ESTIMATION OF THE COLLECTION RICE ACCORDING TO RESISTANCE TO CEREAL APHID

Abstract

Ordinary cereal aphid causes great damage to rice plants in the Rostov region and the Krasnodar Territory. Its harmful effects can be limited with the help of plant genetic resistance. The study of resistance of collection rice material to aphids has only recently begun. Therefore, there is a need to analyze the hereditary polymorphism of rice samples according to resistance to ordinary cereal aphid. 494 collection samples of the laboratory for rice breeding and seed production at the FSBSI Agricultural Research Center “Donskoy” were the material for the research. In laboratory VIR conditions, young rice plants were infected by the Krasnodar ordinary aphid, after which there was performed a phenotypic damage assessment using a scale from 0 (no damage) to 10 (plant death). Due to the study it was found that most of the samples were unstable or weakly stable. There were identified 15.1% of relatively stable forms, their damage was 1–4 points. Most samples showed a wide range of variation in plant damage from 1 to 10 points. Only 41 samples out of the 494 studied ones were homogeneous, all plants of which received the same point (1, 2, 3, 4, 8, or 10); the rest samples were heterogeneous. 167 samples received two variants of points, 226 samples received three, 60 samples received four. The rice samples ‘Kandidat’, ‘Komandor’, ‘PF-4186’, ‘Norin 31’, ‘Priozerny 61’, ‘Don 7243’, ‘Don 4237’ can be recommended as sources of resistance to ordinary cereal aphid to develop new rice varieties.