Seed production is an important sector in crop production with high added value. Quality seed enables to exhibit the characteristics of the grown variety and to utilize its revenue potential. The diploma thesis features an analysis of the current market situation with organic certified seed in the Czech Republic in terms of the structure of seed multiplication areas, the quantity of recognized certified seed and permitted conventional untreated seed. Further assessment deals with the need for organic certified seed compared to current production in organic farming, evaluation of the structure of currently used seed in organic farming and possible causes of the lack of organic seed are also determined, including the proposed action. The literature review focuses on environmental seed production legislation, propagation, quality and seed control. The results of this thesis suggest that organic seed is propagated in the CR in an insufficient extent, for example, in comparison with neighbouring Austria. The quantity of organic certified seed in the CR is currently insufficient and does not cover the organic farming needs for growing major crops. Farm saved seed and permitted conventional untreated seed are predominantly used to establish vegetation. Organic seed was used in the minimum quantities.

Thesis aims to evaluate the performance of certified and farming potato seed cultivars of Red Anna and Monika. Following aspects were evaluated: number of full-grown, tuber yield, the average number of tubers in a bunch, the average weight of tubers in a bunch, the average weight of one tuber and starch content. The experiment started in 2013 on the farm of Ing. Tomáš Dušička in Plasy. In the experiment there were used cultivars of Red Anna and Monika because of good reputation. Certified seed was used in reproduction level C2, farmer seed was gained in the same location. Tubers were planted on the 5th May 2013, using two row seed planter (row spacing 75cm and tuber distance 25cm). Tubers were planted in the height of 16cm. In the planted rows of field experiment there was marked area of 10m2 per repetition, which requires 45 full-grown bunches in the plot. Harvest of experimental plots was carried out manually since 15th to 17th September 2013. Each bunch was dug, then the total number of tubers in a bunch was counted. Finally, the whole bunch was weighted. Tubers were sorted into two categories by size using sieve (mesh size 40mm). Both categories were weighted. Study results reveal that in the first year of planting of own farm seed may not significantly affect the yield and starch content. In case of farm seed of Monika cultivar there was 12% increase in revenue and slightly higher yield of tubers for consumption.

Submitted by Gabriela Lopes (gmachadolopesufpel@gmail.com) on 2018-07-04T13:31:09Z No. of bitstreams: 1 Dissertação Aislam Final´6 copias.pdf: 944206 bytes, checksum: 09bacfd0bf943297e259a285f9846e8e (MD5) / Approved for entry into archive by Aline Batista (alinehb.ufpel@gmail.com) on 2018-07-11T11:55:09Z (GMT) No. of bitstreams: 1 Dissertação Aislam Final´6 copias.pdf: 944206 bytes, checksum: 09bacfd0bf943297e259a285f9846e8e (MD5) / Approved for entry into archive by Aline Batista (alinehb.ufpel@gmail.com) on 2018-07-11T11:57:10Z (GMT) No. of bitstreams: 1 Dissertação Aislam Final´6 copias.pdf: 944206 bytes, checksum: 09bacfd0bf943297e259a285f9846e8e (MD5) / Made available in DSpace on 2018-07-11T12:00:48Z (GMT). No. of bitstreams: 1 Dissertação Aislam Final´6 copias.pdf: 944206 bytes, checksum: 09bacfd0bf943297e259a285f9846e8e (MD5) Previous issue date: 2017-03-27 / A utilização de sementes de alta qualidade é fundamental para o sucesso de uma lavoura de soja (Glycine max). É a cultura agrícola que mais cresceu nas últimas três décadas e corresponde a 49% da área cultivada em grãos do país, sendo responsável por movimentar a economia brasileira. Para essa produção, o uso de sementes legais constitui-se em uma ferramenta de extrema importância para o produtor agrícola, más, por diversas razões os agricultores utilizam semente salva ou informal. O objetivo do presente trabalho foi identificar a taxa de utilização de sementes de soja junto aos produtores e associados da área de abrangência da C.Vale regional 8 e apontar os critérios que influenciam o usuário de sementes no momento da aquisição e uso de sementes, bem como identificar aspectos importantes para a atuação da cooperativa junto ao agricultor. Foi realizada uma pesquisa de levantamento com aplicação de 60 questionários em associados e produtores de 12 unidades de negócio. A coleta de informações foi efetuada no período de 01/09/2016 a 20/12/2016 para coincidir com a época de semeadura da cultura da soja nas propriedades. Os resultados obtidos foram: a) a taxa de utilização de sementes certificadas por parte dos produtores assistidos pela Regional 8 da C.Vale é de 37%; b) a qualidade é fator determinante para a aquisição de sementes certificadas, seguida de cultivar e ciclo, ao passo que preço é o principal aspecto que influencia os produtores a manterem sementes salvas em suas propriedade; c) a cooperativa deve atuar junto a seu departamento técnico com a finalidade de destacar a importância de utilização de sementes certificadas bem como do tratamento industrial, para que essas informações cheguem ao agricultor de forma clara e objetiva conquistando o seu espaço no amplo e competitivo mercado de semente. / The use of high quality seeds is fundamental to the success of a soybean crop (Glycine max). It is the agricultural culture that has grown the most in the last three decades and corresponds to 49% of the area cultivated in grains of the country, being responsible for moving the Brazilian economy. For this production, the use of legal seeds is in an extremely important tool for the farmer, bad for several reasons farmers use seed saved or informal. The objective of this study was to identify the utilization of soybean seeds with producers and associates of the area covered by the regional C. Vale 8 and point out the criteria that influence the seed user at the time of the acquisition and use of seeds, identify, important aspects for the operation of the cooperative with the farmer. One survey research with application of 60 questionnaires in associates and producers of 12 business units was carried out. The information was collected in the period from 01/09/2016 to 12/20/2016 to coincide with the sowing season of the soybean crop in the properties. The results obtained were: a) the rate of utilization of certified seeds by the producers assisted by Regional 8 of C. Vale is 37%; B) quality is a determining factor for the acquisition of certified seeds, followed by cultivation and cycle, while price is the main aspect that influences producers to keep seeds saved on their property; C) the cooperative must work together with its technical department to highlight the importance of using certified seeds as well as industrial treatment, so that this information reaches the farmer in a clear and objective manner conquering its space in the wide and competitive market seed.

The main aim of this thesis was to evaluate the manifestation of certified seed and farm seed in selected varieties of potatoes. The experiment started in 2015 on the estate of Agricultural faculty of the University of South Bohemia. Four varieties (Magda, Adéla, Laura, Satina) with different vegetation period were planted. The certified seed was used in step A and the farm seed was divided according to size and it was tested for the presence of virus diseases. It was established 32 plots. The harvest of testing plots was on 29th September 2015. Each plot was harvested into the separate bag. Then the size sorting was done and individual tubers were counted. Based on measured values were determined the tuber yield, the yield of table potatoes, the content of the starch and the average weight per tuber. It was also observed the number of emerged plants of each variety and the number of stems per plant. The obtained results show that the use of farm seeds in the first year doesn´t have to mean an immediate decline in yield but varieties Magda, Adéla and Satine even increased their average yield about 9 t/ha. Only the yield of variety Laura was higher in certified seed by 4 t/ha. It wasn´t proved the impact of the chosen seed to the content of starch.