Researchers at the Whitehead Institute have discovered a simpler way to enhance genetic variety in crops. For years, many food crops have faced a lack of genetic diversity due to centuries of selective farming. This limitation makes it challenging to grow plants that can withstand drought, extreme heat, or salty soils.
Traditionally, radiation has been one method to introduce new traits, but strict safety regulations and technical hurdles often prevent its use. Now, a recent study in the journal PLOS Genetics reveals a new technique involving etoposide, a drug usually used to treat cancer. This method alters plant genetics more efficiently.
When seeds are exposed to etoposide, it disrupts an enzyme tasked with organizing DNA as cells divide. During the repair process, DNA can scramble, resulting in significant genetic changes that are passed to the next generation. This method is straightforward, requiring only common lab materials.
Mary Gehring, a biology professor at MIT and one of the study’s leaders, commented on the surprising efficiency of this method. “The diversity of new traits you could see just by looking at the plants in the first generation was extensive,” she noted. In their experiments, about 66% of treated plants exhibited noticeable changes in leaf shape, height, and color.
Currently, the team is applying this technique to improve pigeon pea, a nutrient-dense legume vital for many in Asia and Africa. This crop could become a staple food source, but improving its varieties has been difficult because of its narrow gene pool.
Interestingly, this approach might also aid crops resistant to gene-editing methods like CRISPR. As Gehring highlighted, many plants in agriculture and horticulture are tough to genetically modify. Their ongoing trials on pigeon pea have already spurred the growth of two plant generations, assessing which can tolerate salty conditions.
While it’s still early days for this research, it holds promise for developing hardier crops that can withstand changing climate conditions.
Recent trends in agriculture focus on sustainability and resilience. According to a 2021 report by the Food and Agriculture Organization (FAO), enhancing crop genetic diversity can significantly improve food security in the face of climate change. As more research develops, it could revolutionize how we cultivate our food in the future.
For ongoing updates on this exciting research, follow sources like Phys.org and the FAO.
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