Field day features improved varieties, crop research

Aug. 21, 2013
Contact Information:

Shawn Clark, Resident Director, Pine Tree Research Station
870-633-5767, sdc01@uark.edu

Dr. Pengyin Chen, Professor, Crop, Soil and Environmental Sciences
474-575-7564, pchen@uark.edu

Fred Miller, Agricultural Communication Services
479-575-5647, fmiller@uark.edu

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john rupe, jared ford, eugene terhune

Plant pathologist John Rupe, left, diagnoses downy mildew disease in soybean samples brought to the Pine Tree Research Station field day by crop consultant Jared Ford, center, and Woodruff County agent Eugene Terhune.
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pengyin chen

Soybean breeder Pengyin Chen describes recently released soybean varieties from the University of Arkansas System Division of Agriculture during the Pine Tree Research Station field day.
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FAYETTEVILLE, Ark. — The University of Arkansas System Division of Agriculture has released two improved soybean varieties recently, and more are on the way, soybean breeder Pengyin Chen told visitors to a field day at the Pine Tree Research Station near Colt Aug. 15.

Field day participants saw the two new conventional soybeans, UA 5612 and UA 5213C, during tours of research plots. They also saw another conventional soybean, in the pipeline for release later this year, and two Roundup Ready varieties expected from the Division of Agriculture next year.

Visitors to the field day toured research plots where they heard first hand from Division of Agriculture scientists about the latest developments in crop breeding, disease and insect pest control, weed control, soil fertility and other agricultural research and extension programs. They also had opportunities to visit with division scientists about agricultural practices or problems.

UA 5213C, released by the division in July, is an early maturity group 5 soybean that's ready for harvest in mid to late October, Chen, director of the Division of Agriculture's soybean breeding program, told visitors. That times it well to follow rice harvest, he said.

In field trials, UA 5213C had yields akin to both conventional and Roundup Ready check varieties used for comparison, Chen said. In addition to its high yield, the soybean is resistant to major diseases, including southern stem canker and soybean cyst nematode race 3. It is susceptible to sudden death syndrome.

UA 5612, released in 2012, matures about 5 days later than UA 5213C, but offers even higher yields.

“The number one attraction of UA 5612 is its yield potential. It is consistently high yielding," Chen said. During evaluations within Arkansas from 2005 to 2011, the average yield was 62 bushels an acre. In variety tests in Arkansas and other southern states from 2008 to 2011, UA 5612 yielded 53 bushels an acre.

It is moderately resistant to southern stem canker, sudden death syndrome and soybean mosaic virus, Chen said. It is susceptible to root-knot nematode and soybean cyst nematode.

Both the new soybeans are widely adapted to the varying growing conditions in Arkansas and other southern states, Chen said.