Question

Lysine rich maize variety is

• A. Protina
• B. Rattan
• C. Shakti
• D. All of the above

Answer 1

The correct option is D All of the above

Maize is thymine rich whereas lysine and tryptophan deficient cereal. Germplasm composites are the genetic complexes, that serve as a reservoir of superior genes. The opaque-2 maize composite varieties namely, Shakti, Rattan, and Protina were produced by 'All India coordinated maize improvement project' and were released for commercial production in 1971.

The recessive mutant allele of an opaque-2 gene, that code for the leucine zipper transcription factor, causes the increase in lysine and tryptophan content in the grain. The encoded transcription factors bind to the promoters of zein proteins, which in turn determine the amino acid balance in the grain. Thus, the correct answer is option D.