Abstract:
.A held experiment was conducted with 36 rice genotypes at the experirneinal
farm of Sher-e-I3angla Agricultural University. Dhaka to study the
characterization and genetic diversity analysis in rice (O;y:a saliva I..) during
November 2005 to May 2006. Signihicant variation was observed among all the
genotypes for all the characters studied. Considering genetic parameters high
genotypic coefficient of variatioli (GCV) was observed for spikelet sterility %
followed by eflèctive tillers per plant, total tillers per plant and grain yield per
plant, whereas days to 50% flowering showed very low GCV. High heritzthility
with low genetic advance in percent of mean was observed for days to 50%
flowering which indicated that non-additive gene effects were involved for the
expression of this character and selection for such trait may not be rewarding.
High heritability with moderate genetic advance in percent of mean \vas
observed lix plant height indicated that this trait was tinder additive gene
control and selection for genetic improvement for this trait would he eilèctive.
Ditièrent multivariate analysis techniques were used to classift 36 rice
genotypes. All the genotypes were grouped into live clusters. Principal
component analysis, principal coordinate analysis, canonical variate analysis
gave similar result. Cluster I had maximum (12) and both cluster Ill & IV had
mini num (2) number of genolypes. The highest intra-cluster distance was
found in cluster 1 and the lowest in cluster IV among five clusters. The highest
inter-cluster distance was observed hetwcen cluster I and IV and the locst
between cluster II and III. The characters- effective tillers per plant. 1000-grain
weight and harvest index contributed maximum towards divergence among the
rice genotypes. Considering genetic diversity and other agronomic performance
the genotypes (110. 023 and (336 from cluster 1 (312. GIG and 033 li'oni
cluster Il: 031 from cluster Ill and 021. 022 from cluster IV niktht be selected
as gmn .
