Heterosis for biochemical constituents and protein profiles of elite rice hybrids of Tamil Nadu

Heterosis for grain yield is the outcome of several physiological as well as biochemical characters which have been relatively less investigated though their contribution is certain. Study was taken to assess the hybrid vigour of two high yielding rice hybrids namely CoRH 2(6.5t/ha) and ADTRH 1(7.0 t/ha) and their parents (IR 58025 A X C 20R; IR 58025 A X IR 66R respectively) in terms of some important physiological parameters such as chlorophyll content, soluble protein, variation in protein banding and nitrate reductase activity. All the physiological parameters were high in the hybrids than their parents throughout the crop growth period. Among the hybrids ADTRH 1, recorded higher chlorophyll content, soluble protein and Nitrate Reductase activity. The study on protein profiling showed differences in protein banding new protein bands between the parents and hybrids, while new bands of 90 kDa, 60kDa, 50kDa and 45kDa were present in the hybrids. Finally, the study revealed that ADTRH 1 performed better than CoRH 2.