Avaliação agronômica e análise da persistência em uma coleção de acessos de Paspalum notatum Flügge (Poaceae)

Abstract

Paspalum notatum is an important forage species widely occurring in Southern Brazil, consisting of sexual (diploid) and apomitic (tetraploid, occasionally tri and pentaploid) biotypes. This work has the objective to perform an agronomic characterization and persistence analysis of a collection of P. notatum accessions. Fifty two accessions of P. notatum, the commercial cultivar Pensacola and two biotypes of P. guenoarum, Baio and Azulão were evaluated. The assessments were performed in individual plants, in a completely randomized design, with five replicates, during the years of 2008-2009. There was variation for forage production among the different accessions, with the majority of the accessions of P. notatum showing high dry matter yield (ranging from 469 g plant -1 to 109 g plant -1 of total forage dry matter (TFDM)) when compared to the cultivar Pensacola (27 g plant -1 of TFDM). The accessions 48N, 95N, 30N and V4 showed the highest yields (469, 380, 258 and 237 g plant -1 of TFDM) and also persistence to the winter in the region. It was concluded that the collection analyzed can be important in futures studies for P. notatum genetic improvement.