COMPARATIVE STUDY OF MORPHO-PHYSICO-CHEMICAL TRAITS OF 27 F LINES OF BORO RICE (Oryza Sativa L.) AGAINST 2 CHECK VARIETIES 6

Abstract

The experiment was conducted at the experimental Farm, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka, Bangladesh during December 2014 to May 2015. Twenty seven selected Boro rice lines and two check varieties were evaluated. Highly significant variations were found among the advanced lines for all the characters studied. The genotypes G7, G4 and G12 taken lower days to 50% flowering than the two check varieties. The highest total tillers per plant and effective tillers per plant were recorded from G25. The highest panicle length, yield per plant, yield per hectare were recorded from G8. The highest secondary branches per panicle, total number of spikelets and number of filled grains were found from G14. Maximum thousand seed weight was recorded from G6. The highest length of rough rice was found from G24. The genotype G5 has shown the highest value in breadth of rough and uncooked rice. The highest value in L/B ratio of rough and uncooked rice was found in G27. Maximum hulling (%), milling outturn (%) and head rice recovery (%) were recorded from G13, G2 and G10 respectively. In this study, ten lines are classified as long slender grains, twelve lines and two check varieties (BRRI dhan-28, BRRI dhan29)

are classified as medium slender, three lines are long bold and two lines are short bold grains. Maximum volume expansion (%) and water absorption (%) were recorded from G8 and G20, respectively. The genotype G3 has shown the highest kernel elongation ratio and alkali spreading value, which was in the range of ASV (7.00) that was high alkali digestion and low gelatinization temperature. The genotype G15 has shown the maximum amylose content. Maximum protein content was found in the genotypes G20, G22 and one check variety (BRRI dhan29).