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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Genetic studies on pleiotropic polyoxin resistant mutants of Bipolaris maydis / トウモロコシごま葉枯病菌の多面的なポリオキシン耐性株の遺伝学的研究

Chen, Daidi 26 March 2018 (has links)
京都大学 / 0048 / 新制・課程博士 / 博士(農学) / 甲第21158号 / 農博第2284号 / 新制||農||1060(附属図書館) / 学位論文||H30||N5132(農学部図書室) / 京都大学大学院農学研究科地域環境科学専攻 / (主査)教授 田中 千尋, 教授 本田 与一, 教授 宮川 恒 / 学位規則第4条第1項該当 / Doctor of Agricultural Science / Kyoto University / DGAM
2

Retrotransposon LTR no genoma de Moniliophthora perniciosa e Cochliobolus heterostrophus / LTR retrotransposon in the genome of Moniliophthora perniciosa and Cochliobolus heterostrophus

Santana, Mateus Ferreira 24 July 2009 (has links)
Made available in DSpace on 2015-03-26T13:51:50Z (GMT). No. of bitstreams: 1 texto completo.pdf: 474764 bytes, checksum: dc1db5661d6bff9e0de8af890d4b1836 (MD5) Previous issue date: 2009-07-24 / Conselho Nacional de Desenvolvimento Científico e Tecnológico / Gypsy/Ty3 group retrotransposons are the main transposable elements found in the genome of pathogenic fungi. In this work, two retrotransposons termed MpSaci and Sophie were analyzed in Moniliophthora perniciosa and Cochliobolus heterostrophus, respectively. MpSaci was used to assess molecular markers based on transposable elements IRAP and REMAP. When 70 isolates of M. perniciosa were analyzed, a total of 43 loci were amplified by generating 46.51% polymorphism. Significant differences were found between populations of M. perniciosa divided in relation to biotope and the geographical origin, showing that populations are structured on the geographical origin and the host (biotype). The cluster analysis of different geographical regions of biotype C were observed two large groups that show two main entrances of the pathogen in the state of Bahia. Searches done in the database of the Genome Project of C. heterostrophus (JGI- Genome) showed the presence of DNA sequences with similarity to reverse transcriptase of Class I elements belonging to the group Gypsy/Ty3. Based on these sequences could be found seven different copies of an intact transposable element named Sophie. The analysis of 37 sequences of the reverse transcriptase gene showed a possible silencing mechanism similar to RIP. The seven copies of the element Sophie had 7426 bp 7512 bp. The retrotransposon sequences Sophie has two open reading frames (ORFs) that encode the Gag protein and the Pol polyprotein. The presence of different target sites suggests that Sophie is an element with recent activity in the genome of C. heterostrophus can have a great impact on the evolution of the genome of its host. / Retrotransposons do grupo Gypsy/Ty3 são os principais elementos transponíveis encontrados no genoma de fungos fitopatogênicos. Neste trabalho, dois retrotransposons denominados de MpSaci e Sophie foram analisados em Moniliophthora perniciosa e Cochliobolus heterostrophus, respectivamente. MpSaci foi utilizado para avaliar os marcadores moleculares baseados em elementos transponíveis IRAP e REMAP. Quando 70 isolados de M. perniciosa foram analisados, o total de 43 locos foram amplificados gerando 46,51% de bandas polimórficas. Diferenças significativas foram encontradas entre as populações de M. perniciosas divididas em relação ao biótipo e à origem geográfica, demonstrando que as populações encontram-se estruturadas quanto à origem geográfica e ao hospedeiro (biótipo). Pela análise de agrupamento de diferentes regiões geográficas do biótipo C foram observados dois grandes grupos que evidenciam duas principais entradas do patógeno no estado da Bahia. Buscas feitas no banco de dados do Projeto Genoma de C. heterostrophus (JGI - Genome) revelaram a presença de seqüências de DNA com similaridade a transcriptase reversa de elementos da Classe I pertencentes ao grupo Gypsy/Ty3. Com base nessas seqüências foi possível encontrar sete cópias diferentes e intactas de um elemento transponível que foi denominado Sophie. A análise de 37 seqüências do gene da transcriptase reversa demonstrou possível mecanismo de silenciamento semelhante a RIP. As sete cópias do elemento Sophie apresentaram 7.426 pb a 7.512 pb. O retrotransposon Sophie possui duas seqüências de leitura abertas (ORFs) que codificam a proteína Gag e a poliproteína Pol. A presença de diferentes sítios-alvo sugere que Sophie é um elemento com atividade recente no genoma de C. heterostrophus podendo ter grande impacto na evolução do genoma do seu hospedeiro.
3

Functional analysis of signaling components regulating pathogenicity and asexual/sexual development in Bipolaris maydis / トウモロコシごま葉枯病菌の病原性、有性的・無性的形態形成を制御する情報伝達因子の機能解析

Kitade, Yuki 25 March 2019 (has links)
京都大学 / 0048 / 新制・課程博士 / 博士(農学) / 甲第21840号 / 農博第2353号 / 新制||農||1069(附属図書館) / 学位論文||H31||N5212(農学部図書室) / 京都大学大学院農学研究科地域環境科学専攻 / (主査)教授 田中 千尋, 教授 本田 与一, 准教授 刑部 正博 / 学位規則第4条第1項該当 / Doctor of Agricultural Science / Kyoto University / DGAM

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