Question

India's wheat yield revolution in the 1960s, was possible primarily due to

• A. Hybrid seeds
• B. Increased chlorophyll content
• C. Insertion, resulting in plant height reduction
• D. Quantitative trait mutations

Answer 1

The correct option is C Insertion, resulting in plant height reduction

Quantitative traits refer to phenotypes (characteristics) that vary in degree and can be attributed to polygenic effects, i.e., product of two or more genes, and their environment. Here quantitave trait mutation means high yielding varieties which provide quantity to the crop production.
The "green revolution" began in the 1960s, but it's confirmed that it began in 1953 through the introduction of high-yield crop varieties and application of modern agricultural techniques, and led to an increase in food production in India.

The main development was higher-yielding varieties of wheat by insertion which resulted in plant height reduction, were developed by many scientists, including American agronomist Dr. Norman Borlaug, Indian geneticist M. S. Swaminathan, and others. They used Rht gene from Norin10 for height reduction of the plant.

So, the correct answer is option C.