Which substances are found in double the amount in hybrid maize varieties?

When two unrelated individuals or lines are crossed, the performance of the $F_1$ hybrid is often superior to both parents. This phenomenon is called .......

Which variety is used as a donor for improving wheat crops?

In hybrid maize varieties,which of the following elements have been found to have double the amount compared to existing maize varieties?
$(i)$ Lysine
$(ii)$ Alanine
$(iii)$ Tryptophan
$(iv)$ Proline
$(v)$ Histamine

Identify the $WRONG$ match of the crop variety and its resistance to pest or disease.

Resistance to.......... in $Abelmoschus esculentus$ was transferred from a wild species and resulted in a new variety of $A$. esculentus$ called $Parbhani Kranti.