Will genetic engineering divert us from essential food production science?

Climate change, increasing population, greater demand for animal products, and the un-sustainability of current food production: All will challenge our ability to produce enough food in coming decades. Already there is evidence that climate change has reduced crop yields.

But the good news is that we already have many of the tools that we need to respond.

Tom Philpott at Mother Jones highlights a peer-reviewed article showing that small Mexican maize farmers have an important piece of the answer to these challenges.

The article suggests that there is a lot of genetic diversity in corn grown on traditional small Mexican farms that will allow food production there to adapt to climate change. Genetic diversity provides the building blocks of crop adaptability—the inherited differences between plants that is evolution’s way of allowing survival in changing environments.

The value of crop genetic diversity goes way beyond Mexican maize fields. Other scientists have documented large amounts of untapped genetic diversity in the world’s major crops wherever they have looked, such as in wheat and cassava. Breeders can use this, along with diversity found in wild species related to crops, to adapt our crops to climate change and to increase productivity.

When coupled with ecological farming principles that increase resilience in the face of drought, flood and rising temperatures, breeding can go a long way toward providing enough food sustainably by mid-century. For example, organic and similar practices build soil organic matter–this allows soil to hold more water which can help during drought. And breeding is already having success in developing drought tolerant rice, corn, and other crops, flood tolerant rice, many types of pest resistance, improved nutrient content, and much more.

Engineered Omissions

Given all the evidence, it is perplexing that some scientists still want to put too many of our eggs in the genetic engineering (GE) basket. Currently, that basket looks pretty empty, with only a few crops resistant to herbicides and a few types of pests.

For example, Nina Federoff seems unaware of the potential of breeding, and the advances already being achieved through these scientifically sophisticated methods. In an op-ed in the New York Times, “Engineering Food for All” the former Bush-appointed Science Adviser to the Secretary of State lauds the wonders of crop genetic engineering, while tagging breeding as an “older” method that is “less capable”.

In a more blunt assessment during a public forum that I participated in at Dartmouth College several months ago, Federoff declared that crop breeding had run its course, and implied that GE was now our last best hope. She could not have been more wrong. The only way one can come to such conclusions is by omitting or overlooking loads of important science.

Most of the benefits from GE extolled in the op-ed are modest at best. They only seem impressive if you don’t compare them to the successes and potential of agroecology, agronomy, or breeding—which continue to achieve far more than GE. When looked at side-by-side, GE often pales by comparison to breeding.

more at the link.