Abstract
A field experiment was conducted comprising eighteen advanced lines of mustard in a randomized block design with three replication at Regional Agricultural Research Station, BARI, Hathazari, Chittagong during Rabi season (December 2009 to April 2010) for estimation of divergence among advanced lines of mustard. The genotypes were grouped into four clusters. Cluster I contained the highest number of genotypes (6) and the cluster III contained the lowest (3). The inter-cluster distances in all cases were larger than the intra-cluster distance which indicated that wider diversity was present among the genotypes of distant grouped. The highest intra cluster distance was observed in cluster II and the lowest in I. The highest inter cluster distance was observed between the cluster III and II followed by III and I and the lowest between cluster IV and III. Days to 50% flowering (81.94%), days to maturity (8.24%), plant height (5.82%), branches per plant (1.91%) and siliquae per plant (1.17%) contributed maximum towards the total divergence which suggested that these characters were highly responsible for genetic divergence in the present materials. But the highest cluster means for primary branches per plant and maximum seeds per siliquae with minimum seed yield per plant were obtained from the cluster II. The genotypes from cluster I had dwarf plant along with earliness in days to 50% flowering, days to maturity and maximum number of primary branches per plant. Therefore, the genotypes from cluster I and III could be utilized in the hybridization programme for getting desirable transgressive segregants and high heterotic response due to getting maximum yield along with short duration. Key words: Multivariate analysis; Divergence; MustardDOI: http://dx.doi.org/10.3329/bjpbg.v23i2.9322 Bangladesh J. Pl. Breed. Genet., 23(2): 29-34, 2010
Highlights
Mustard has been grown in the Indian sub continent for hundreds of years as an oil seed crop (Labana and Gupta, 1993)
Genetic diversity is the pre-requisite for hybridization programme to obtain desirable genotypes
To know the genetic diversity of the existing genotypes is essential before undertaking any crop improvement programme
Summary
Mustard has been grown in the Indian sub continent for hundreds of years as an oil seed crop (Labana and Gupta, 1993). Rape seed mustard crop account for almost 14 percent of the edible vegetable oil supply of the world demand (Kour and Singh 2004). The seed of rapeseed mustard contain 42% oil and 25% protein (Khaleque, 1985). The oil cake is used as a very good animal feed as well as fertilizer for better improvement of soil status because of its high biological protein value as well as source of calcium and phosphorus. Genetic diversity is the pre-requisite for hybridization programme to obtain desirable genotypes. To know the genetic diversity of the existing genotypes is essential before undertaking any crop improvement programme. The present study was carried out to estimate the nature and magnitude of genetic diversity present in a collection of 18 advanced lines of mustard
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