Location: Crop Genetics Research Unit
2011 Annual Report
Twenty-seven new high-germinability breeding lines and 12 soybean cultivars/accessions were evaluated for germination, vigor, hardseededness, Phomopsis seed decay, and seed composition after harvests at maturity, 2 weeks after maturity, and 4 weeks after maturity. Seed yield and seed coat wrinkling were evaluated at harvest maturity. The best high-yielding high-germinability breeding line (DS25-1) yielded 59 bu/A and had a seed germination of 96%. Further, DS25-1 maintained germination above 90% (94%) even after a two-week harvest delay. Its germination percentage only dropped to 82% after a delayed harvest of 4 weeks. By comparison, high-yielding cultivar AG 4903 (67 bu/A) had seed germinations corresponding to the harvest dates of DS25-1 of 44%, 39%, and 33%, respectively. The two lines matured 1 day apart. In terms of Phomopsis seed infection, DS25-1 and AG 4903 had 0 and 8%, respectively, when harvested on time and 2.7 and 11%, respectively, when harvested after a two-week delay. By comparison, DT97-4290 had 27 and 48% Phomopsis seed infection levels when harvested at harvest maturity and with a 14-day harvest delay, respectively. DT97-4290 matured on the same date as AG 4903.
Activities for this project were monitored by the ADODR through visits, reports, and meetings.