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Chebotar G.A.,Ukrainian Academy of Sciences | Motsnyy I.I.,Plant Breeding and Genetics Institute | Chebotar S.V.,Ukrainian Academy of Sciences | Sivolap Y.M.,Ukrainian Academy of Sciences
Cytology and Genetics | Year: 2012

The effects of the Rht8c, Rht-B1b, Rht-B1e, and Rht-D1b genes on wheat height have been investigated. Variations in these effects are significantly modified by the genetic background and year conditions. A combination of the Rht8c, Rht-B1a, Rht-D1b, and Ppd-D1a alleles is the most advantageous for the conditions of southern Ukraine, since it is associated with optimal plant height under contrasting conditions within different years. The genotypes of some varieties were shown to include gene(s) that were unidentifiable by the molecular markers and significantly decreased plant height. © 2012 Allerton Press, Inc. Source

Chebotar G.O.,Ukrainian Academy of Sciences | Chebotar S.V.,Ukrainian Academy of Sciences | Motsnyy I.I.,Plant Breeding and Genetics Institute | Sivolap Y.M.,Ukrainian Academy of Sciences
Cytology and Genetics | Year: 2013

In the south part of Ukraine the haplotype of Rht8c and Ppd-D1 genes is widely distributed among modern bread wheat varieties. During the time of scientific breeding program it has been selected as one of the most important adaptive complexes for plants of this region. The genetic distance between the Rht8 and Ppd-D1 genes was clarified. © 2013 Allerton Press, Inc. Source

Burlov V.,Plant Breeding and Genetics Institute
Helia | Year: 2010

The loss of resistance to broomrape by the majority of domestic and foreign hybrids, that are resistant to the 5 th race of the parasite (E) in the Black Sea and Azov regions of the country indicates that from about 2004-2005 there appeared new (more virulent) races of the parasite (Orobanche cumana Wallr.). Maternal lines of sunflower hybrids have been developed whose stability to a new race of broomrape is controlled by one dominant gene, Org. These lines have a high ability of combination on the main economic grounds. Source

Morgounov A.,CIMMYT P.K. | Ablova I.,Krasnodar Agricultural Research Institute | Babayants O.,Plant Breeding and Genetics Institute | Babayants L.,Plant Breeding and Genetics Institute | And 5 more authors.
Euphytica | Year: 2011

Leaf rust represents the major threat to wheat production in Russia and Ukraine. It has been present for many years and epidemics of the pathogen occur in different regions on both winter and spring wheat. In some regions there is evidence of more frequent epidemics, probably due to higher precipitation as a result of climate change. There is evidence that the virulence of the leaf rust population in Ukraine and European Russia and on winter wheat and spring wheat is similar. The pathogen population structure in Western Siberia is also similar to the European part, although there are some significant differences based on the genes employed in different regions. Ukrainian wheat breeders mostly rely on major resistance genes from wide crosses and have succeeded in developing resistant varieties. The North Caucasus winter wheat breeding programs apply the strategy of deploying varieties with different types of resistance and genes. This approach resulted in decreased leaf rust incidence in the region. Genes Lr23 and Lr19 deployed in spring wheat in the Volga region were rapidly overcome by the pathogen. There are continuing efforts to incorporate resistance from wild species. The first spring wheat leaf rust resistant varieties released in Western Siberia possessed gene LrTR which protected the crop for 10-15 years, but was eventually broken in 2007. Slow rusting is being utilized in several breeding programs in Russia and Ukraine, but has not become a major strategy. © 2010 Springer Science+Business Media B.V. Source

Stratula O.R.,Plant Breeding and Genetics Institute | Kalendar R.N.,National Center for Biotechnology | Sivolap Y.M.,Plant Breeding and Genetics Institute
Cytology and Genetics | Year: 2015

Collections of varieties of spring barley cultivars from Eastern European and Central Asian areas were analyzed by exon-specific PCR (EPIC) for β-amylase genes. The endosperm β-amylase gene (bamy1) was differentiated by the presence of 126 bp MITE insertion into intron 3, which is associated with low activity β-amylase. The findings suggest that a low level of genetic variation for bamy1 gene within climatic zones is associated with individual breeding program for each climatic zone. © 2015, Allerton Press, Inc. Source

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