They found a gene responsible for monophagous feeding preference, and changed this preference via mutating gene!
Very interesting study!
Bombyx mori predominantly feeds on fresh mulberry leaves. Authors describe GR66 gene as being responsible for that. When they mutated GR66 via CRISPR/Cas9, silkworms had the ability to feed many plant species including fresh fruits and grain seeds.
So, eating habits can change? and they are linked to our genes? WOW.