Several experiments were conducted out during the 1999-2000 and 2000-2001 growing cycles: The adaptation and grain yield of 15 advanced lines of black and a local variety used as a control, were evaluated. These genotypes belong to the Central American Assay for Adaptation and Yield (ECAR).The bean genotypes were evaluated in eleven localities, five in the state of Chiapas and six in the state of Veracruz; the experiments were established under irrigated, upland and residual moisture conditions. ICTA Ju 97-1, II- 307, DOR-678 and Cut-45, were the most oustanding lines for yield, wide range of adaptation and stability. During the 1999-2000 Fall-Winter growing cycle, the response of the lines against Bean Golden Mosaic Virus (BGMV), angular leaf spot (Phaseoisariopsis griseola), rust (Uromyces appendiculatus), and anthracnose (Colletotrichum lindemuthianum) were evaluated; ICTA Ju 97-1 and Cut-45 were tolerant to those diseases. Both lines must be validated in farmer fields in order to be considered for releasing as new varieties for some bean growing areas of Veracruz and Chiapas, Mexico.