Genótipos de soja resistentes à ferrugem, oriundos de germoplasma com ampla base genética

• Ano de defesa: 2012
• Autor(a) principal: Souza, Débora Santana de Matos
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Mato Grosso; Brasil; Instituto de Ciências Agrárias e Tecnológicas (ICAT) – Rondonópolis; UFMT CUR - Rondonopólis; Programa de Pós-Graduação em Engenharia Agrícola
• Palavras-chave em Português: Glycine max (L); Linhagens; Melhoramento; CNPQ::CIENCIAS AGRARIAS::ENGENHARIA AGRICOLA; Lineages; Improvement
• Link de acesso: http://ri.ufmt.br/handle/1/1122

The objective of this study was to develop cultivars that have high grain productivity, along with other characteristics that optimize its production, as resistance to biotic and abiotic stresses. This experiment was carried out in an experimental field in the Mato Grosso Federal University (UFMT), in the municipality of Rondonópolis, State of Mato Grosso, Brazil. The tests were settled in randomized block designs having three repetitions. 57 soybean genotypes from the Uberlândia Federal University were evaluated, being 24 lineages and three witnesses of medium early/medium cycle and 25 lineages and five witnesses of medium late/late cycle. The tests were performed in duplicity, being one of them subject to treatment with fungicide and another one with no treatment. The variables analyzed were: severity and number of pustules cm2 of the Asian rust (AACPD), chlorophyll content, stomatal conductance, number of days for blooming, plant height under maturation, and insertion of the first pod, grain productivity, 100-grain weight, number of pods per plant, and grain per pod. The results were subject to analysis of variance by means of the statistics program Sisvar, developed by the Lavras Federal University. The materials that stood out in the test of medium early/medium cycle were UFUS 13 and the witness Richness, which displayed more resistance to the pathogen, while genotype UFUS 02 stood out the characters plant height, insertion into the first pod, grain percentage and productivity. As to the semi late/late cycle test lineages UFUS 006 and UFUS 023 showed better performances related to plant height under maturation, productivity, 100-seed weight, seed percentage and resistance to Asian rust.