General , Specific Combining Ability Variance and Genetic Parameters for Diallele Cross of Sun flower[Helianthus annus L.]

	General , Specific Combining Ability Variance and Genetic Parameters for Diallele Cross of Sun flower[Helianthus annus L.]
journal of kerbala university
Article 1, Volume 7, Issue 3, 2011, Pages 425-434 PDF (0 K)
Abstract
A field experiment was conducted at the field of field Kefil region , Babylon . the half diallel was done among seven F3 selected genotypes of sunflower(Coban , Qudis – 3 , Flamme , Euroflore , Royal , Argensun and Iraqi flower) genotypes were tested for general and specific combining ability . during fall season 2006 crossed between F3 selected of seven genotypes and spring season of 2007 the genotypes and crosses were growing . to estimate some genetic features (gen action) and heritability and average of dominance degree. Some growth traits were estimated. Results reflected that 1 dominant genetic variation was higher of addition of genetic variation except for all the characters studied expect the number of days from sawing to harvesting , the weight of 1000 seed (gm) fertility percentage and oil percent heritability board sense all qualities ranged between lower percent (88.81%) for stem for stem girth and higher percent (99.77%) for the weight of 1000 seed . While the heritability narrow sense between lower percent (4.70%) for the leaf area and higher percent (91.86%) for oil content and dominance degree exceeded one , to indicate over dominance of some gen locations for all characters studied but fertility percent and oil content of the seed which gene values less than one , that indicate the presence of partial dominance gene action controlled on the fertility percent and oil content of the seed

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