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Samara Oblast, Russia

Five new species, Petrobius caucasicus sp. n., Trigoniophthalmus presimplex sp. n., T. divnogorski sp. n., T. kislovodski sp. n., and T. adigei sp. n. (Machilidae), are described from the Caucasus. A key to the identification of all known species of the genus Trigoniophthalmus is given. Two subgenera (Trigoniophthalmus s. str., Trigoniocellus subgen. n.) in the genus Trigoniophthalmus are described. 2 + 2 eversible vesicles are located on II-IV abdominal segments in the species of Trigoniocellus subgen. n. and on II-V abdominal segments in Trigoniophthalmus s. str. The analysis of evolution and phylogenetic relations between species of the genus Trigoniophthalmus is given for the first time. The formation of bristletails of the genus Trigoniophthalmus appears to occur in the Caucasian mountain province of the European area, from where they penetrated to the Central European mixed province and the Mediterranean subarea. Among the described species of the genus, T. kislovodski is distinguished by the greatest number of plesiomorphous states of morphological features. Source

Chipilski R.R.,Agricultural Academy | Chipilski R.R.,Bulgarian Academy of Science | Kocheva K.V.,Bulgarian Academy of Science | Nenova V.R.,Bulgarian Academy of Science | Georgiev G.I.,Bulgarian Academy of Science
Zeitschrift fur Naturforschung - Section C Journal of Biosciences | Year: 2012

Young plants of the two wheat cultivars Katya and Prelom, differing in their reaction to drought in the field, were grown in soil in pots, and their water status was assessed as well as the intensity of gas exchange, chlorophyll fluorescence, and accumulation of compatible solutes and hydrogen peroxide after 7 days of dehydration. It was established that cv. Katya displayed markedly better tolerance to soil drying in comparison with cv. Prelom. This was partly due to the more effective control of water balance, activity of the photosynthetic apparatus, and metabolic activity of leaves under stress. Consequently, lower amounts of hydrogen peroxide were accumulated and a lower membrane injury index was determined. © 2012 Verlag der Zeitschrift für Naturforschung, Tübingen. Source

Hristov P.I.,Bulgarian Academy of Science | Teofanova D.R.,Bulgarian Academy of Science | Mehandzhiyski I.D.,Agricultural Academy | Zagorchev L.I.,Sofia University | Radoslavov G.A.,Bulgarian Academy of Science
Biotechnology and Biotechnological Equipment | Year: 2013

The aim of the present research was to reveal the genotype profile of the local Bulgarian Rhodopean cattle population with respect to αs1-casein, kappa-casein and β-lactoglobulin genes, by PCR-RFLP assay and conformational 2D PAGE. According to these profiles, it is possible to determine the association between each genotype and milk qualitative and quantitative traits and to establish the position of the breed with regard to the genetic diversity other European cattle breeds. The investigation also revealed the high significance of the genetic variants of the three above-mentioned milk protein genes for: Clarification of the influence of other breeds on the Bulgarian Rhodopean cattle population; Obtaining data for genetic drift among the Bulgarian Rhodopean cattle population, the indigenous Shorthorn Rhodopean cattle population as a predecessor breed and the Jersey cow as a main improvement breed; Gathering the necessary information about preservation of this local breed, which is important for the Bulgarian biodiversity gene fund. Source

Hristov P.,Bulgarian Academy of Science | Teofanova D.,Bulgarian Academy of Science | Mehandzhiyski I.,Agricultural Academy | Yoveva A.,Bulgarian Academy of Science | Radoslavov G.,Bulgarian Academy of Science
Biotechnology and Biotechnological Equipment | Year: 2012

Shorthorn Rhodopean cattle breed is one of two endemic for Bulgaria cow breeds. The breed is characterized by high vitality and fertility, calving ease, resistance to diseases, and low requirements for feed. Milk yield is low, but fat and protein content of milk are high. Therefore it is of high significance to reveal the genotype profile of that cattle population which represents the aim of present study. 38 animals of that breed were genotyped for two lactoprotein genes: kappa-casein and alfaS1-casein through PCR-RFLP analysis. The results for kappacasein locus show slight superiority of heterozygous AB genotype and prevalence of uncommon B allele. Analysis of polymorphism of alfaS1-casein gene displays that about 53% of the animals are with homozygous BB genotype, about 34% - with heterozygous BC genotype and only ~13% (5 cows) – with homozygous CC genotype. It may be concluded that Shorthorn rhodopean cow breed is with specific genotype profile similar to other cattle population in South-Eastern Europe. © 2012 Taylor and Francis Group, LLC. Source

Ivanov M.,Agricultural Academy | Roychev V.,Agricultural University of Plovdiv
Bulgarian Journal of Agricultural Science | Year: 2016

Research has been carried out into the characteristics of the inheritance of the trait berry colouring in vine seedlings from F1 progeny of complex interspecies hybrid combinations. It has been found that the cultivars used in the separate crosses are characterized by different genotypes in terms of the studied trait, which leads to the observed great phenotypic diversity. The inheritance of berry colour takes place by monohybrid - dominant and incompletely dominant and dihybrid - epistatic scheme. The genetic analysis and determination of the individual genotype of parent cultivars related to that qualitative trait, present a theoretical possibility for increasing the efficiency of the selection process in vine in accordance with the concrete objective. © 2016, National Centre for Agrarian Sciences. All rights reserved. Source

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