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Revista Ceres

Print version ISSN 0034-737X


VASCONCELOS, Edmar Soares de et al. Estimates of genetic progress using different selection criteria in alfalfa genotypes. Rev. Ceres [online]. 2010, vol.57, n.2, pp.205-210. ISSN 0034-737X.

This study aimed to compare different selection criteria, indicate the selection method that provides larger estimates of genetic progress and identify superior genotypes for the evaluated morphological and bromatological characteristics. The experiment was conducted at Embrapa Pecuária Sudeste, São Carlos, São Paulo State, Brazil in a randomized blocks design, with two replicates. The evaluated characteristics were dry matter production, plant height, tolerance to diseases, fenotypic acceptance by animals, protein content, in vitro dry-matter digestibility, neutral detergent fiber and the stem/leaf relationship of ninety two alfalfa cultivars from INTA, Argentina. Cultivar Crioula was used as control.. Mulamba & Mock, distance from genotype to ideotype and Elston were most appropriate indexes for this type of study. The genotypes Sequel, CUF 101, Siriver 2, Florida 77, Diamond, Sequel 2, LE N 2, Medina, Kern, Rio Grande, DK 166, DK 181, Perla SP INTA, WL 516, Rocio, LE Semit 711 and LE N 3 were indicated for the selection considering the highest indexes obtained by Mulamba & Mock, distance from genotype to ideotype and Elston.

Keywords : genetic progress; index of combined selection; Medicago sativa L.; direct election.

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