Results 211 to 220 of about 17,851 (240)

Diversity and evolution of the Hordeum murinum polyploid complex in Algeria

Genome, 2011
Population diversity and evolutionary relationships in the Hordeum murinum L. polyploid complex were explored in contrasted bioclimatic conditions from Algeria. A multidisciplinary approach based on morphological, cytogenetic, and molecular data was conducted on a large population sampling. Distribution of diploids (subsp.
Ourari, Malika, Aïnouche, Abdelkader, Coriton, Olivier, Huteau, Virginie, Brown, Spencer, Misset, Marie-Thérèse, Aïnouche, Malika L., Amirouche, Rachid   +7 more
openaire   +4 more sources

Flavonoid variation in Arnica cordifolia: an Apomictic polyploid Complex

Biochemical Systematics and Ecology, 1983
Abstract Thirty-three populations of A. cordifolia , a wide-ranging apomictic polyploid complex, were examined for flavonoid content. A total of ten compounds, including simple and methylated flavone and flavonol glycosides as well as methylated aglycones, were isolated and identified.
Steven J. Wolf, Keith E. Denford
openaire   +1 more source

Genetic control of bivalent pairing in the Avena strigosa polyploid complex

Chromosoma, 1973
Bivalent pairing in the tetraploid oat A. barbata, the main tetraploid form of A. strigosa polyploid complex, was found to be determined by a single recessive gene in quadriplex condition. This gene segregated in tetrasomic fashion in the A. barbata × A. strigosa autopolyploid, which indicates conspicuously autopolyploid origin of A.
openaire   +2 more sources

Cytogeography and taxonomy of the Paeonia obovata polyploid complex (Paeoniaceae)

Plant Systematics and Evolution, 2001
The taxonomy of the Paeonia obovata polyploid complex in E-Asia has been controversial with treatments ranging from one species and two varieties to five species and numerous infraspecific taxa. Extensive observations in the field, analysis of morphological characters based on 32 populations sampled, and the examination of a large amount of herbarium ...
D.-Y. Hong, K.-Y. Pan, G.-Y. Rao
openaire   +1 more source

Multivariate Analysis of the Polyploid Complex Valeriana Officinalis

1983
Valeriana officinalis sens.lat. is an extremely polymorphous aggregate of diploid, tetraploid and octoploid races, distributed over the temperate and the subpolar zone of Eurasia. Morphological, cytological, geographic and ecological differentiation in this group has been recently surveyed by Titz and Titz (1982).
openaire   +1 more source

The distribution of diploids and polyploids of the Scilla scilloides complex in Korea

Genetica, 1985
A total of 3 384 individuals of Scilla scilloides Druce were sampled from 40 natural populations at 35 different localities over the Korean Peninsula and analysed cytogenetically. The following cytogenetic types were found: AA (19.6%), AABB (72.4%), ABBB (4.3%), AABBB (3.0%) and aneuploids (0.8%).
openaire   +1 more source

THE ROLE OF POLYPLOID COMPLEXES IN THE EVOLUTION OF NORTH AMERICAN GRASSLANDS

TAXON, 1975
SummaryThe evolutionary history of the grass flora of the Great Plains of North America is interpreted on the basis of the probable origin and development of eight different polyploid complexes that include common species of this flora. The related complexes of Bouteloua and Buchloc have their centers of distribution in the southwestern United States ...
openaire   +1 more source

The potential for introgression in a British polyploid complex

1985
The potential for introgression in the British Senecio polyploid complex was investigated using numerical taxonomic methods. It has been suggested that introgression of the introduced Mediterranean diploid S. squalidus L. into the native British tetraploid species S. vulgaris var.
openaire   +1 more source

Interploid reproductive isolation in the Campanula rotundifolia polyploid complex

2017
Polyploidy, or whole-genome duplication, has long been considered an important factor in plant speciation due to the tendency of newly formed polyploids to be reproductively isolated from their diploid progenitors. Recent evidence has called into question both the incidence of polyploidy-induced reproductive isolation, particularly among higher ploidy ...
openaire   +1 more source

Polyploid structure in the Setaria sphacelata complex

Australian Journal of Botany, 1968
Meiotic behaviour and fertility were studied in hybrids between tetraploid, hexaploid, octaploid, and decaploid strains in the Setaria sphacelata complex, the strains studied including S. sphacelata sensu stricto, S. sphacelata var. stoloniferaS. anceps, and S. trinervia. Metaphase and telophase data in 5x (4x × 6x), 7x (6x × 8x), 9x (8x × 10x), 6x (4x
openaire   +1 more source