With reference to agriculture in India, how can the technique of ‘genome sequencing’, often seen in the news, be used in the immediate future?

1. Genome sequencing can be used to identify genetic markers for disease resistance and drought tolerance in various crop plants.
2. This technique helps in reducing the time required to develop new varieties of crop plants.
3. It can be used to decipher the host-pathogen relationships in crops.

Select the correct answer using the code given below:

Correct Answer: 1, 2 and 3

Genome sequencing involves determining the entire DNA sequence of an organism's genome. In the context of agriculture in India, this biotechnology tool offers significant advancements for crop improvement and disease management.

Breakdown of the Statements:

1. Identification of Genetic Markers: Genome sequencing allows scientists to identify specific genes and genetic markers associated with desirable traits such as drought tolerance, salinity resistance, and disease resistance. This information is crucial for marker-assisted breeding to develop climate-resilient crop varieties. Hence, statement 1 is correct.

2. Reduction in Breeding Time: Traditional plant breeding methods can take many years to develop and test new crop varieties. By utilizing genomic selection and marker-assisted selection enabled by genome sequencing, breeders can identify target traits early in seedlings without waiting for mature plant phenotype expression. This drastically speeds up the breeding process. Hence, statement 2 is correct.

3. Deciphering Host-Pathogen Relationships: Sequencing the genomes of both the host crop plants and their pathogens (such as fungi, bacteria, or viruses) helps researchers understand how pathogens infect crops and how plants defend themselves. This insight is key to engineering targeted disease-resistance strategies. Hence, statement 3 is correct.

Since all three statements accurately describe the immediate future applications of genome sequencing in Indian agriculture, the correct option is 1, 2 and 3.