High stocking rate livestock management has determined the decline of native species of high forage value as Bromus auleticus Trin ex Nees in the Campos region of the Rio de la Plata grasslands. The species has some agronomic and ecological characteristics that define it as of high potential to be reintroduced in degraded natural grasslands. However, Bromus auleticus has not been sufficiently described, since commercial seeds and information regarding the establishment phase are scarce.

Eucalyptus tereticornis has a wide natural geographic distribution from Papua New Guinea to South Australia (6º-38º S), therefore, it is expected the existence of important differences among provenances. Although differences in performance among provenances have been reported in several countries, the existing information is insufficient to allow the choice of the most appropriate provenance as a source of seeds for commercial plantations for humid subtropical climates. In order to evaluate the performance of 20 provenances of E.

CONTENIDO.- 1.- Resumen de la información presentada en el Día de Campo Forestal anterior (abril de 2022). Gustavo Balmelli (INIA). -- 2.- Proyecto de Mejoramiento Genético mediante hibridación. Gustavo. Balmelli (INIA). -- 3.- Fósforo y Boro en plantaciones de Eucaliptos en Uruguay. M. Ferrando (FAGRO). -- 4.- Crecimiento de E. smithii y comparación con simulador SAG globulus. Rachid-Casnati (INIA). -- 5.- ¿Existe relación entre las propiedades del suelo y la muerte súbita de E. smithii?. M. Pérez (FAGRO), Cecilia Rachid-Casnati (INIA), Consorcio Forestal.

En este trabajo evaluamos el potencial del método XP-GWAS (Extreme-Phenotype GWAS) para identificar genes candidatos subyacentes a un rasgo cuantitativo en Eucalyptus, utilizando como caso de estudio el momento en que se produce la heteroblastia foliar.

ABSTRACT.- Eucalyptus globulus is one of the most planted forest species in Uruguay. However, its high susceptibility to diseases has determined that in recent years most plantations reaching harvest are replaced by other species, mainly E. dunnii and E. smithii. The decision whether to maintain the plantation for an additional rotation as coppice crop or to carry out a replanting depends on the expected economic results of both alternatives. Therefore, the objective of this research was to estimate the profitability of a coppice crop of E.

The plantation and natural forests of South America have been highly impacted by native and exotic pests in recent decades. The interaction of emerging invasive pests, climate change, and timber markets will define the region?s forests, with significant but uncertain ecological changes and economic losses expected.