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Krasteva L.,Institute for Plant Genetic Resources | Pandeva R.,Institute of Plant Physiology and Genetics | Rodeva R.,Institute of Plant Physiology and Genetics | Todorova V.,Maritsa Vegetable Crops Research Institute | And 5 more authors.
Acta Horticulturae | Year: 2012

Pepper (Capsicum annuum var. annuum L.) is one of the most important and wide spread vegetables in the Balkan region. A great number of local populations with specific characteristics for shape, color, taste, biological value and type of use are grown in different Balkan countries together with the main commercial cultivars. Partially the old native forms are not within attention of the sort maintenance selection, but they are preserved in limited area and are valuable genetic resources. A SEE-ERA.NET project started in 2010 setting the task to investigate pepper as target species. The strategic objectives are: i) to collect, describe and explore the existing Capsicum biodiversity in the partner countries (Albania, Bulgaria, Greece, Macedonia and Serbia) related to valuable traits; ii) to create work and basic collections of local accessions and the respective database for more detailed and profound future collaborative investigations and breeding programs. Methods for description and maintenance of the collected material have been standardized in order to create a uniform description of existing local germplasm of pepper. First joint collecting expeditions have been carried out. Local expedition trips for expanding the national collections of old cultivars and domestic landraces have also been organized. Preparation of work and basic collections in the National Seed Genebank, Sadovo, Bulgaria, has started. The data will be publicly launched in the European Search Catalogue for Genetic Resources, EURISCO (www.eurisco.ecpgr.org). The data generated from this study, knowledge and collections will serve as a solid basis for effective preservation, management and exploitation of Balkan pepper germplasm biodiversity. The discovery of new sources of genetic variation and identification of accessions with valuable traits as pest resistance will be used in future pepper-breeding programs.

Rodeva R.,Institute of Plant Physiology and Genetics | Kostova D.,Maritsa Vegetable Crops Research Institute | Chavdarov P.,Institute for Plant Genetic Resources | Mijatovic M.,Serbian Institute for Vegetable Crops | And 9 more authors.
Acta Horticulturae | Year: 2012

One of the most important problems affecting pepper production in the Balkan peninsula is the occurrence of common pathogens causing severe diseases and epidemics resulting in reduced and compromised yield. Phytophthora capsici, Botrytis cinerea, Sclerotinia sclerotiorum, Verticillium dahliae, Fusarium spp., Pseudomonas syringae pv. syringae, Xanthomonas vesicatoria, Pepper mild mottle virus (PMMV), Tobacco mosaic virus (TMV), Cucumber mosaic virus (CMV), Tomato spotted wilt virus (TSWV), Alfalfa mosaic virus (AMV), Potato virus Y (PVY) etc. are among the most devastating and widely distributed pathogens. This region is also characterized with endemic, emerging or newly introduced pathogens threatening pepper production. In the last years new pepper fungal pathogens (Phomopsis capsici and several Colletotrichum spp.) were found in Bulgaria with increasingly frequency. In 2010 a SEE-ERA.NET project started combining the research efforts of seven scientific institutions from five Balkan countries (Albania, Bulgaria, Greece, Macedonia and Serbia). The strategic objectives of the project are: i) to explore Balkan biodiversity of Capsicum spp. in order to extract biotic stress resistant germplasm; ii) to update knowledge about the most economically important and emerging pathogens on Capsicum in the Balkan region and to form pathogen collection; iii) to develop database, concerning the pepper pathogen occurrence in the mentioned regions; iv) to identify areas at differing pathogen risk in the involved Balkan countries and to define risks related to introduction of new pathogen biotypes by trading. Adequate knowledge for pathogens is essential for the management of the diseases, caused by them and for solving problems in sustainable and conventional agriculture. First joint collecting expeditions have been carried out. Pathogens have been isolated, identified and characterized mainly at species level. Collections have been created and properly preserved in related institutes for further investigations concerning the race and strain specificity of the saved pathogens and host-pathogen interaction.

Kolev T.,Agricultural University of Plovdiv | Tahsin N.,Agricultural University of Plovdiv | Koleva L.,Agricultural University of Plovdiv | Ivanov K.,Agricultural University of Plovdiv | And 3 more authors.
Journal of Central European Agriculture | Year: 2011

A comparative experiment was carried out with five Bulgarian and five foreign durum wheat cultivars. The aim of the experiment was to determine the chemical content and grain technological quality of some Bulgarian and foreign durum wheat cultivars grown under the agriecological conditions of Southern Bulgaria. The Vazhod cultivar proved to give the highest durum wheat grain yield, followed by Beloslava cultivar. Out of the foreign durum wheat cultivars the Durumko was notable for its higher productivity. The crude protein content in the grain was highest in Zagorka, Yavor and Yukon. The highest yield of gluten was reported in Beloslava, Vazhod and Zagorka.

Popova Z.,Institute for Plant Genetic Resources | Ganusheva N.,Agricultural University of Plovdiv | Mokreva T.,Agricultural University of Plovdiv | Ganeva G.,Bulgarian Academy of Science
Genetics and Breeding | Year: 2010

Soft wheat lines developed by the set of 'Cappelle Desprez', 'Bezostaya 1' intervarietal chromosome substitution were included in the survey. The drought resistance of the lines was determined by reporting the seedling reaction against osmotic stress following the method of rolling crops in two repetitions using 1M solution of PEG 6000 (polyethylene glycol). The cultivar Bezostaya 1 and substitution line KD71 (6ABezl) showed highest tolerance under osmotic stress while KD 83(5DBezl) was characterized by highest sensitivity to simulated drought. The cultivar Bezostaya 1 and substitution line KD 71 (6ABezl) set up in independent clusters with higher relative drought resistance by this indicator, are of interest to various breeding programs. Plant breeders are recommended to apply the depression of growing processes under conditions of osmotic stress as a fast method to determine the relative drought resistance at all selection activity stages.

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