INV1 — Solanum tuberosum

Summary

PGSC0003DMG400013856, designated INV1 and also known as PAIN or Pain-1, is a potato gene on chromosome 3 that encodes a beta-fructofuranosidase with 6G-fructosyltransferase activity, belonging to the Glyco_hydro_32 family. In potato, INV1 is associated with cold-induced sweetening, chip color, and tuber starch content. The gene is associated with a wide range of biological processes including sucrose breakdown and anabolism, fructose anabolism, phloem unloading, vacuolar localization, and the stringent response. It is linked to numerous agronomic traits such as reducing sugar and hexose content, starch yield, amylose content, fruit volume and size, net photosynthetic rate, water use efficiency, drought tolerance, and root length. Studies of related genes in other species link the family to acid invertase activity, fruit fresh weight, and carbohydrate content.