Interrelationship and Cause - Effect of Morphological Traits with Grain Yield and Oil Content among Indian Mustard (Brassica juncea L. Czern & Coss) Genotypes under Non- irrigated and Irrigated Condition

Water scarcity is a venomous upshot of climate change and is one of the sternest factors restraining
global crop productivity. In order to study association and cause-effect of shortage in irrigation on
some morphological and quality traits on yield, an experiment accommodating 20 genotypes of Indian
mustard (Brassica juncea L. Czern & Coss), was conducted in Randomised Complete Block Design
(RBCD) from various Rapeseed & Mustard centres located across country, randomly in three
replications during Rabi 2016-17, one condition subjected to drought (devoid of irrigation) inside the
Rainout shelter under residual moisture condition and another situation with normal irrigated field
condition at research farm of Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur.
Genotypic correlations for grain yield and other characters were invariably higher than phenotypic
correlations indicating indicated less influence of environment. Earliness in flowering (-0.010; -0.256)
and maturity (-0.335; -0.185), Secondary branches per plant (0.267; 0.169), Siliqua on primary mother
axis (0.162; 0.079), Length of primary axis (0.006; 0.275), Siliqua density (0.244; 0.189) and
Biological yield (0.444*;0.411*) also had shown positive correlation with grain yield per plot at
phenotypic level under both non- irrigated and irrigated condition indicated that improvement in these
morphological parameters indicated genotypes with early flowering and maturity coupled with more
secondary branches with more siliqua accommodated by longer primary mother axis with increasing
density of siliqua along with high biological yield and will ultimately enhance the grain yield.