A5080313506- Plant Diversity and Evolution
- Plant and Fungal Species Descriptions
- Plant Taxonomy and Phylogenetics
- Fern and Epiphyte Biology
- Chromosomal and Genetic Variations
- Plant Pathogens and Resistance
- Plant Pathogens and Fungal Diseases
- Historical and Archaeological Studies
- Plant Disease Resistance and Genetics
- Geology and Paleoclimatology Research
- Plant and animal studies
- Wheat and Barley Genetics and Pathology
- Historical Geography and Cartography
- Geological and Geophysical Studies
- Botany and Plant Ecology Studies
- Climate change and permafrost
- European and International Law Studies
- Indigenous Studies and Ecology
- Pacific and Southeast Asian Studies
- Flowering Plant Growth and Cultivation
- Genetic diversity and population structure
- Geographic Information Systems Studies
- Cross-Border Cooperation and Integration
- Saffron Plant Research Studies
- Arctic and Russian Policy Studies
University of Copenhagen
2015-2024
Institute of Botany of the Slovak Academy of Sciences
2008
Swedish University of Agricultural Sciences
1982-2008
Nordic Laboratory for Luminescence Dating
2008
Aarhus University
1993
Geocenter Denmark
1986-1992
V. B. Sochava Institute of Geography
1986-1992
Royal Agricultural University
1989-1991
Nature Conservation Agency
1988
Geographical Institute
1975-1984
Hordeum vulgare was intercrossed with 26 wild species representing 37 cytotypes. Seed set obtained from all crosses, whereas adult plants (hybrids or haploids) resulted only 22 of the intercytotype combinations (15 species). Crosses were more successful when used as pollen donor rather than female parent. Combinations diploid cytotypes difficult to obtain. In spite good seed set, flowering in three combinations, viz. H. marinum, depressum, and brachyantherum. Haploids resulting chromosome...
The evolution of land flora was an epochal event in the history planet Earth. success plants, and especially flowering colonizing all but most hostile environments required multiple mechanisms adaptation. mainly polysaccharide-based cell walls which are indispensable for water transport structural support, one important adaptations to life on land. Thus, development vasculature is regarded as a seminal wall evolution, impact further refinements diversification compositions architectures...
C-banding patterns of eight cytotypes six Asiatic taxa Hordeum sect. Stenostachys were characterized by (1) the small size most centromeric bands, (2) paucity and generally intercalary bands at secondary constrictions, (3) existence in some conspicuous and, particularly H. brevisubulatum ssp. violaceum, 2x, even large telomeric bands. The variation surpasses that earlier observed genus agrees with other genera. C-band polymorphism was widespread except within plants self-compatible taxa....
In Hordeum marinum two subspecies are recognized, viz. ssp. , 2x and gussoneanum 4x. The tetraploid cytotype has a more eastern distribution in the Mediterranean area than diploids. Crosses meiotic data hybrids revealed that three cytotypes closely related. behaves like true alloploid but evidently very strong diploidizing mechanism, which prevents recombination between genomes. isoenzyme pattern shows differences clinal differentiation marinum.
Giemsa C-banding patterns of the predominantly self-pollinating, annual species Hordeum marinum (2x, 4x) and H. murinum 4x, 6x) showed mostly very small to bands at centromeric telomeric positions, one or both sides nucleolar constrictions, intercalary positions with no preferential disposition. A similar distribution has been observed in other species, suggesting that pattern is basic genus Hordeum. murinum, especially hexaploid cytotype, was distinguished from by having more numerous...
Giemsa C-banding patterns of Hordeum pusillum, H. intercedens, brachyantherum (2x, 4x, 6x), jubatum, arizonicum, and depressum (2x 4x) were rather similar, with mostly small to very bands no preferential disposition. The use did not improve the level identification taxa beyond that reached by chromosome morphology. Widespread banding-pattern polymorphism prevented a reliable homologues among populations based on this character alone. Chromosome length differentiate taxa. ratio...
To man Triticeae is one of the most important tribes in plant kingdom, comprising temperate cereals wheat, barley, rye, triticale and several forages.All ca. 350wild taxa tribe thus constitute a gigantic gene pool to crops.By necessity primary pools have received highest priority collecting, evaluation utilization.However, wild weedy recent years an increased attention, but basic botanical genetical knowledge many groups fragmentary.Even though collecting has been accomplished areas, there...
Chromosome numbers for 38 species of Cryptocoryne are reported, 16 which have not been reported earlier. About 90% the now investigated cytologically. On basis chromosome numbers, morphology, and distribution, it is possible to distinguish some 24 groups within investigated. The represent a heteroploid series based on (secondary) base 10, 11, 14, 15, 17, 18. Evidence given that 2n = 36 more primitive one. Evolution level has most likely gone in direction reduction numbers. Two new species,...
The C-banded karyotypes of the 12 diploid, South American Hordeum taxa, H. stenostachys, chilense, flexuosum, euclaston, comosum, pubiflorum, patagonicum ssp. patagonicum, setifolium, santacrucense, mustersii, and magellanicum, erectifolium, were similar, with four metacentric, one submetacentric, two SAT-chromosome pairs, metacentric pair long submetacentric shorter satellites. banding patterns normally had between 4 very small or bands per chromosome occurring at telomeres centromeres,...
Fourteen species of Cryptocoryne are recognized from Borneo: C. ciliata found throughout tropical Asia, longicauda also in Johore; zonata, grabowskii , and edithiae show distinct affinities to the cordata group Malay peninsula; remaining species, endemic Borneo, do not any special, close relationship with other areas. The synonomy, distribution, chromosome numbers, ecology treated.
Field data are lacking in studies of soil erosion South Greenland and its relationship to processes soil-forming factors. The main soil-controlling factors climate, vegetation other organisms, parent material, relief, time, the influence man. potential for is primarily expressed through balance between factor local conditions point climatic or topographic gradients as controlling agents when if cover collapses. rate dependent upon existing soil, temperature (length growing season), moisture....