Results 31 to 40 of about 2,997 (195)
Pathways to polyploidy : indications of a female triploid bridge in the alpine species Ranunculus kuepferi (Ranunculaceae) [PDF]
, 2017 Polyploidy is one of the most important evolutionary processes in plants. In natural populations, polyploids usually emerge from unreduced gametes which either fuse with reduced ones, resulting in triploid offspring (triploid bridge), or with other ...
De Storme, Nico +5 more
core +2 more sources
Comparative Cytogenetics, 2017 Plantago lagopus is a diploid (2n = 2x =12) weed belonging to family Plantaginaceae. We reported a novel B chromosome in this species composed of 5S and 45S ribosomal DNA and other repetitive elements. In the present work, presence of B chromosome(s) was
Manoj K. Dhar +2 more
doaj +3 more sources
Caryologia, 2023 . Foeniculum vulgare Mill. (2n=22) is an herbaceous species native to the Mediterranean region and naturalized in many temperate areas around the world. It includes subsp. piperitum and subsp.
Egizia Falistocco
doaj +1 more source
Evidence That 2n Eggs Explain Partial Hybrids between Medicago sativa and Medicago arborea
Plants, 2022 Selected genotypes of alfalfa (Medicago sativa) produce partial hybrids in sexual crosses with Medicago arborea, as reported in Plants (2013). The hybrids contain mostly alfalfa DNA and traits, but also contain DNA and traits from M. arborea.
Edwin Bingham, John Irwin
doaj +1 more source
Temporal and spatial expression of genes involved in DNA methylation during reproductive development of sexual and apomictic Eragrostis curvula [PDF]
, 2017 Recent reports in model plant species have highlighted a role for DNA methylation pathways in the regulation of the somatic-to-reproductive transition in the ovule, suggesting that apomixis (asexual reproduction through seeds) likely relies on RdDM ...
Echenique, Carmen Viviana +9 more
core +1 more source
Frontiers in Plant Science, 2019 Apomixis (asexual seed formation) in angiosperms occurs either sporophytically, through adventitious embryony, or gametophytically, where an unreduced female gametophyte (embryo sac) forms and produces an unreduced egg that develops into an embryo ...
John G. Carman +15 more
doaj +1 more source
Genomic and Meiotic Changes Accompanying Polyploidization
Plants, 2022 Hybridization and polyploidy have been considered as significant evolutionary forces in adaptation and speciation, especially among plants. Interspecific gene flow generates novel genetic variants adaptable to different environments, but it is also a ...
Francesco Blasio +3 more
doaj +1 more source
Does hybridization between divergent progenitors drive whole-genome duplication? [PDF]
, 2009 This is the peer reviewed version of the following article: BUGGS, R. J. A., SOLTIS, P. S. and SOLTIS, D. E. (2009), Does hybridization between divergent progenitors drive whole-genome duplication?.
Buggs, RJA, Soltis, DE, Soltis, PS
core +1 more source
Meiocyte size is a determining factor for unreduced gamete formation in Arabidopsis thaliana
New Phytologist, 2022 Summary Polyploidy, the presence of more than two sets of chromosomes within a cell, is a widespread phenomenon in plants. The main route to polyploidy is considered through the production of unreduced gametes that are formed as a consequence of meiotic defects.
Jun Yi +6 more
openaire +4 more sources
Triploid cultivars of Cymbidium act as a bridge in the formation of polyploid plants
Frontiers in Plant Science, 2022 Triploid is considered a reproductive barrier and also a bridge in the formation of polyploids. However, few reports are available in Cymbidium. In this study, diploid ‘Xiaofeng’, sexual triploid ‘Yuchan’ and ‘Huanghe’ of Cymbidium were used to evaluate ...
Man-Man Li +8 more
doaj +1 more source