Jatropha curcas L. is a perennial oleaginous plant which is known for its multiple uses. The oil extracted from its seeds is used in the manufacture of biodiesel and soap. The plant also has therapeutic virtues and insecticidal properties. In Burkina Faso, the species remains under exploited. Despite its potentialities, the genetic diversity of this phytogenetic resource is badly known. This study was conducted to determine the level and the structuring of the genetic variability of a collection of 70 accessions coming from the various phytogeographical sectors of the country and to estimate the genetic parameters of the various characters. Thus, an agro-morphological evaluation of the collection was carried out during the rainy season 2014. Eleven (11) quantitative characters relating to the vegetative development and the potential of production of the plant were used. This study revealed the existence of variability within accessions. The characters related to the yield showed greater variability than those related of the vegetative development. The analysis of the structuring of variability showed that plants which have an important vegetative development are more productive than those of little size.The estimate of the genetic parameters revealed a weak difference between the phenotypic and genotypic coefficients of variation and high broad sense heritability for all the characters. The characters related to the yield expressed the highest expected genetic advance, phenotypic and genotypic coefficients of variation. The results of the study can be exploited in Jatropha curcas' improvement program.

Northern Burkina Faso, was once a region where yams "y

Forty-one (41) accessions of the jute potager (Corchorus olitorius L.) collected in Burkina Faso were evaluated on July 2014 with twenty-five (25) characters according to a Latinized Apha-Plan. The global objective of this study is to contribute to a better knowledge of the agromorphological diversity of C olitorus of Burkina Faso. The study revealed that 75,61% of the accessions studied belong to C olitorius var olitoriu L. variety and 24,39% belong to C olitorius var incisifolius Asch.& Schw variety. It showed indeed that several characters discriminate the accessions at 1%. The study of the structuring of diversity revealed three groups of accessions on the basis of the plant height, stem diameter, width of leaf and leafy biomass. Thus, the group I is constituted of big size accessions with robust stem, high leafy biomass and thin fruits. The Group II is constituted of individuals with performances relatively low. The Group III is a mixed group constituted with 65% C olitorius var clitoris L. and 35% of C olitorius var incisifolius Asch. & Schw. This group is made up of individuals with reduced size, with weak leafy and big fruits.