Fri, Jan 27, 2017
by Andy Michel, Field Crops Entomologist, Ohio State University
In the course of generating DNA sequences with projects funded by The Ohio Soybean Council and The North Central Soybean Research Program, we were able to sequence the entire soybean aphid genome
This genome represents the 4th aphid species with a completely described genome (in addition to the pea aphid, Russian wheat aphid, and green peach aphid). It will further advance our ability to identify soybean aphid genes responsible for overcoming resistant soybean, and hopefully lead to a wider use of aphid-resistant soybean.
Tue, Dec 20, 2016
by Kiersten Wise, Soybean Plant Pathologist, Purdue University
New seed and foliar fungicide programs and fungicide products have been marketed to protect soybeans against soil-borne diseases and plant stress. In a recently-completed project, funded by the North Central Soybean Research Program, soybean plant pathologists in six mid-western states conducted a regional evaluation of these products to determine their impact on charcoal rot development and yield.
Tue, Nov 15, 2016
by Damon Smith, Soybean Plant Pathologist, University of Wisconsin
In recent years stem canker and other diseases caused by the Diaporthe
group of fungi have become increasingly problematic in the North Central region, with 2014 being an especially prevalent year. Stem canker epidemics can occur in wet springs, and with climate experts predicting a trend of wetter springs, this disease is considered an re-emerging problem in the region.
Tue, Nov 1, 2016
by George Graef, Soybean Breeder, University of Nebraska
The USDA Soybean Germplasm Collection contains over 21,000 accessions (plant or seed samples) including wild relatives, landraces, and soybean cultivars from around the world. Domestication of soybean has resulted in a loss of genetic diversity, with landraces retaining only about 63% of the diversity found in the wild Glycine soja
Because the genetic diversity in current soybean cultivars is limited, we need to more effectively use the vast diversity that does exist. We employed statistical methods to sample the collection in three different ways, using the SoySNP50K genotype information to assess the genotypic diversity among accessions. We now have yield and agronomic data exceeding the quality of any yield plot data currently available on this number of accessions.
Tue, Oct 25, 2016
by Stella K. Kantartzi, Southern Illinois University-Carbondale
In soybean, the symbiotic nitrogen (N)-fixing bacteria provide the needed N to the plant; however, modern cultivars rely on N fertilizers to achieve their full yield potential. Therefore, the improvement of di-nitrogen fixation capacity is considered essential in soybean breeding and might be achieved through the evaluation of traits related to biological nitrogen fixation.
Mon, Oct 10, 2016
by Harold N. Trick, Director of KSU Plant Transformation Lab, Kansas State University
In the past year, we have selected four transgenic soybean lines that have shown consistent improved resistance to soybean cyst nematode (SCN). Two lines that target a specific nematode gene were able to reduce the number of SCN cysts by 50-60% and the number of SCN eggs by 55-70%, compared to the control. Two lines targeting a second gene were able to reduce both cyst and egg densities by 50 to 70% compared to the control.