International Journal of Agricultural Science Research Vol. 3(8), pp. 141-156, August 2014 ISSN 2327-3321 ©2014 Academe Research Journals

Full Length Research Paper

Genetic diversity analysis of mustard germplasm based on phenotypic traits for selection of short duration genotypes

Md. Shahin Iqbal¹, Md. Shamiul Haque¹, Dr. Ujjal Kumar Nath¹ and Islam Hamim²

¹Department of Genetics and Plant Breeding, Bangladesh Agricultural University, Mymensingh, Bangladesh.

²Department oBangladesh f Plant Pathology, Agricultural University, Mymensingh, Bangladesh.

*Corresponding author. E-mail: shahinsarvi@gmail.com.

Accepted 14 July, 2014

Abstract

The present research was undertaken to determine the genetic variability and diversity among different mustard genotypes, to estimate the Genotype-environment (G×E) interaction in yield and yield contributing characters of mustard genotypes to select short duration mustard genotypes. The experiments were carried out at the experimental farm of the Department of Genetics and Plant Breeding, Bangladesh Agricultural University, Mymensingh, Bangladesh during the period of 2011-2012 and 2012-2013. Analysis of variance demonstrated significant variations for all the characters studied among the genotypes. In case of genotype-environment interaction, it was found that (G×E) interaction was non-significant for number of siliqua plant^-1, 1000 seeds weight and days to maturity among the studied parameters for different genotypes of mustard. Among the genotypes, BARI Sarisha-15, BINA Sarisha-4 and BARI Sarisha-14 were found suitable for cultivation across all the environments under study, while other genotypes varied in performance especially in days to maturity and seed yield plant^-1. BARI Sarisha-8, Tori-7 and NAP-0763 were found to be more sensitive to environmental fluctuations. All the characters demonstrated high heritability (˃80%) irrespective of any genotypes. Plant height, number of seeds siliqua^-1, number of siliqua plant^-1 and length of siliqua were significantly correlated with seed yield plant^-1 suggesting that genotypes with high partitioning efficiency gave increase in seed yield plant^-1.  Among the characters, number of siliqua plant^-1, number of seeds siliqua^-1 and 1000 seeds weight had high positive direct effects on grain yield plant^-1 so those characters should be included owing to importance in selecting the genotypes for higher seed yield in mustard. Using Euclidean distance following Ward’s method, the genotypes were grouped into four clusters. The cluster III had higher intra cluster distance and the maximum inter cluster distance was observed between genotypes of clusters I and IV followed by clusters III and IV.

Key words: Mustard, genotype-environment interaction, heritability, co-relation of coefficient, path analysis, diversity analysis.