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Subject: Plant Breeding × Author: Soni Kumari × End date: 2006 × Start date: 2006 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Genetic divergence and correlation analysis in sunflower (Helianthus annuus L.)
    (CCSHAU, 2006) Soni Kumari; Sheoran, R.K.
    In the present investigation, 80 genotypes of sunflower were grown in randomized block design with three replications accomodating each genotype in 4 m long single row plot with row to row and plant to plant spacing at 45 cm and 30 cm, respectively, at the experimental research area of oilseeds section, Department of Plant Breeding, CCS Haryana Agricultural University, Hisar during spring season of 2005 with objective to determine variability, correlation path coefficient, genetic divergence, identification of genetically diverse and agronomically desirable germplasm and selection indices. Observations on five competitive plants for 12 metric characters were recorded. Substantial amount of genetic variability was observed for all the characters under study. The seed yield per plant showed positive and significant correlation with number of seeds per capitulum and 100 seed weight. The path coefficient analysis recorded that number of seeds per capitulum, 100 seed weight, plant height, palmitic acid, oleic acid and linoleic acid were the main contributors towards seed yield per plant. Based on D2 values, the genotypes were grouped into 10 clusters. There was little association between clustering pattern and agro-ecological distributions of genotypes. However, the genotypes of same agro-ecological origin had shown some tendency to come together in the same cluster. The genotypes included in clusters V, VIII, IX and X were identified as divergent as well as higher mean values for important yield component characters. The genotype viz. DRSF-120R, P70R, Nandyal-1 and RHA-586 were divergent and superior performers for most of the yield and quality attributing characters and could be exploited in future sunflower breeding programme. Combination of characters viz. number of seeds per capitulum and seed yield per plant was superior to straight selection for yield. Therefore, breeder engaged in the improvement of sunflower, should lay greater emphasis on this combination.