EVALUATION AND QUALITY ANALYSIS OF NEW PLANT TYPE (NPT) ADVANCED LINES OF RICE FOR AMAN SEASON

Abstract

A field experiment was conducted with three advanced lines (AL-29, AL-36, AL-18) and two check varieties (BRRI dhan-39, BRRI dhan-49) of rice (Oryza sativa L.) at Sher-e- Bangla Agricultural University experimental farm, to perform varietal characterization and to carry out of yield evaluation based on different morphological characters during the period of June 2014 to December 2014. The experiment was laid out in a randomized complete block design with three replications. In the experiment highest plant height was for BRRI dhan 49 (106.5 cm) and days to 50% flowering for AL-36 which required maximum days (106 days). For days to maturity, BRRI dhan 39 required highest days (142 days) and maximum number of tillers showed AL-36 (22.33). Maximum number of effective tillers showed AL-36 (2.87) and maximum panicle length showed AL-29 (26.68 cm).The highest number of filled grains was for AL-29 (178.30) and the highest number of empty grains was in BRRI dhan 99 (22.00). For 1000-grain weight, AL-36 was the best than others (2.437g). AL-36 showed highest yield per plant (49.19), AL-29 showed highest yield per plot (10.75 g) and yield per hectare (6.32 ton). In correlation analysis a highly significant positive association was found for days to 50% flowering with grain yield/ha. The maximum length (9.667 mm), breadth (1.910 mm)and L/B ratio (5.063 mm) of rough rice was showed for AL-18. The maximum length (6.810 mm) and L/B ratio (4.087 mm) of brown rice was showed for BRRI dhan 39 and maximum breadth (1.793 mm) of brown rice was showed for AL-18. The maximum length (6.547 mm) and breadth (1.670 mm) of milled rice was showed for AL-18.and maximum L/B ratio (4.607 mm) of milled rice was showed for BRRI dhan 39. The maximum length (9.357 mm), breadth (2.437 mm) and L/B ratio (4.147 mm) of cooked rice was showed for BRRI dhan 39. The maximum milling percent (71.97%), head rice recovery percent (67.27%) and alkali spreading value (6.933) were found from BRRI dhan-49. The maximum hulling percent (81.00%) and water absorption percent (269%) were found from AL-36 whereas maximum volume expansion percent (72.33%) was found from AL-29. In correlation coefficient analysis highly significant positive associations were found for length of rough rice with breadth of rough rice and length of brown rice, breadth of rough rice with length of brown rice and L/B ratio of brown rice with L/B ratio of milled rice. Highly significant negative associations were found for breadth of milled rice with L/B ratio of milled rice.