PERFORMANCE OF AROMATIC RICE (ORYZA SATIVA L.) VARIETIES AND THEIR F1 HYBRIDS UNDER LOWLAND AND UPLAND ENVIRONMENTS

Abstract

The performance of rice hybrids along with their parents was studied in two different environments i.e. lowland and upland. Statistically analyzed results showed significant differences among parents, hybrids and hybrids versus parents. The highest to lowest and medium values were observed under lowland, upland as well as in both the environments for parents and their F₁ hybrids. The highest mean value for days to 50% flowering was shown by hybrid Mehak x Vertin (90).  In contrast, the lowest value was exhibited by hybrid LR2 x Pandan (61). Whereas for days to maturity, hybrid LR2 x Pandan and Sugdasi x Pandan were noted as early maturing with 97 and 98 days, respectively. On the contrary, Mehak x Vertin was found to be late maturing and took 124 days.  Among the testers, Basmati 370 took 115 days to mature, followed by Pandan (114 days). Among the lines, Mehak took 113 days to mature. For plant height the lines Sugdasi and JJ77 were found to be tallest, while among the testers, Pandan was found tallest (103.69 cm). The plants of tester Basmati 370 were shortest (89.60 cm), followed by the line LR2 (91.77 cm). Highest number of productive tillers (20) was recorded in the hybrids DR 65 x Pandan and DR65 x Basmati 370.