Abstract

MITTELMANN, Andréa et al. Agronomic characterization of ryegrass landraces at Southern Brazil. Cienc. Rural [online]. 2010, vol.40, n.12, pp. 2527-2533.  Epub Dec 17, 2010. ISSN 0103-8478.  http://dx.doi.org/10.1590/S0103-84782010005000197.

Landraces are an important source of genetic variability in breeding programs. In spite of this, little is known about South American Italian ryegrass populations. The objectives of this research were to characterize a group of Brazilian Landraces of Italian ryegrass for dry matter production and other traits of agronomic importance, and to study genetic divergence among them. Thirty-seven populations were evaluated in a randomized block design with four replications. Dry matter production varied from 1752.53 to 3905.67kg ha^-1, with nineteen populations in the most productive group and 'BRS Ponteio' ranking as the first one. Brazilian ryegrass populations differ for dry matter production and winter dry matter production. Populations with longer vegetative cycle may be identified.

Keywords : genetic resources; forage species; landraces; Lolium multiflorum Lam.