Heterosis over standard commercial variety is

Solution(By Examveda Team)

Heterosis over standard commercial variety is Economic heterosis.
Heterosis, hybrid vigor, or outbreeding enhancement is the improved or increased function of any biological quality in a hybrid offspring. An offspring is heterotic if its traits are enhanced as a result of mixing the genetic contributions of its parents.
Economic heterosis is the only estimate of heterosis, which is of commercial or practical value in 1944. Powers suggested that, the term heterosis should be used only when the hybrid is either superior or inferior to both parents.