Assertion : A gene from Bacillus thuringiensis is incorporated in plant genome to increase their yield. Reason : Bacillus thuringiensis has Bt toxin producing gene, which kills the larva of insects.

Step-by-step solution

Bacillus thuringiensis is a bacterium found in soil worldwide. Several strains can infect and kill insects. Due to this property, through genetic engineering, gene coding for insecticide is incorporated into plant genome. Plant having this gene are insect resistant thus high yielding e.g. Bt cotton is usually resistant to bollworm disease of cotton. It is the first genetically modified crop of India. This produces its own insecticide, as it contain a gene from soil bacterium Bacillus thuringiensis.