Introduction and evaluation of elephant grass (Pennisetum purpureum Schum.) clones in Campos dos Goytacazes, Rio de Janeiro

Daher, R.F.; Vazquez, H.M.; Pereira, A.V.; Fernandes, A.M.

Revista Brasileira de Zootecnia 29(5): 1296-1301


ISSN/ISBN: 1516-3598
Accession: 003482692

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Fifteen intraspecific hybrids (clones) and 2 cultivars of elephant grass were evaluated in a randomized block design with 4 replicates at the Forage Production Section at Campos dos Goytacazes, RJ, from February 1995 to December 1997 (12 harvests). Entries were evaluated for total dry matter (DM) production, dry season production, contribution of dry season to total annual production, percentage leaves, height (m), diameter of stem at the base (mm) and number of tillers per m. Except for CNPGL91 clones F28-1, F01-2, F13-2 and F10-2 and the cultivar Mineiro, all entries were satisfactory for total DM production, while DM production during the dry season, contribution of dry season to total annual production and percentage leaves presented no significant differences among clones. Cluster analysis on the basis of Mahalanobis' generalized distance (D2) statistic identified 7 groups among the entries. Entries in groups 2 (Pioneiro and CNPGL91 F27-5) and 5 (CNPGL91 F25-3 and CNPGL91 F06-3) were best for total DM production, being the most highly adapted groups for Campos dos Goytacazes. Stem diameter and plant height at cutting in the wet season and in the dry season were the most important traits for discriminating clones.