Q: In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.
Borlaug received his B.Sc. in Forestry in 1937 and Ph.D. in plant pathology and genetics from the University of Minnesota in 1942. He took up an agricultural research position in Mexico, where he developed semi-dwarf, high-yield, disease-resistant wheat varieties. During the mid-20th century, Borlaug led the introduction of these high-yielding varieties combined with modern agricultural production techniques to Mexico, Pakistan, and India. As a result, Mexico became a net exporter of wheat by 1963. Between 1965 and 1970, wheat yields nearly doubled in Pakistan and India, greatly improving the food security in those nations.
A:
who was the american plant breeder responsible for dramatically improving crop yields in the 1960s