The Family Blood Pressure Program, including HyperGEN, was renewed in FY 2000. The Family Blood Pressure Program as a whole carried out five specific aims in the renewal period. These aims were grouped according to two complementary themes: First, the investigators created and analyzed a database of blood pressure-related phenotype and genotype data from all FBPP participants (Aim 1). Within linked regions, they identified allelic variation within positional candidate genes and evaluated the relationship of these polymorphisms with blood pressure levels and hypertension status (Aims 2 and 3). Second, they used quantitative measures of target organ damage to identify genes that influence susceptibility to develop hypertensive heart and kidney diseases (Aims 4 and 5). In addition to the Program specific aims, each network, including HyperGEN, carried out its own specific aims alone, based on unique aspects of their population and interests and expertise of the investigators.