Abstract:
The experiment was conducted in the experimental field of Sher-e-Bangla
Agricultural University, Dhaka during October, 2017 to April, 2018. The objective
of this study was to assess the genotype and environment interactions for yield and
yield contributing characters of mustard varieties grown in Bangladesh through the
AMMI (additive main effects and multiplicative interaction) model. The study
comprised of eleven (11) mustard varieties of Brassica rapa released by BARI and
BINA and three (3) environments laid out in randomized complete block (RCBD)
design with three replications. The environments were three sowing times viz.,
optimum (Env-1), late (Env-2) and very late (Env-3) sowings of eleven mustard
varieties. The results of combined analysis of variance (ANOVA) revealed
significant differences between genotypes and environments as main effects.
Genotype and environment interactions both linear and non-linear components
were highly significant for most of the parameters except number of seeds per
siliqua and hundred seed weight. The results also suggested that Env-3 was poor
and Env-1 and Env-2 were found rich and favorable for mustard production. The
IPCA1 (First Interaction Principal Component Axis) scores of a genotypes in the
AMMI analysis used as an indication of the stability or adaptation over
environments. The greater the IPCA1 scores indicated the better adaptation of a
genotype to certain environments. Hence, considering the IPCA1 scores BARI
Sharisha-9, BARI Sharisha-15, Maghi and Improved Tori were low yielding and
unstable, while BARI Sharisha-6, BARI Sharisha-17 and BINA Sharisha-9 were
shown high yielding but unstable genotypes. Again, Env-1 was found as rich
environment where, BARI Sharisha-17, BINA Sharisha-9 were shown highly
responsive to the environment (Env-1). BARI Sharisha-12 was found intermediate
yielding and stable variety. As a whole, Sonali Sharisha-75 and BINA Sharisha-10
were found as high yielding and stable varieties and Env-1 and Env-2 were more
favorable for the mustard production.
Description:
A Thesis
submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
GENETICS AND PLANT BREEDING
SEMESTER: JANUARY – JUNE, 2018
