Parasexual hybridization means

Explant is required to be disinfected before placing in culture. This is done by

In maize, hybrid vigour is exploited by

Which of the following statements is not true about somatic embryogenesis?

Assertion : In case of vegetatively propagated crops, pure-line selection is not required.

Reason : Hybrid vigour is mostly used in vegetatively propagated plants.

Vavilov's centres of origin of crop plants are located in