Evaluation of some new plant type of upland rice (Oryza sativa L.) lines derived from cross breeding for the growth and yield characteristics

Abstract

Improving rice production through cross breeding is one of the efforts to overcome a major challenge in future need of rice consumers. An experiment was conducted to evaluate different upland rice lines for their growth and yield characteristics. Four rice lines including GS44-2 (V1), GS16-2 (V2), GS44-1 (V3), and GS16-1 (V4) were evaluated in a randomized complete block design (RCBD). The variables observed were vegetative character and generative character including grain yield. Data on various growth and yield characteristics revealed there were growth and yield characteristics different among breeding lines of local upland rice. Plant height at age 84 DAP, GS16-2 line was the tallest (92.71 cm) and GS44-1 line the shortest one (70.07 cm). Breeding line of GS16-2 produced higher leaf area (61.0 cm2), panicle length (30.94 cm), grain number per panicle (230.60), and filled grain number (190.25). The lowest unfilled grain percentage (26.67 %) was also recorded from GS16-2 lines. The highest number of tillers, number of productive tillers, grain dry weight, and grain yield were obtained from GS44-2 lines. Further, grain yield component such as grain dry weight and 1000 grain weight recorded positive and significant correlation with number of productive tillers per hill.