TRY 4: A high yielding, mid early sodicity tolerant rice variety suited to Tamil Nadu

Abstract

Sodicity tolerant rice culture TR 05031, a derivative of the cross ADT 39 x CO 45 was released as Rice TRY 4 during the year 2021 as a mid early duration variety with 127 days duration with high yield, high milling (68.1 %) and head rice recovery (57.2 %). Twelve years of testing across 181 locations in Tamil Nadu revealed that the culture is high yielding (5730 kg/ha with 22.00 per cent increased grain yield over TKM 13 and 16.50 per cent over ADT 39) in salt affected soils. EDAX under SEM studies confirmed that, there was a lesser transport of sodium ions and higher transport of potassium ions from root to shoot in this culture, TR05031. Besides, TR05 031 maintain more tracheids / unit leaf area and accumulate salts to the outer epidermal layer through specialized trichomes, providing resistance to salinity. The culture TR05031 is resistant to major diseases viz., blast and brown spot and has field resistance to major pests viz., leaffolder, stem borer and gall midge. TR05031 with high yield, better pest and disease resistance and good cooking quality is suitable for cultivation during late samba/thaladi in salt affected patches of Tamil Nadu. The culture was released as TRY 4 during 2021 and notified by Government of India for seed production.

Effect of Different Levels of Sodicity on Soil Enzymes, Soil Microbial Biomass Carbon and Activity of Antioxidant Enzymes in Different Rice Varieties under Semi-arid Conditions

“…It is in agreement with the studies of Tripathi et al (2018). In case of different rice variety, the highest CAT activity was recorded in CO 43 followed by TRY 3, TRY 1, CSR 27, TRY 2 and the lowest activity was found in W P. The results are in accordance with Geetha et al (2022), where the tolerant rice varieties recorded higher CAT activity than susceptible varieties. In interaction between the ESP levels and variety, the tolerant 6, 11.5, 11.9, 11.7, 11.5 and 11.1 min -1 g -1 , respectively (Table 5).…”

Comparative delineation of genetic variability and association among yield and its contributing traits under sodic and normal soil conditions in rice (Oryza sativa L.)

“…This may be due to several anatomical and physiological mechanisms of these genotypes facilitating them to outperform the check genotypes under sodicity. Geetha et al (2022) These genotypes were also evaluated for sodicity tolerance under hydroponics condition. The susceptibility reaction of all these outperforming genotypes showed that they are susceptible to sodicity stress at seedling stage (Unpublished).…”