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Learn Introductory plant breeding with Braimy- B.Sc agriculture
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Additive variance: Arises of from difference between two homozygotes for a gene i.e. AA and aa. It is generally represented ‘d’

Dominance variance or Intra allelic interaction: It is due to the deviation of heterozygote (Aa) phenotype from the average of phenotypic values of the two homozygotes (AA and aa) it is represented by ‘h’.

Epistasis variance or Inter allelic Interaction: Results from an interaction between two or more genes represented by ‘e’.

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