CHARACTERIZATION OF F6 LINES OF AUS RICE (Oryza sativa)

Abstract

The present study entitled “Characterization of F6 lines of Aus rice (oryza sativa)” was conducted at experimental farm, Department of Genetics and Plant Breeding, Sher-e-Bangla Agricultural University, Dhaka during Aus 2017. This study was carried out to characterize advanced Aus lines based on morphological qualitative and quantitative traits. Boro rice requires large amount of underground water that is not feasible for future rice cultivation. So, present research was undertaken to fulfill the DUS test requirements of Aus rice advanced lines to cultivate with rain water where underground water can preserve. A total of eight lines of F6 generation of Aus and Boro rice cross. The experiment was conducted in randomized complete block design with three replications. BRRIdhan43 and BRRIdhan55 were used as check variety in this experiment for comparison. Thirty seven qualitative and quantitative morphological traits were used to characterize Aus rice. The traits viz., leaf pubescence, shape of the ligule, attitude of the blade of flag leaf, days to heading, days to maturity, 1000-grain weight, grain length (without dehulling), sterile lemma length, decorticated grain length (after dehulling), decorticated grain shape, culm length, panicle length and no. of effective tiller per plant showed the most variation among the genotypes. Genotypes G2 (26 x 28 S1P7P2S1), G4 (26 x 28 S1P7P2), G6 (21 x 36 S1P4P1S1) and G8 (26 x 28 S1P7P2) had early time of heading and medium type of culm length. The genotypes G2, G4, G6 and G8 produced early maturity. Five genotypes viz. G2, G4, G6 and G8 were observed to produce more effective tiller per plant (>10). The information obtained would be produced very useful in identification and selection of suitable genotypes for use in future breeding programmes.