GENETIC DIVERSITY AND CROP IMPROVEMENT IN PEPPER (PIPER NIGRUM)
Paper chromatograms of methanolic leaf extracts from different species yielded 20 phenolic spots. One of these phenolic spots was common and therefore constitutes a useful chemotaxonomic marker for the genus Piper. The percentage of oil, oil constituents, oleoresin and piperine in the local selections of P. nigrum tended to be greater than in the two introductions and in the other species of Piper. The significance of these results for the breeding and crop improvement of P. nigrum is discussed.