Journal
JOURNAL OF HEREDITY
Volume 101, Issue 5, Pages 657-660Publisher
OXFORD UNIV PRESS INC
DOI: 10.1093/jhered/esq043
Keywords
capsule; epistasis; gene effects; joint scaling test; morphine content; straw yield
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Four single crosses (VG20 x SGE48, SGE48 x SG35II, VG26 x SG35II, and SG35II x VG20) in opium poppy (Papaver somniferum L.) were analyzed to study the gene actions involved in the inheritance of quantitative traits, namely plant height, branches/plant, capsules/plant, peduncle length, capsule index, stigmatic rays, straw yield/plant, and morphine content. Simple additive, dominance, and epistatic genetic components were found to be significant for inheritance pattern. Dominance effect (h) was higher than additive effect (d). Digenic interaction indicated the prevalence of dominance x dominance (l) followed by additive x dominance (j) type epistasis. The significance of dominance (h) and dominance x dominance (l) indicated duplicate epistasis for all the traits and crosses except SG35II similar to VG20 for stigmatic rays. Biparental mating followed by recurrent selection involving desired recombinants may be utilized to improve the component traits.
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