerstein, AH Yona, AJ Poustka, AM Diallo, AM Selmecki, AM Session, AR Leitch, AS Mason, AV Borodkina, AV Markov, AY Kuznetsova, BA Edgar, BC Husband, BD Marchant, BK Mable, BK Mable, BP Oswald, BR Mardin, BR Ruhfel, C Berthelot, C Lange, C Parisod, C Parisod, CB Foster, CH Huang, CM Caldwell, D Dikovskaya, D Vekemans, DC Tank, DE Soltis, DE Soltis, DE Soltis, DE Soltis, DE Soltis, DE Soltis, DG Bock, DJ Gordon, DY Chao, E Pierazzo, E van den Bergh, EA Kellogg, EC de Bruin, EH Cho, EJ Edwards, ES Sollars, Eshchar Mizrachi, EW McCarthy, EW McCarthy, F Vergara, FM Robertson, G Hu, GC Conant, GC Conant, GL Stebbins, H Visscher, H Zhang, I Mayrose, I Mayrose, IA Hurley, J Cai, J Coward, J Ramsey, J Ramsey, J Soppa, J Soppa, JA Birchler, JA Fawcett, JE Barrick, JE Bowers, JF Schmitz, JJ Doyle, JL Olsen, JM Kreiner, JP Gallagher, JS Taylor, JT Clarke, JV Bredeson, K Bomblies, K Gross, K Tanaka, K Vanneste, K Vanneste, K Vanneste, K Voordeckers, KA Segraves, Kathleen Marchal, KC Oberlander, KD Crow, KH Wolfe, KL Glennon, KP Schoenfelder, L Comai, L De Veylder, L Lv, L Yant, L Yant, LA Meyers, LM Corrochano, M Ceccarelli, M Freeling, M Freeling, M Iorizzo, M Ruiz, M te Beest, M Wille, MA Campbell, MA Hahn, MC Estep, ME Schranz, MJ Yoo, MK Pandit, ML Ainouche, MS Barker, MS Barker, MS Barker, N Arrigo, N De Storme, NJ Kenny, NL Fowler, P Dehal, PM Yang, PP Edger, PP Singh, PP Singh, PR Renne, PS Soltis, PS Soltis, PS Soltis, Q Song, R De Smet, R Lohaus, R Ming, RF Furlong, RJ Hijmans, S Breuert, S Kagale, S Lien, S Maere, S Magallon, S Ohno, S Santaguida, S Theodoridis, SB Cannon, SK Maciver, SM Dewhurst, SM Hovick, SP Otto, SV Petersen, SV Scarpino, T Davoli, T Fujiwara, T Makino, TE Wood, TL Orr-Weaver, UC Lavania, V Pecoraro, W Zhou, WM Kurschner, X Shi, Y Jiao, Y Nakatani, Y Pecrix, Y Van de Peer, Y Van de Peer, Y Van de Peer, Y Yu, Yves Van de Peer, Z Fang, Z Li, Z Li   +176 more
core   +1 more source

Squamate ventricular cardiomyocytes: Ploidy, proliferation, and heart muscle cell size in the leopard gecko (Eublepharis macularius)

Developmental Dynamics, Volume 254, Issue 11, Page 1203-1220, November 2025.
Abstract Background While heart function is broadly conserved across vertebrates, the cellular phenotype of muscle cells (cardiomyocytes) varies across taxa and throughout ontogeny. Emerging evidence suggests that some attributes may correlate with the capacity for spontaneous cardiomyocyte replacement following injury.
Kathy Jacyniak, Karemna Barrera Jaimes, Minh Hanh Doan, Jordyn M. Chartrand, Matthew K. Vickaryous   +4 more
wiley   +1 more source

Asymmetric reproductive interference: The consequences of cross‐pollination on reproductive success in sexual–apomictic populations of Potentilla puberula (Rosaceae)

Ecology and Evolution, 2018
Apomixis evolves from a sexual background and usually is linked to polyploidization. Pseudogamous gametophytic apomicts, which require a fertilization to initiate seed development, of various ploidy levels frequently co‐occur with their lower‐ploid ...
Christoph Dobeš, Susanne Scheffknecht, Yulia Fenko, Dagmar Prohaska, Christina Sykora, Karl Hülber   +5 more
doaj   +1 more source

Unraveling Evolution in the Homoploid Complex of Baccharis L. in Chile

Ecology and Evolution, Volume 15, Issue 10, October 2025.
Genotyping‐by‐Sequencing (GBS) was used to characterize hybrids originating from the species B. macraei and B. linearis and identifying the substructure of the hybrid complex. ABSTRACT Baccharis × intermedia (Asteraceae), found in central Chile, is a naturally occurring hybrid derived from the parent species B. macraei and B. linearis. It represents an
Fabian Schneider, Olga Zafra‐Delgado, Tobias G. Köllner, Frank Hellwig   +3 more
wiley   +1 more source

Rediscovery of the Enigmatic Paroxygraphis in Xizang, China: Phylogenetic Evidence for Its Reclassification Within Oxygraphis (Ranunculaceae)

Ecology and Evolution, Volume 15, Issue 10, October 2025.
This study resolves the long‐standing taxonomic ambiguity of the genus Paroxygraphis through comprehensive molecular phylogenetic analysis, demonstrating its nested position within the Oxygraphis clade. Based on robust phylogenetic evidence, alongside morphological and ecological similarities, we propose the reclassification of Paroxygraphis ...
Wen‐He Li, Wan‐Ting Chen, Bo‐Wen Liu, Jia‐Min Xiao, Huan‐Yu Wu, Jian He, Lei Xie   +6 more
wiley   +1 more source

Reticulate evolution in stick insects: the case of Clonopsis (Insecta Phasmida) [PDF]

, 2010
Background Phasmids show noteworthy abilities to overcome species-specific reproductive isolation mechanisms, including hybridization, polyploidy, parthenogenesis, hybridogenesis and androgenesis. From an evolutionary standpoint, such tangled
Liliana Milani, Fabrizio Ghiselli, Marco Pellecchia, Valerio Scali, Marco Passamonti   +4 more
core   +2 more sources

Critical Evaluation of Methods for the Identification of Aneugens

Environmental and Molecular Mutagenesis, Volume 66, Issue 8, Page 412-424, October 2025.
ABSTRACT The genotoxic potential of chemicals must be evaluated in regulatory safety assessment settings, including but not limited to, the development of new pharmaceuticals, industrial chemicals, food and cosmetic ingredients, and agrochemicals. Initial assessment of the chromosome‐damaging potential of chemicals is often conducted in mammalian cells
Xiaowen Sun, Stephen D. Dertinger, Azeddine Elhajouji, Daniel J. Roberts, Jan van Benthem, Maik Schuler, Shambhu Roy, Alexandra Taraboletti, Connie L. Chen   +8 more
wiley   +1 more source