Differential response of pigeonpea genotypes to stress at early vegetative phase

Study on differential response of pigeonpea genotypes to stress at early vegetative phase showed that of the 19 genotypes, TAT 9802 recorded more number of leaves (7.1) followed by WRG 47 (6.7), BWR 376 (6.7) and TAT 9629 (6.7). TAT 9629 also recorded maximum total fresh weight (5.19 g), total dry weight (1.33 g), more number of leaves (6.7), high leaf area (41.01 cm²), maximum area of primary leaf (12.0 cm²), tall (21.9 cm) and deeper root system (10.3 cm). Further, TAT 9629 also recorded high dry weight for stem (0.59 g) followed by AKT 9712 (0.52 g) and TAT 9802 (0.52 g) indicating efficient partitioning of the source towards shoot. On the other hand, WRG 47 (0.76 g) and TAT 9629 (0.74 g) recorded maximum leaf dry weights indicating efficient partitioning of the source to the leaves. Further, TAT 9629 genotype has recorded yield of 1589 kg/ha while WRG 47 has recorded above average yield of 1416 kg/ha. Thus in TAT 9629. most of the source is efficiently translocated to the vegetative parts of the plant i.e., shoot and leaves consequently increasing the photosynthetic efficiency of the plants and yield.