Rice breeding on salt tolerance

Abstract

Salt tolerance of rice is of great importance in agricultural production, since productivity of grain grown on saline lands largely depends on it. The paper deals with determining the presence of salt tolerance gene “Saltol” in rice hybrids obtained from crossing contrasting samples. To analyze salt tolerance, there were used seeds germinated in cups with distilled water and 1.5% NaCl solution, after which 10-day-old seedlings were weighed and their ratio to the control was determined. As a result of studies, there have been identified salt tolerant lines carrying the gene “Saltol” in a homozygous state. In the control nursery there were studied the best samples on productivity and elements of its structure. Two lines “7328” and “7322” were selected from the hybrid IR 52713-2B-8-2B-1-2 x Novator which significantly exceeded the standard variety “Yuzhanin” on 0.57-1.28 t/ha. On average for 2 years, they produced 6.82-7.53 t/ha (6.25 t/ha of the standard variety).

Keywords

• rice
• hybrid
• salt tolerance
• pcr-analysis
• productivity