Evaluation of dry resistance of rice samples by changing yield with lack of moisture

Abstract

Relevance. Among the many abiotic stresses, drought or water scarcity are considered the most important constraints on rice production in many areas of rice production. The purpose of the research is to study collection, hybrid and breeding rice samples for resistance to prolonged drying out of the soil and air drought, selection of droughtresistant forms for creating varieties of a new type. Materials and methods. The object of the study were 65 varieties and samples of dry land rice in the laboratory of rice selection and seed production of the ARC “Donskoy” on the basis of the OP “Proletarskoye” of the Rostov region, which were grown on arid and normal irrigation background.Results. It was found that plants under normal and dry conditions formed differently, and the grain yield under periodic irrigation averaged 71.3% of the norm. The varieties Kontakt, Zolotye vshody, Malovodrebovatelny, lines ZULK 6 and ZULK 15 were identified, the ratio of experience to control (O/C) in which ranged from 106.9 to 138.0%. Elongation of time to flowering was noted in all samples, but to varying degrees, from 4.9 to 25.7%. The maximum yield in dry conditions was formed by the varieties Boyarin (4.43 t / ha), Kontact (4.53 t / ha), Zolotye vshody (4.60 t / ha) and Sukhodol (4.60 t / ha).