Name
Repko Nataliya Valentinovna
Scholastic degree
•
Academic rank
associated professor
Honorary rank
—
Organization, job position
Kuban State Agrarian University
Web site url
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Articles count: 24
The article brings the results of three-year studies of the
influence of the periods of sowing on productivity of
new varieties and lines of winter barley
The review examines the recent years’ data
pertaining to the interaction of plants with
nanoparticles of noble metals (gold and silver) and
with nanoparticles of magnesium as an element that
has a central role in the organization of the cellular
protein-synthesizing apparatus. Information is
presented about the effect of gold and silver
nanoparticles on plants and on possible nanoparticle
phytotoxicity. It is shown that magnesium
nanoparticles, as well as those of noble metals,
produce various effects on the growth and
productivity of plants, enabling the arsenal of
biologically active substances to be expanded.
Analysis is made of the involvement of magnesium
nanoparticles in cryobiological reaction of the
regular breakdown of plant RNA under conditions of ultra low temperatures, which is important not
only for the further developments of views of the
origin of life ob Earth but also for the purposes of
designing new markers for the analysis of the
biological peculiarities of agricultural crops on the
basis of studies of magnesium in the long-lived
RNA of their mature seeds. The presented critical
analysis of the literature data, which are often
incomplete and contradictory, suggest that a
coordinated research program is needed that would
detect correlation between particle parameters,
experimental design, and observed biological
effects
Lodging resistant is a very important factor of limitation of the yield of barley. The yield of lodged crops may be decreased up to 50%. The quality of the yield also deteriorates which negatively affects brewery characteristics. The lodging resistance of a variety is determined genetically and depends on a plant height and weather conditions during dynamic vegetation. One of the main aims of breeding of the crop for lodging resistance is the selection of short-stem varieties. However, a thorough study of the basic material and determination of its adaptability to a particular soil and climatic zone and suitability of its usage as parental forms are needed. The article covers the plant height of collection varieties of winter barley in the central zone of Krasnodar region and determines the groups of the varieties based on this trait. The dynamic of plant height formation depending on the vegetative conditions during five years is studied. The examination of lodging resistance of winter barley revealed that there are many non-lodging forms of the crop. New local varieties and lines have short and strong culms. Also, some varieties from Western Europe and the USA show its good lodging resistance under these conditions
Barley (hordeum vulgare) is a valuable food and
forage crop. It is cultivated in the world on an area
of about 60 million hectares. A major region of
barley cultivation in the Russian Federation is the
Southern Federal District. The variety is one of the
main factors determining the demand for crop. To
use the varieties effectively we must have a
complex of economically valuable traits such as
hardiness, resistance to lodging, disease and pest
resistance. These traits make it possible to generate
the harvest high and stable from year to year. The
article is devoted to the analysis of winter barley
varieties, created in the south of Russia from
ancient times to the present day. The main
achievements of the leading Russian breeding
facilities and experienced breeders of scientists set
out in chronological order. The article describes the
methods and principles of selection (from
individual selection to mutagenesis and complex
selective breeding) used to breeding the new
varieties of winter barley. The most attention is
given to the outstanding varieties included to the
mating program today
The problem of increasing resistance of winter
barley to adverse conditions of winter is the most
problem in the selection area of this crop. The main
component of this complex trait is the frost
resistance. Laboratory methods of assessment of
frost resistance are important for breeding of winter
barley. These methods can effectively replace more
costly method of direct freezing in the freezers.
Magnesium cations (Mg++) are essential
components of the protein-synthesizing system of
germinating seeds. Magnesium cations determine
the stability and translational activity of mRNA and
rRNA. Trilon B is usually used for in vitro banding
of magnesium cations in area of biochemistry of the
nucleic acids. It was very interesting to verify the
Trilon B influence to seed germination of winter
barley varieties by experiment. Experiments
showed: actinomycin D – the inhibitor of RNA
synthesis – didn’t show varieties specific effect to
seed growth of winter barley, while Trilon B had a
varieties specific impact to length coleoptiles and
roots. Research was carried out on etiolated
seedlings at temperatures from 22 to 28oC, and different concentrations of Trilon B - 1,6×10-3Ðœ,
2,4×10-3Ðœ and 3,2×10-3Ðœ. The roots of 3-days old
seedlings were more sensitive to Trilon B influence.
It is shown the varieties of Russian origin were
naturally reacted to Trilon B: the higher the frost
resistance of variety, the more resistant variety to
the action of various concentrations of Trilon B at
different temperatures. The most optimum
concentration was 3,2 × 10-3Ðœ at 22-25oC.
Varieties by foreign origin deviated from this
pattern. It is interesting to research the genetic
essence of these differences. It will be helpful for
optimization of varieties differentiation conditions
to create a laboratory method of estimate of frost
resistance of winter barley. The new method will be
most efficient compared the direct freezing method
The article presents an analysis of the statistical data on use of barley in the world agriculture. The dynamics of changes in acreage under crop has been studied over the past decade in the global community. The structure of indicators in barley’s area was reduced and the main regions of production have been described. As the world as some countries barley productivity was studied. The article presents the data on world production of barley for lust four years. The structure of production of the main producing counties for 2014 is presented graphically. On the basis of the material revealed, more than half of the total harvest of barley in the world has been produced by three regions: The European Union, the Russian Federation and Canada. The article presents a comparative analysis in the above productivity of barley by the world leaders in the production of this crop. A direct influence of environmental factors on final grain yield has noted. Also the issue of national economic importance of culture has been revealed. We have noted the areas of the culture use such as food, brewing industry, as well as livestock (as it is known, barley is one of the most valuable forage crops)
The article presents the data of the yield of winter barley varieties various breeding institutions in conditions of the South zone of the Krasnodar region, as well as the analysis of selected indicators of yield structure elements
Due to the wide spread of winter barley varieties with
different Phytopathologic characteristics, a serious
threat to the crop is dwarf rust caused by a pathogenic
fungi of the Puccinia. The article presents the results of
phytosanitary studies conducted in different agroclimatic
zones of the North Caucasus region for the
period from 2013 to 2015. Electronic maps of levels of
development and distribution of dwarf rust are based on
phytosanitary inspection. On the experimental field
called «Kuban» as well as rust nursery of VNIIBZR we
have performed an immunological evaluation of the
sustainability of winter barley accessions to the
pathogen of the dwarf rust on natural and artificial
infectious backgrounds in the period from 2013 to
2015. The article reflects the objective characteristics of
varieties and lines of winter barley with a relative
stability to the North Caucasian population Puccinia
hordei. The most promising varieties and lines of winter
barley of the KubGAU breeding were selected during
operation. These varieties and lines are highly resistant
to rust and dwarf, they also have other valuable
features. The article presents information on the best
yield varieties and lines of winter barley as well as on
gross yield and sowing area