2011 Ohio Soybean Performance Test

O H I O S O Y B E A N

P E R F O R M A N C E T R I A L S

2011

Chris D. Kroon Van Diest, Research Associate, Dept. of Horticulture & Crop Science

Mark Sulc, Professor, Dept of Horticulture and Crop Science

John McCormick, Research Associate, Dept. of Horticulture & Crop Science

Anne Dorrance, Professor, Dept. of Plant Pathology

The Ohio State University, College of Food, Agriculture and Environmental Science

Ohio State University Extension and OARDC

Edzard van Santen, Professor, Dept. of Agronomy & Soils, Auburn University

The purpose of the Ohio Soybean Performance Trials is to evaluate soybean varieties for yield, and other agronomic characteristics. This evaluation gives soybean producers comparative information for selecting the best varieties for their unique production systems.

The entries for each test site were planted in a randomized complete-block design. Each entry was replicated four times and planted in plots 40 ft. long and 5 ft. wide containing four rows seeded at 140,000 seeds per acre.

Entries in Trials. Performance of entries in The Ohio Soybean Performance Trials are published if seed will be available to Ohio soybean producers for the following planting season. All 2011 entries were submitted voluntarily by seed companies and the Ohio Seed Improvement Association. Entry fee charges were paid per entry and location.

Test by Type. Varieties are grouped, tested and analyzed by type and maturity. All normal and Liberty Link varieties are tested as a group. Roundup Ready varieties are tested in two groups (early and late) based on maturity. The same production, testing and evaluation techniques, except for weed control, were used for normal tests and Roundup Ready tests. The performance of normal & Liberty Link entries and Roundup Ready entries is not comparable statistically because they were not tested and analyzed together. Varieties should only be compared within a test group not between test groups.

Relative Maturity. Relative maturity is a rating designed to account for all of the factors that affect maturity date and includes variety, planting date, weather, latitude and disease. Maturity is defined as the “95% brown pods” stage. A variety with a Relative Maturity rating of 3.5 will reach the 95% brown pod stage 5 days later than a variety with a rating of 3.0. The varieties in each table were tested as a group, and their performance analyzed and reported for that group.

Yield. Each soybean variety was harvested when the moisture content was between 8 and 12 percent and

Protein and Oil %. Analysis was determined by near infrared transmittance technology. The test was performed by the OSU Grain Quality Lab using a Tecator Infratec whole grain analyzer calibrated with the Composition Systems Calibration developed at Iowa State University and is reported at 13% moisture.

Phytophthora Resistance Genes. Phytophthora resistance genes were determined using a hypocotyl inoculation test. In this test, several races of Phytophthora are used to determine the presence or absence of a particular Rps gene. The Rps genes (Rps1a, Rps1c, etc.) detected in a variety are listed in Tables 3-8. "ND" indicates that the Rps gene(s) could not be determined, and the variety has Rps6, Rps8 or a Rps gene combination of either 1c+3a or 1k+3a. "None" indicates no Rps genes were detected. See Table 12 for this information. See Table 12 for this information.

Phytophthora Partial Resistance. All varieties were evaluated for partial resistance. Partial resistance is a multigenic characteristic that provides some level of protection against all known races of Phytophthora. Ratings of 3.0 to 3.9 are considered high levels of partial resistance and will provide good levels of control. Ratings of 4.0 to 4.9 are considered moderate and will allow some yield loss when environmental conditions favor infection by Phytophthora. Ratings of 5.0 to 5.9 indicate low levels partial resistance or protection against Phytophthora. Ratings of 6.0 and greater indicate very low levels and severe yield losses will result when Phytophthora pressure is high. For fields with a history of Phytophthora root and stem rot, varieties should have a combination of both an Rps gene plus good partial resistance to provide the best protection.

LSD. A Least Significant Difference (LSD) for yield was computed for each maturity group. LSD's are reported in bushels per acre at 13 percent moisture. Yields of two varieties within a maturity group are significantly different 90% of the time if their yields differ by more than the LSD value shown for that maturity group.

DATA USE. Inclusion of entries in the Ohio Soybean Performance Trials does not constitute an endorsement of a particular entry by the Ohio State University, Ohio Agricultural Research and Development Center, or the Ohio State University Extension.

Soil pH 7.64 7.68 7.39 7.62 7.75 7.55

Normal Variety Weed Control

Preemerge (all sites) Valor XLT / Dual II / Roundup UltraMax

Postemerge (all sites) Roundup UltraMax / SelectMax

11/11 All educational programs and activities conducted by Ohio State University Extension are available to clientele on a nondiscriminatory basis without regard to race, color, creed, religion, sexual orientation, national origin, gender, age, disability or Vietnam-era veteran status. Issued in furtherance of Cooperative Extension work, Acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture, Keith L. Smith, Director, Ohio State University Extension.