Mapping millet genetics                         

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Read the full article in by Adityarup Chakravorty PC: Santosh Rajput

Proso millet growing in western Nebraska, which is believed to have been one of the earliest domesticated crops. It’s grown in the developing world as a food source and in the U.S. and Europe for forage and bird seed.

In the semi-arid tropics of Asia and Africa, conditions can be difficult for crops. Plants need to have short growing seasons, survive on poor soils and tolerate environmental stresses.

Close to 97 percent of millets grown worldwide are produced in developing countries. Millets are a diverse group of cereal crops. Importantly, they generally have high nutritional content.

“However, millets have been largely overlooked by modern genetics research,” says Matthew Johnson, a researcher at the University of Georgia. In a new study, Johnson, along with colleagues in India, have generated some of the first genetic resources for three different varieties of millets.

As genetic resources are created for less-studied crops, researchers can better leverage the genetic diversity within the crop family. This can lead to the development of new varieties of crops.

“Our results will give researchers tools to develop better millet varieties for farmers,” says Johnson.

Most farmers who grow millets are smallholders (farming less than five acres). Millets are crucial for their livelihood. That’s because they can grow on marginal lands and need less water than most crops.

“Millets also grow much quicker than most other major crops,” says Johnson. That’s important because farmers can plant millets if weather or natural disasters cause initial plantings to fail.

“So, with millets, the farmers can at least get some harvest,” he says.

Johnson’s team sequenced and analyzed DNA from three species of millets—kodo, little and proso. “These are three crops that have had relatively few resources developed for them,” Johnson explains.

The plant source materials were obtained from the International Crops Research Institute for the Semi-Arid Tropics in India. The researchers’ goal was to better understand the genetic diversity within and between each variety of millet. “Understanding this diversity is an important step in developing better varieties of the crop,” says Johnson.

They uncovered tiny differences in the DNA sequences of the various plants. These genetic differences may ultimately be connected to characteristics, such as drought tolerance and growth rate.


Posted on

October 24, 2019

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