Registration of TN13‐4304 soybean germplasm with good yield, high meal protein, and resistance to peanut and southern root knot nematode

Abstract

AbstractTN13‐4304 (Reg. no. GP‐450, PI 699660) is a conventional late maturity group (MG) IV (relative maturity 4.9) soybean [Glycine max (L.) Merr.] with high seed yield potential, high meal protein, and resistance to southern root knot nematode, peanut root knot nematode, and stem canker. It was developed and released by the University of Tennessee soybean breeding program. TN13‐4304 was developed from reselection within the Asian Vegetable Development Center cultivar ‘AGS 292’, which was originally released for use in the edamame market. In replicated field trials across 26 environments of the USDA Southern Soybean Preliminary MG V Early and Uniform MG V Tests, TN13‐4304 yielded 108 and 101%, respectively, of the average yield of the commercial checks. In the 2018 United Soybean Board Southern Diversity Yield Trials MG IV Late (USBDIV4L), tested across three states, TN13‐4304 yielded 115% of the average of three Asgrow commercial cultivars and had an average seed protein content and oil content of 429 and 219 g kg–1, respectively. In the same test the three Asgrow cultivars had an average seed protein content of 403 g kg–1 and an average oil content of 225 g kg–1, reported using a near infrared spectrometer. In the USBDIV4L, TN13‐4304 was one of only two genotypes that met all targets of yield, seed protein, oil, and meal protein in the test. TN13‐4304 has white flowers, gray pubescence, and a determinate growth habit. The pods have a tan pod wall and the seeds are yellow with smooth seed coats. For decades soybean genetic improvement has focused on increasing yield, which typically increased seed oil content at the expense of protein content in the meal. Although yield remains the top priority, improvements to seed composition have become very important and can have a significant impact on value. There is a limited supply of conventional (non‐genetically modified) germplasm lines available for soybean breeders. Typically, these are released by public land grant universities and by the USDA‐ARS. Release of soybean line TN13‐4304 would provide a conventional line with high protein meal and disease resistance that is useful for breeding programs.