Genetic diversity of barley accessions from Mongolia for greenbug resistance

BACKGROUND: Significant damage to barley crops in the southern regions of Russian Federation is caused by greenbug Schizaphis graminum Rondani. Cultivation resistant varieties a cheap, efficient and environmentally friendly way combat phytophage. The specificity relations between S. shown, that determines need broad genetic diversity cultivated varieties.
 AIM: study effectiveness control resistance accessions from Mongolia.
 MATERIALS AND METHODS: We studied 175 landraces Mongolia for Krasnodar aphid population. assessed lines selected heterogeneous k-3885, k-3904, k-4080, as well variety Post (a carrier previously identified Rsg1 gene) 86 clones isolated Under laboratory conditions, segregation F2 hybrids was analyzed crossing three with susceptible tester.
 RESULTS: Five were identified, which plants high pest found; 28 accessions, leaf surface component varied 31% 60%. As result assessment four clones, 15 virulence phenotypes identified. Accessions k-3904 k-4080 each have one dominant allele, differ other Rsg1.
 CONCLUSIONS: terms low. genotypes differentially interact not only major, but also weakly manifested genes.