Project Number: 5012-21000-029-021-N
Project Type: Non-Funded Cooperative Agreement
Start Date: Aug 1, 2021
End Date: Jul 31, 2026
To further advance and evaluate soybean germplasm generated from crosses between Glycine tomentella and Glycine max and to make the material available for research and breeding purposes.
Soybean breeding lines originating from an initial cross between the Glycine max cultivar Dwight (2n = 40) and PI 441001 of the perennial species G. tomentella (2n = 78) will be used for a variety of research objectives. These self-fertile and genetically stable lines were developed through multiple backcrosses to the G. max parent to recover progeny with 2n = 40 chromosomes. Some lines have higher yields than Dwight and the lines vary for maturity date, seed protein and oil content and other traits. These lines will be used as sources of genetic diversity and useful traits in soybean breeding programs. The lines will continue to be screened for disease resistance and abiotic stress tolerance. Lines with resistance to phytophthora root rot have already been identified and the gene(s) responsible for the resistance will be identified. Genetic aberrations have been observed in lines that reverted from 2n = 42 chromosomes to 2n = 40 chromosomes. These changes are being documented and the mechanisms behind these changes will be investigated. In addition, the effects of G. tomentella cytoplasm in lines with yields superior to Dwight will be studied. Third-party access to "Material" and "ARS Material" will be accomplished using agreements that are appropriate for the purpose.