Abstract:To analyze the distribution of leaf rust resistance genes in 66 bread wheat cultivars which were released in Qinghai Province,six molecular markers of leaf rust resistance genes ( Lr1, Lr9, Lr24, Lr29, Lr34, Lr42) were applied to test 66 wheat cultivars. Of the 66 Qinghai released cultivars,16 cultivars carry Lr1gene;0 cultivars carry Lr9 gene;18 cultivars carry Lr24 gene; 31 cultivars carry Lr29 gene; 5 cultivars carry Lr34 gene; and 23 cultivars carry Lr42 gene; accounting for 24.24%,0%,27.27%,46.97%,7.58% and 34.85% of the detected samples,respectively. Meanwhile,17 samples contain two resistance genes,accounting for 25.76%;9 samples contain three resistance genes,accounting for 13.64%; only ‘Qingchun 254’ contain four resistance genes. The distribution of Leaf Rust Resistance Genes in 66 wheat cultivars in Qinghai province provides the resources of resistance gene and has potential value for improving the resistance of leaf rust by pyramiding leaf rust resistant genes. |