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United States Department of Agriculture

Agricultural Research Service

An Improved Forage Grass for Cows / September 12, 1997 / News from the USDA Agricultural Research Service

Cow grazes in pasture of yellow-flowered birdsfoot trefoil: Link to photo information

An Improved Forage Grass for Cows

By Linda Cooke
September 12, 1997

Birdsfoot trefoil could be a big hit with farmers and livestock alike. Unlike alfalfa, this forage puts up with less-than-perfect soils. Also, it tolerates heavy grazing, it’s nutritious and cattle apparently find it tasty. The bad news: Birdsfoot trefoil is highly susceptible to root diseases.

Now scientists with USDA’s Agricultural Research Service have developed the first commercial variety of birdsfoot trefoil that resists root diseases. ARS and the University of Missouri released the new variety, called Steadfast, in 1995.

The secret behind Steadfast’s sturdiness is a wild birdsfoot trefoil found by ARS scientists in Morocco in the late 1980s. Steadfast has borrowed an important trait from the Moroccan trefoil: the ability to produce rhizomes, runners that enable the plant to spread to new sites. Rhizomes grow below the soil and can root to make new plants. Even if parts of the original mother plant succumb to disease, new plantlets that develop from rhizomes allow the plant to live and spread.

This new tool for survival should help the yellow-flowered Steadfast win fans in the U.S. farming community, which has been wary of birdsfoot trefoil in the past because of its disease susceptibility. Another plus for the new variety: It won’t cause bloating, the formation of excess gas in the grazing animal’s stomach.

The September issue of Agricultural Research magazine contains a story about the development of Steadfast from its Moroccan parentage to its distribution in the United States. The story can be viewed on the World Wide Web at:

http://www.ars.usda.gov/is/AR/archive/sep97/trefoil0997.htm

Scientific contact: Paul R. Beuselinck, ARS Plant Genetics Research Unit, University of Missouri, 207 Waters Hall, Columbia, MO 65211, phone (573) 882-6406, pbeuselinck@psu.missouri.edu.

Last Modified: 3/21/2014