The culture of Palm Tree Oil ( Elaeis guineensis Jacq.) has great socio-economic importance in the state of Pará, the country's largest producer. This culture has risen the growth potential in Brazil, by its oil demand, great productivity and competitiveness when compared to other cultures, availability of altered areas prone to offer favorable soil and weather conditions, generate jobs and income, and protect the soil due to its perennial character. However, the fatal yellowing of palm oil trees (FA) has been decimating millions of hectares of the culture in Pará, being thus one of the main limiting factors to the culture's expansion. The interspecific hybrid ( Elaeis guineensis x E. Oloifera) has been considered the most important solution to the FA, due to its resistance against it. This has lead to an open expansion of its culture, and it already surpasses 2.000 hectares, even though the genetic improvement program still is in initial stages.

This project aims to complement the characterization of interspecific hybrids through the evaluation of other traits, such as chlorophyll levels, dry matter on higher parts, leaf area, leaf area levels and bunch production from the third year after planting and on. These measures will be taken regularly, in the hopes of evaluating the variation between the genotypes throughout the year, in addition to allowing the study of association with climate variables.