Abstract:
Rice cultivar Jugal is a unique floral organ mutant from South Bengal and Odisa, the two sister states of Eastern India,
carries more than one kernels in most of its spikelet. Most of the mature florets of this line possess more than one carpal
which later developed into more than one kernels within a single grain on maturity. In order to study the role of floral organ
development genes commonly involved, expression study of five selected floral organ developmental genes (OsMADS3,
OsMADS13, OsMADS21, OsMADS58, and DL) were studied through real time based quantitative PCR for three con secutive flower organ developmental stages (Sp5, Sp6, and Sp7) with reference to a normal rice line (IR36). All the studied
genes showed differential relative expression in respect to the reference gene both in mutant and normal rice lines for the
studied genes and stages and individual distinct pattern except DL gene which was almost similar in both Jugal and IR36 at
early stage of floral organ development viz Sp5 and Sp6 stage. However, after Sp6 stage the expression is reduced in the
normal rice (IR36) but in case of the mutant rice (Jugal) the expression started to increase and at Sp7 the expression level
was much higher in the mutant line. The information resulted from the inves
