YIELD AND QUALITY ANALYSIS OF ADVANCED LINES OF NEW PLANT TYPE (NPT) RICE (Oryza sativa L)

Abstract

The experiment was conducted at the experimental Farm. Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar. Dhaka. Bangladesh during July 2011 to December 2011. Six advanced NPT lines of rice AL-36, AL-29, Richer, AL-52, BRRI dhan49 and BRRI dhan-57 were evaluated. Highly significant variations were found among the advanced lines for all the characters studied. The tallest plant height was recorded from advanced line of AL-52. The longest panicle, maximum yield/rn2 and yield/ha were recorded from advanced NPT line AL-29, maximum number of unproductive tillers per plant and productive tillers per plant were recorded from I3RRl dhan-49 whereas the maximum number of empty grain per panicle was recorded from AL-36. All the lines showed significant positive correlation in case of plant height, panicle length and number of eflëctive tillers per plant with yield. Plant height showed highly significant and positive relationship with panicle length and 1000 grain weight. Maximum hulling (%) and milling outturn (%) were recorded from AL-36. Longest length of rough rice, milled rice and highest head rice recovery (%) were obtained from Richer. Grain breadth of rough rice and grain breadth of milled rice were highest in BRRI dhan-57. AL-52 showed the highest value in case of length/breadth ratio of rough rice, grain length of brown rice, length/breadth ratio of brown rice and length/breadth ratio of milled rice. Correlation coefficient analysis showed significant positive correlation between hulling and milling percent. In this study, maximum 5 lines had been grouped into long slender and one check (BRRI dhan-57) into medium slender. Among the six lines, all showed clear-cut translucent endosperm appearance. Richer showed the longest length and highest length/breadth ratio of cooked rice where checks showed lowest. AL-36 responded to maximum volume expansion where minimum volume expansion was recorded from AL-52 and BRRI dhan-57. Highest alkali spreading value was recorded from Richer and AL-52 which was in the range of ASV (4-6) that was intermediate alkali digestion and intermediate gelatinization temperature which was preferable to the consumers for it's medium cooking time.