Seleção de linhagens de feijoeiro tipo rosinha resistentes à antracnose, à mancha angular e de boa cocção

• Ano de defesa: 2007
• Autor(a) principal: Silva, Diego Velasquez Faleiro e
• Orientador(a): Santos, João Bosco dos
• Banca de defesa: Soares, Antônio Alves, Abreu, Ângela de Fátima Barbosa
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: UNIVERSIDADE FEDERAL DE LAVRAS
• Programa de Pós-Graduação: DBI - Departamento de Biologia
• País: BRASIL
• Palavras-chave em Português: Feijão; Melhoramento genético; Grão tipo rosinha; Common bean; Genetic breeding; Rosinha grain type
• Área do conhecimento CNPq: CNPQ_NÃO_INFORMADO
• Link de acesso: https://repositorio.ufla.br/handle/1/4186

Nowadays the carioca grain type of common bean is the most consumed and cultivated in Brazil, becoming a pattern in the market, although other kinds of grain type are also accepted in some places. The objective of this research was to select lines with a fast cooking rosinha grain type, high grain yield and resistant to anthracnose and angular leaf spot. One hundred and forty three F8:9 lines were selected within five F2:7 e F4:7 families from the Rosinha Maria da Fé x ESAL 693 cross. These lines were evaluated in five field experiments in two places of Minas Gerais State. The first experiment was set up in the rainy season of 2005/2006 at Lavras county, when the 143 lines plus the ESAL 693 check were evaluated. From these lines 99 were selected and evaluated in two places, Lavras and Lambari, in the dry season of 2006 plus the check Rosinha Maria da Fé. Finally two others experiments were set up in the winter/spring seasons of 2006, in Lavras and Lambari, where the 24 selected lines and the check Rosinha were evaluated. The square lattice design was used in all experiments, and the lines were evaluated for grain type and yield, and reaction to angular leaf spot. Besides, the 99 lines and Rosinha cultivar were inoculated with the race 65 of C. lindemuthianum for identifying the lines with the Co-5 allele for anthracnose resistance. The 24 lines selected in the dry/2006 season, and the check Rosinha were also evaluated for cooking ability using a complete randomized design. Phenotypic correlation was estimated between the traits evaluated in the field. The lines were genetically different in all evaluations for all traits, assuring success in the selection as confirmed by the high heritability estimates as well as high selection gains. All the 24 selected lines have the rosinha grain type, and 87% were resistant to C. lindemuthianum. The correlation between grain yield and grain type (r = -0,36*) was favorable for selecting high grain yield lines with ideal grain type. Besides the selected lines are resistant to anthracnose and angular leaf spot.