Rice farming has long been defined by a grueling annual cycle: till the field, sow the seed, and repeat. But by "awakening" a dormant trait from the plant's wild ancestors, Chinese scientists have developed a new breed of rice that behaves more like a permanent orchard.

While modern cultivated rice is an annual that dies after a single harvest, its wild ancestors were hardy perennials. To bridge this gap, plant geneticists Han Bin and Wang Jiawei from the Chinese Academy of Sciences' Center for Excellence in Molecular Plant Science teamed up to identify the genetic mechanism that allows ancient plants to survive the winter and regrow from their own roots. Their research, recently featured in the journal Science, identifies a specific genetic region dubbed EBT1 as the biological master key to this longevity.

By "silencing" the signal to age, the EBT1 region allows the rice to remain in a youthful, vegetative state, enabling the plant to bypass the typical death cycle and regrow from its base year after year.

Technically, all rice plants possess a brief "second life" known as ratoon rice, but in typical farming, this regrowth is far too weak to sustain full-scale operations. To maximize this trait, the researchers developed a remarkably prolific line dubbed G43. While standard annual rice might produce only a dozen secondary tillers, the G43 variety produced roughly 70. By combining EBT1 with two known prostrate growth genes, the team successfully created "wild-like" plants that can survive for at least two years in field environments such as Hainan.

This research deepens our understanding of the evolution of plant life-history strategies and provides vital genetic resources for improving perennial rice varieties. As Moto Ashikari, a plant geneticist at Nagoya University, noted: "This provides a compelling proof of concept that annual crops might be converted into perennial crops through genetic approaches."