20 research outputs found
Genetic analysis of the naked trait in panicles of hexaploid oat
The aim of this study was to estimate the number of genes that control the naked (hull-less) trait and the mode of expression
of this characteristic in panicles of hexaploid white oat. Parents and the segregating population (in the F2
and F3
generations) were
evaluated in regard to the presence and distribution of naked grains in panicles of individual oat plants. For each plant, a drawing
of the main panicle was developed. From the drawings obtained in the progenies of the F2
population, six distinct phenotypic classes
were produced. The expected phenotypic proportion of 3:9:4 (naked:segregating:hulled) was that which best fit by the Chi-square test.
In the F3
generation, the results showed agreement with the hypothesis observed in the F2
generation. The naked trait in oat is passed
on by two genes and the greatest expression of this trait occurs in the upper third of the panicles. Expression of this trait in oats is not
complete, even in homozygous genotypes
Genetics and identification of markers linked to multiflorous spikelet in hexaploid oat
The formation of naked grains is directly associated with the formation of multiflorous spikelets in oats. The objectives of
this study were to determine the genetics of multiflorous spikelet and to identify molecular markers linked to this character in hexaploid oat. Genetic analysis for multiflorous spikelet was performed in the F5 and F6 generations of two oat populations. DNA extracted from F5:6 plants were assayed with 6,000 genome-wide single nucleotide polymorphism (SNP) markers using a genotyping platform developed for oat. Genetic analysis indicated the presence of a major gene controlling multiflorous spikelet in the UFRGS 01B7114-1-3 x UFRGS 006013-1 population. The SNP marker GMI_ES17_c5923_221 showed strong association with the multiflorous spikelet phenotype. These results suggest that the marker GMI_ES17_c5923_221 should be linked to a gene controlling multiflorous spikelet in the oat lines evaluated in this study
Photosynthesis in the basal growing zone of barley leaves
Baier M, Bilger W, Wolf R, Dietz K-J. Photosynthesis in the basal growing zone of barley leaves. Photosynthesis Research. 1996;49(2):169-181