CHARACTERIZATION OF SOME ADVANCED LINES OF AMAN RICE (Oryza sativa L.) FOR RELEASE AS VARIETY

Abstract

The investigation was carried out under field conditions to characterize thirteen advanced lines of aman rice during the period of aman season 2017 at the experimental field of Sher-e-Bangla Agricultural University, Dhaka. These thirteen advanced lines of aman rice were characterized for fifteen qualitative and nineteen quantitative traits. All the genotypes were characterized and categorized as Biodiversity international, IRRI and WARDA. 2007. Among the qualitative characteristics no variation was observed for basal leaf sheath color, leaf blade pubescence, ligule shape and all the genotypes were green, pubescent, 2- cleft type respectively. All the genotypes were lodging resistance. Only two types of ligule and auricle color viz. whitish and yellowish green were found. Among thirteen genotypes ten genotypes viz. (G01, G05, G06, G07, G08, G09, G10, G11, G12 and G13) had well exerted type panicle. Only G08, G09 and G12 were partly awned and G11 was fully awned. Among the quantitative characteristics no variation was observed in case of grain length and grain width and all the genotypes had similar type extra-long (9.10mm) and fine (1.76mm) width grain. Average culm length was 110.24 cm and G06, G09 and G10 showed intermediate to long type’s culm length. Genotype G11 showed the highest tiller number as well as effective tillers per hill (21.1 culms and 20.53 culms respectively). Long panicle length with higher number of grains per panicle which were the agronomic superiority. The average panicle length was 27.17 cm and mean total grain was 175.15 per panicle which contributed to an average yield of 35.5 g per plant. G05 showed the highest yield but there were no significant difference among the genotypes G01, G05, G08 and G09 and G11 showed short maturity duration.