RAZENDRA NATH ROY1, MD. SIRAZUL ISLAM2, M. M. ISLAM3*, M. KAMRUZZAMAN4 and M. I. HOQUE5
1Upazilla Agriculture Officer, Department of Agricultural Extension, Monohorgonj, Comilla, 2Upazilla Agriculture Officer, Department of Agricultural Extension, Dinajpur Sadar, Dinajpur, 3Senior Scientific Officer and 4&5Scientific Officer, Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh, Bangladesh. *Corresponding author’s Email: siraz1372@gmail.com
ABSTRACT
A field experiment was conducted at the experimental field, Department of Genetics and Plant Breeding, Faculty of Agriculture, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh during (Kharif season-2) July to December, 2016 to study variability, heritability, floral biology, correlation, path coefficient analysis provided 30 genotypes of fine rice. The study revealed that significant variation obtained only for genotype for the character days to 50% flowering and days to maturity. On the other hand, variation found both for genotype and environment for the character sterility (%) and 1000 grain weight. Panicle length (cm) and spikelet’s per panicle were highly heritable characters. Spikelets per panicle, plant height (cm) was highly environmentally influenced character while grain length breadth ratio had less influence by the environment. The characters fertile pollen, sterile pollen, pollen fertility (%), spikelet fertility (%), period of blooming and starting of an thesis showed significant and positive correlation with grain yield/ha (t). Path coefficient analysis suggested that spikelet fertility (%) and pollen fertility (%) contributed maximum to grain yield having positive direct effect. Highest spikelet fertility was found for genotype FR30 (Motamota) followed by FR4 (Badshabhog), FR29 (Shitabhog).Varieties seemed to be highly successful rate to out yield were FR4 (Badshabhog), FR29 (Shitabhog), FR23 (Boldar) and FR3 (Zira). The maximum period of blooming were noted in FR20 (Darkashail) and FR24 (Lalchicon). Statistically more or less alike varieties were FR12 (Amur) and FR6 (Philippine katari); FR16 (Chinigura) and FR26 (Shadamota). The highest yield (3.80t/ha) was obtained in FR23 (Boldar).
Keywords: Fine rice, Correlation, Path analysis, Floral biology and Euclidean distance.