An important new diploid Avena species discovered on the Canary Islands

1973 ◽  
Vol 51 (4) ◽  
pp. 759-762 ◽  
Author(s):  
B. R. Baum ◽  
T. Rajhathy ◽  
D. R. Sampson
Keyword(s):  
Canary Islands ◽  
Evolutionary Sequence ◽  
Avena Species ◽  
Field Crops ◽  
A Genome

Avena canariensis sp. nov., 2n = 14, is described from the Canary Islands. Its spikelets have non-disarticulating upper florets and bidentate lemmas, suggesting the evolutionary sequence: A, canariensis (2x) → A. magna (4x) → A. sterilis (6x). Hence it is a putative ancestor of the 6x cultivated oats. The karyotype consists of two pairs of satellited chromosomes, four pairs with median and one pair with submedian centromeres, suggesting affinity with the A genome diploid avenas. It was found on a diversity of natural and disturbed sites in the uplands of Fuerteventura, but not as a weed of field crops.

AVENA CANARIENSIS: MORPHOLOGICAL AND ELECTROPHORETIC POLYMORPHISM AND RELATIONSHIP TO THE A. MAGNA–A. MURPHYI COMPLEX AND A. STERILIS

1974 ◽  
Vol 16 (3) ◽  
pp. 677-689 ◽  
Author(s):  
Iris L. Craig ◽  
Beatrice E. Murray ◽  
Tibor Rajhathy
Keyword(s):  
Canary Islands ◽  
Morphological Traits ◽  
Elevation Gradient ◽  
A Genome ◽  
Electrophoretic Polymorphism ◽  
Esterase Patterns

Avena canariensis, a recently discovered oat species from Fuerteventura in the Canary Islands, has distinctive ecotypes, is polymorphic in morphological traits and in protein and esterase patterns forming clinal areas within the elevation gradient on the island. A comparison of leaf esterase patterns with that of other species provides evidence favoring A. canariensis as donor of the A genome in the A. magna–A. murphyi–A. sterilis evolutionary cluster.

LEAF ESTERASE ISOZYMES IN AVENA AND THEIR RELATIONSHIP TO THE GENOMES

1972 ◽  
Vol 14 (3) ◽  
pp. 581-589 ◽  
Author(s):  
Iris L. Craig ◽  
Beatrice E. Murray ◽  
Tibor Rajhathy
Keyword(s):  
Natural Populations ◽  
Disc Electrophoresis ◽  
Cytological Evidence ◽  
Esterase Isozymes ◽  
Avena Species ◽  
High Affinity ◽  
A Genome ◽  
C Genome ◽  
Esterase Patterns

Leaf esterase patterns of natural populations of diploid, tetraploid and hexaploid Avena species were separated by disc electrophoresis. The zymotypes of the A genome diploids A. hirtula, A. strigosa and A. longiglumis differed from the C genome diploids A. pilosa and A. ventricosa. The tetraploids A. barbata, A. magna and A. murphyi had distinctive zymotypes. The A. barbata zymotype resembled the A genome diploids which supports the cytological evidence for homoeology between the genomes. Avena magna and A. murphyi were a combination of the A and C diploid patterns with A. murphyi resembling the C more than the A pattern. The zymotypes of the hexaploids A. sterilis and A. sativa revealed the expected A, C and AC genome ancestry. Band affinity ratings within and between genomic groups agreed with the cytological evidence and cross-compatible relationships, the exception being the C — AC species that have high affinity ratings but are apparently cross-incompatible.

EVOLUTION IN THE GENUS AVENA: INHERITANCE OF DIFFERENT FORMS OF RIBULOSE DIPHOSPHATE CARBOXYLASE

1975 ◽  
Vol 17 (3) ◽  
pp. 337-344 ◽  
Author(s):  
M. W. Steer
Keyword(s):  
Chloroplast Genome ◽  
Species Distribution ◽  
Diploid Species ◽  
Disc Electrophoresis ◽  
The Other ◽  
Avena Species ◽  
A Genome ◽  
C Genome ◽  
Evolutionary Paths ◽  
Ribulose Diphosphate Carboxylase

Disc electrophoresis of ribulose diphosphate carboxylases from Avena species in polyacrylamide gels of varying concentrations reveals the presence of two distinct forms of the enzyme. One migrates faster than the other and is found exclusively in species possessing the A genome. The other is confined to the C genome species (A. pilosa, A. ventricosa, A. clauda). The association of another characteristic of this enzyme (presence of stromacentres in the chloroplasts) with the A genome was reported previously. Observations on the recently described species A. prostrata, A. canariensis, A. damascena, and A. murphyi show that they all possess stromacentres, confirming reports that they all contain the A genome. Examination of amphiploid hybrids (from crosses between various diploid species and A. sativa) has shown that the mobility character is inherited maternally, and is located on the chloroplast genome. All these hybrids have the A genome and all have stromacentres. The results are discussed in the light of recent findings on the structure and synthesis of this enzyme. Consideration of the species distribution of the different forms of carboxylase places certain restrictions on the possible evolutionary paths from diploids to tetraploids and hexaploids.

Establishment of a genome-wide RNAi screen; Identification of novel genes involved in clonal maintenance of ALL

2014 ◽  
Vol 226 (03) ◽  
Author(s):  
F Ponthan ◽  
D Pal ◽  
J Vormoor ◽  
O Heidenreich
Keyword(s):  
Rnai Screen ◽  
Novel Genes ◽  
Genome Wide ◽  
A Genome

Early evidence of plant hunting in the Canary Islands from 1694

1999 ◽  
Vol 26 (2) ◽  
pp. 239-267 ◽  
Author(s):  
JAVIER FRANCISCO-ORTEGA ◽  
ARNOLDO SANTOS-GUERRA
Keyword(s):  
Canary Islands ◽  
Early Evidence

The travels of Carl Bolle to the Cape Verde and the Canary Islands

1991 ◽  
Vol 18 (2) ◽  
pp. 251-254
Author(s):  
SUSANNE SALINGER ◽  
HARRO STREHLOW
Keyword(s):  
Canary Islands ◽  
Cape Verde

Feasibility study for the installation of offshore wind farms in the Canary Islands

2009 ◽  
Vol 1 (07) ◽  
pp. 809-813
Author(s):  
M. Martínez ◽  
A. Pulido ◽  
J. Romero ◽  
N. Angulo ◽  
F. Díaz ◽  
...  
Keyword(s):  
Feasibility Study ◽  
Canary Islands ◽  
Wind Farms ◽  
Offshore Wind ◽  
Offshore Wind Farms
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