Of 153 samples reported to be resistant to leaf rust (Puccinia recondita Rob. ex. Desm.), only 70 were not affected by a complex P. recondita population. According to phytopathological tests (inoculation with test clones), 14 samples possessed the Lr19 gene; 36, the Lr24 gene; 1, the Lr41 gene; and 19 presumably had the Lr9 gene. The presence of these genes for resistance was confirmed by hybridological analysis for 26 samples. Of 28 samples reported to carry new effective genes for resistance other than the known genes, 23 were susceptible to the P. recondita population. In four of the other five samples, resistance proved to be controlled by known genes. Possible causes of false identification of new effective genes for leaf rust resistance in wheat are discussed.
Russian Journal of Genetics – Springer Journals
Published: Mar 25, 2006
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