Abstract :
The present study aimed to estimate the type of gene actionof the different flax traits including technical plant length, number ofcapsules/plant, seed yield/plant besides oil content and fatty acid compositionof the oil from genetic study of six populations, i.e., P1, P2,F1, BC1, BC2 and F2 of the cross between Egyptian cultivar, Giza-8and the Netherlandish cultivar, Viking through 1998/1999 to 2002/2003 seasons at Alexandria, Egypt. Significant genetic variance wereshowed for the studied traits. Additive genetic variance contained themajor component in the inheritance of seed yield and number of capsules/plant while both additive and dominance variance were significantlyequal in technical plant length inheritance. Oil content andlinolenic fatty acid were genetically controlled by additive gene effectwhile palmitic, stearic, oleic and linoleic acids are genetically controlledby dominance gene effect. Heritability estimates (broad-sense)were 91.72, 76.75, 71.33 and 87.97% for seed yield/plant, number ofcapsules/plant, technical plant length and oil content, respectively. Forfatty acids, heritability estimates (broad-sense) were 69.40, 83.09,92.80, 85.38 and 89.60%, respectively. In narrow-sense, heritabilityestimates were 83.65, 57.79, 37.28 and 75.00% for seed yield/plant,number of capsules/plant, technical plant length, and oil content, respectively,while for fatty acids composition were 22.70, 26.67, 32.04,32.28 and 56.36% for palmitic, stearic, linoleic and linolenic acids respectively.As, for the predicted gain from selection, the values were93.05, 35.95, 10.90, 10.32, 7.72, 90.01, 13.48, 11.04 and 25.52% forseed yield/plant number of capsules/plant, technical plant length, oilcontent, and fatty acids, i.e., palmitic, stearic, oleic, linoleic and linolenic,respectively.
Keywords :
Flax , Genetic variance , Additive , Dominance , Heritability , Gain from selection , Fatty acids
