National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The phenomenon of stay-green and root traits are most important in drought tolerance breeding. The present investigation was conducted to identify the drought resistant stay-green genotypes with desirable root traits which are essential to extract moisture from deeper layers of the soil under drought conditions. Seven stay-green genotypes along with three non-staygreen checks were evaluated for root traits in PVP pipes with different soil moisture regimes under Factorial RBD design with two replications. Moisture stress was imposed from R1-R2 stage in moderate stress and from R1-R8 stage in severe stress treatment. The analysis of variance revealed the significant differences among the genotypes for all the root traits observed. The genotypes DSR 14 and DSR 47 have exhibited higher mean root length (102.50 cm each), root to shoot ratio (0.87 and 1.00), leaf area (151.35 cm2 and 137.70 cm2) and seed yield per plant under severe soil moisture stress condition when compared to other genotypes and checks. The checks Morden, RHA 6D-1 and RHA 95C-1 recorded mean root length respectively of 53 cm, 15.5 cm and 47 cm and root to shoot ratio of 0.66, 0.44 and 0.73, respectively under severe moisture stress condition. The average seed yield per plant for these identified genotypes, DSR 14 (13.74 g) and DSR 47 (12.38 g) was higher than that of the checks, Morden (5.38 g), RHA 6D-1(2.75 g) and RHA 95C-1 (3.55 g) under severe moisture stress condition. Hence, these genotypes can be used in further recombination breeding programme for drought tolerance.
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