Abstract:
A field experiment was conducted during June 2012 to December 2012 to study the character
association and path analysis of 15 T. Aman rice varieties (Oiyza saliva L.) in randomized
block design with three replications. Analysis of variance for each trait showed significant
differences among the varieties. Phenotypic coefficient of variation (PCV) was also close to
genotypic coefficients of variation (GCV) for all the characters indicating maximum
environmental influence on the expression of these characters. High heritability associated
with high genetic advance in percent of mean was observed for plant height and thousand
seed weight which indicated that selection for these characters would be effective. Rice yield
per plant had highest significant positive correlation with Primary branches per panicle (0 =
0.709 and P = 0.520) which indicating that, if primary branches per panicle increase, grain
yield per plant increase. Path coeflicient analysis revealed that grain yield and filled grains per
panicle had the highest positive direct effect on seed. Hence, thrust has to be given for these
characters in future breeding programme to improve the yield in rice. Multivariate analysis
based on 10 agrononlic characters indicated that the 15 varieties were grouped into four
distant clusters. The inter cluster distance was maximum between cluster II and cluster IV.
The highest intra-cluster distance was found in cluster IV. From the results it can be
concluded that the following varieties viz., 08 (BRRI dhan40), 010 (BRRI dhan44). 011
(BRRI dhan46), 012 (BRRI dhan49) and 015 (BINA dhanl) may be suggested for future
hybridization pro&am
Description:
A Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfilment of the requirements
for the degree of
MASTER OF SCIENCE
IN
GENETICS AND PLANT BREEDING
