Comportamento de germoplasma de batata-doce em Sergipe

• Ano de defesa: 2012
• Autor(a) principal: Oliveira Neto, Manoel Antônio de
• Orientador(a): Blank, Arie Fitzgerald
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Sergipe
• Programa de Pós-Graduação: Pós-Graduação em Agroecossistemas
• País: BR
• Palavras-chave em Português: Ipomoea batatas; Germoplasma; Interação genótipo x ambiente; Amido; Etanol
• Palavras-chave em Inglês: Ipomoea batatas; Germplasm; Genotype x environment interaction; Starch; Ethanol
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::AGRONOMIA
• Link de acesso: https://ri.ufs.br/handle/riufs/6637

The aim of this work was to evaluate the performance of sweet potato (Ipomoea batatas L.) clones cultivated in three counties of Sergipe, Brazil. The experimental design was randomized blocks with three replications. We tested 28 accessions and three cultivars (Brazlândia Branca, Brazlândia Rosada and Palmas) of sweet potato grown in three counties of the Sergipe State (São Cristóvão, Malhador e Canindé de São Francisco). The analyzed variables were: dry weight of aerial part, dry matter content of aerial part, total root yield, total yield of marketable roots, weight per root, root form, resistance to soil insects, dry matter content of roots, starch content in the roots, yield of starch, ethanol and ethanol per ton of root. We realized an analysis of variance per local and a joint analysis of variance to analyze the genotype x environment interaction. We observed for cultivar Brazlândia Branca and the accessions IPB-075, IPB-079 and IPB-087 values of total yield of roots from 27.83 to 43.01 t.ha-1, from 29.64 to 63.28 t.ha-1, from 30.44 to 41.67 t.ha-1, from 35.12 to 48.18 t.ha-1, respectively, and values of total yield of marketable roots from 27.70 to 42.41 t.ha-1, from 26.63 to 63.17 t.ha-1, from 26.77 to 41.66 t.ha-1, and from 30.86 to 46.28 t.ha-1, respectively and scores of resistance to soil insects from 1.20 to 1.81, from 1.53 to 2.02, from 1.59 to 1.88, and from 1.74 to 2.37, respectively. For ethanol yield the clones IPB-075, IPB-087 and the cultivar Palmas, with their respective values of intervals in the three environments, we observed values from 5910.39 to 8516.12 L.ha-1, from 5141.85 to 6937.63 L.ha-1 and from 5829.62 to 8211.77 L.ha-1 for São Cristóvão, Malhador and Canindé de São Francisco, respectively. There were significant differences for genotypes, environments and genotype x environment for all variables. Estimates of heritability (h2) were above 50% for all variables except for resistance to soil insects in the Malhador county (15.39%) and Canindé de São Francisco (40.41%). The values of the CVg/CVe ratio for dry weight of aerial part, total yield of roots, total yield of marketable roots, root form, resistance to soil insects, dry matter content of roots, starch content in roots and ethanol per ton of roots were high, justifying their use in breeding programs. All genotypes showed variability in each environment with exception for the variable resistance to soil insects in the Malhador county, and between environments, with exception for the variable dry weight of aerial part.