Results 91 to 100 of about 20,845 (229)

Origin of subgenomes in the circumboreal, allopolyploid, carnivorous plant Drosera anglica

open access: yesAmerican Journal of Botany, Volume 113, Issue 3, March 2026.
Abstract Premise The parentage of the widespread allopolyploid Drosera anglica, a member of the carnivorous sundew genus, remains uncertain despite over 100 years of morphological, cytological, and, more recently, molecular study. Methods Using transcriptomic and genomic data from 12 species of Drosera sect. Drosera, including four D.
Rebekah A. Mohn, Ya Yang
wiley   +1 more source

Número cromossômico, análise meiótica e estimativa da viabilidade polínica em populações de Hyptis mutabilis (Rich.) Briq. Number of chromosomes, microsporogenesis and pollen viability in populations of Hyptis mutabilis (Rich.) Briq.

open access: yesRevista Brasileira de Plantas Medicinais, 2009
Hyptis mutabilis é uma espécie medicinal da família Lamiaceae que possui importante valor fitoterápico. Não há registros sobre estudos cromossômicos e comportamento meiótico nessa espécie em populações na região sul do Brasil.
J.M. Fachinetto, S.B. Tedesco
doaj   +1 more source

Apomixis in Genista salzmannii DC. (Fabaceae) [PDF]

open access: yes, 1991
Genista apomixis is described for the first time in two populations of Genista salzmannii DC.: the first is diploid and the second one tetraploid. There was no female meiosis and the megaspore mother cell functioned as an unreduced megaspore, which led ...
Diana, Silvana   +1 more
core  

New Zealand Geological Timescale 2025

open access: yesNew Zealand Journal of Geology and Geophysics, Volume 69, Issue 1, March 2026.
New Zealand Geological Timescale 2025 (NZGT 2025) is the first comprehensive update and revision of the New Zealand Geological Timescale in a decade. The criteria used to establish age ranges of New Zealand Stages within the NZGT have been reviewed, calibrated, and revised where required against the 2023/04 International Chronostratigraphic Chart and ...
Christopher D. Clowes   +13 more
wiley   +1 more source

Sexual Polyploidization in Medicago sativa L.: Impact on the Phenotype, Gene Transcription, and Genome Methylation

open access: yesG3: Genes, Genomes, Genetics, 2016
Polyploidization as the consequence of 2n gamete formation is a prominent mechanism in plant evolution. Studying its effects on the genome, and on genome expression, has both basic and applied interest.
Daniele Rosellini   +10 more
doaj   +1 more source

The Biology of Canadian Weeds. 131. \u3cem\u3ePolygonum aviculare\u3c/em\u3e L. [PDF]

open access: yes, 2005
A review and assessment of biological information as well as personal data are provided for Polygonum aviculare in Canada. The species has been revised taxonomically and the six subspecies that occur in Canada are presented.
Costea, Mihai, Tardif, François J.
core   +1 more source

Preliminary Palynostratigraphic Age Assessment of Victoria and Ferrar Group Deposits in the Central Prince Albert Mountains, Victoria Land, East Antarctica

open access: yesNew Zealand Journal of Geology and Geophysics, Volume 69, Issue 1, March 2026.
Composition and age span of sedimentary deposits of the Transantarctic Basin system vary between different regions of the Transantarctic Mountains. Moreover, whereas the regional stratigraphic successions have been very well established in some areas of East Antarctica, such as the Allan Hills or the Beardmore Glacier, they remain virtually unexplored ...
Valentina Corti   +4 more
wiley   +1 more source

Cytomorphological investigations in wide cross of Arachis involving Arachis hypogaea and an amphidiploid (Arachis correntina x Arachis helodes) [PDF]

open access: yesElectronic Journal of Plant Breeding, 2014
Inter-specific cross of Arachis hypogaea (2n=4x=40) and Arachis correntina x Arachis helodes (2n=2x=20) yielded the unstable triploid and sterile derivatives.
S. Saravanan*, M. Jayaramachandran and R. Vaidyanathan
doaj  

Cytogenetic study of the genus Cousinia (Asteraceae, section Serratuloideae) in Iran

open access: yesGenetics and Molecular Biology, 2006
Meiotic studies of ploidy level, chromosome paring and chiasma frequency were performed on 11 Cousinia (Asteraceae) species of the section Serratuloideae.
Masoud Sheidai   +3 more
doaj   +1 more source

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