Linkage between leaf rust resistance genes and morphological markers in Barley

Studies were undertaken to map the chromosome location of leaf rustresistance genes Rph3, Rph7, and Rph12 in the barley cultivars Estate, Cebada Capa, and Triumph using various morphological markers. Crosses were made between genotypes resistant to Puccinia hordei and leaf rust susceptible morphological marker stocks. F 2 plants were evaluated for reaction (infection type) to P. hordei, and presence of morphological marker characters. Segregation data indicated the position of the Rph3 allele in Estate barley on the long arm of chromosome 1 []