India is the second world largest populated country in the world.So we needs to fulfill the hunger need of the population.Brassica is commercial crop for the oil production.Studies on D square analysis in mustard (Brassica juncea) has been undertaken to integrate the genetic variability, heritability, genetic advance, correlation, path analysis and genetic divergence, so that better results may be obtained on yield and other contributing characters.

The author of this work was born on 30th June, 1986 Aligarh (U.P.). He did his High School and Intermediate examination from Central Academy School, Jodhpur(Raj.), CBSE board. He did B.Sc. and M.Sc (Biotechnology) from C.C.S.University, Meerut(U.P.) with 1st division.Done Ph.D (Agriculture Biotechnology) from S.V.P. University of Agri. & Tech., Meerut.