Three new Arkansas soybean varieties are nearing release, growers were told at the recent 75th anniversary field day of the Cotton Branch Experiment Station at Marianna.
The varieties, Ozark, Lonoke, and Desha, have attributes that may be attractive as part of many growers' programs, said Brian Cornelious, who discussed the station's soybean breeding and genetics program.
Ozark, he said, has been in Arkansas soybean performance tests since 2000 as numbered variety R96-209.
“It's an early Maturity Group 5 (5.2) cultivar, with high yield potential, good standability, and shattering resistance,” he said. It also offers resistance to several important diseases in the Mid-South, including southern stem canker, soybean mosaic virus, and frogeye leaf spot, with moderate resistance to root knot nematode and sudden death syndrome.
An three-year average of performance of early to mid-Maturity Group 5 soybean varieties at 17 locations showed Ozark ranking third in yield, at 54.3 bushels per acre.
Lonoke, also in Arkansas performance tests since 2000 as R95-2210, is a late Maturity Group 5 (5.7) cultivar, Cornelious said.
“It offers high yield potential, good standability, and shattering resistance.”
Disease resistance includes southern stem canker and soybean cyst nematode, with moderate resistance to phytopthora root rot, reniform nematode, sudden death syndrome, and frogeye leaf spot.
In three-year performance trials of mid- to late Maturity Group 5 soybeans at 17 Arkansas locations, Lonoke ranked seventh in yield, at 50.9 bushels per acre.
Desha, tested since 2000 as R92-1258, is an early Maturity Group 6 (6.2), Cornelious said, and offers high yield potential, good standability, and shattering resistance.
It is resistant to southern stem canker and soybean mosaic virus. In three-year trials of late Maturity Group 5 and early Maturity Group 6 soybeans at 17 Arkansas locations, it ranked fifth in yield, at 51.9 bushels per acre.
Cornelious said the Arkansas soybean program now has two Roundup Ready varieties “in the pipeline.” One is a Maturity Group 4 variety, the other an early Maturity Group 5. Both ranked high in state performance and research trials last year, he said. “All our best breeding material will be candidates for inclusion of the Roundup Ready gene.”
Arkansas' soybean breeding/genetics program “has grown tremendously,” Cornelious said, with the team now comprising 22 people. “We have a really strong program, which has been made possible in large part through soybean checkoff dollars. We are grateful to Arkansas growers for their support of these programs.”