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REGISTRATIONS OF CULTIVARS

Registration of ‘Soyola’ Soybean

^a USDA-ARS, Dep. of Crop Science, N.C. State University, 3127 Ligon Street, Raleigh, NC 27607
^b USDA-ARS-NPS-CPPVS, George Washington Carver Center, 5602 Sunnyside Avenue, Beltsville, MD 20705-5139

^* Corresponding author (jburton{at}cropserv1.cropsci.ncsu.edu)

‘Soyola’ soybean [Glycine max (L.) Merr.] (Reg. no. CV-462, PI 614702) was developed by USDA-ARS, in cooperation with the North Carolina Agricultural Research Service. It was released in 1999 to provide a high-yielding cultivar of Group VI maturity with a decreased concentration of linolenic acid in the seed lipids. Soyola is most adapted to production between 33 and 37° N latitude.

Soyola is the bulk of an F₅–derived line from the first backcross of a selection from the cross N87-2117-3 x ‘Brim’ to the cultivar Brim (Burton et al., 1994). The female parent, N78-2117-3 was a selection from the cross N78-2245 x PI 123440. The line, N78-2245, has elevated levels of oleic acid in the seed oil and was derived from the fifth cycle population of a recurrent selection experiment (Burton et al., 1983). The parents of that population (RSFA) were PI 90406, PI 92567, and N69-2774, the ms₁ male-sterile germplasm line (Brim and Young, 1971). PI 123440 is a plant introduction with low linolenic acid relative to standard soybean cultivars.

Soyola was tested in the Uniform Preliminary VI nursery in 1995 (Kenty and Mosley, 1995) and in the Uniform VI nursery in 1996 and 1997 (Tyler and Bell, 1996, 1997). It was tested in the North Carolina Official Variety Trials in 1997 and 1998 (Bowman, 1997, 1998). In the Uniform tests (40 locations), Soyola matured on the same day as the check cultivar Brim in full-season planting. Averaged across all regional tests (1995–1997, 48 locations), the yield of Soyola was 3088 kg ha^–1. Average yields of the check cultivars Brim and Dillon were 3085 kg ha^–1 and 3042 kg ha^–1, respectively. In North Carolina Official variety trials (a total of 11 locations in 1997 and 1998), yields of Soyola were 4.7% higher than average yields of Dillon and Brim in the same tests.

In the 1995 Uniform VI nursery (five locations in NC, TX, AL, GA, and AR), linolenic acid concentration in the seed lipids of Soyola was 4.0 g 100^–1 g. In 1998 at one location in North Carolina, linolenic acid concentration of Soyola was 4.2 g 100^–1 g compared with 7.3 g 100^–1 g for the cultivar Dillon.

In the Uniform VI nurseries, plant height, seed quality, and lodging scores were similar for both Soyola and Brim. Soyola has yellow seed, with shiny luster, buff hila, white flowers, gray pubescence, brown pod walls, and determinate growth habit. Soyola has good resistance to lodging and Soybean mosaic virus. It is susceptible to stem canker [caused by Diaporthe phaseolorum (Cook and Ellis) Socc. var. meridionalis F.A. Fernandez], root-knot nematodes [Meloidogyne arenaria (Neal Chitwood and M. incognita (Kofoid and White) Chitwood], and soybean cyst nematodes (Heterodera glycines Schinohe).

In 1999, Breeder seed was provided to North Carolina Foundation Seed, Inc. Seed was distributed to other states by request and according to seed supply. The North Carolina Agricultural Research Service will be responsible for maintaining Breeder seed. Small samples (500 seeds) of Soyola can be obtained from the corresponding author for at least five years.

NOTES

Registration by CSSA.

Accepted for publication August 31, 2003.

REFERENCES

• Bowman, D.T. 1997. Measured crop performance soybean and cotton. Dep. of Crop Science, North Carolina State Univ., Raleigh, NC.
• Bowman, D.T. 1998. Measured crop performance soybean and cotton. Dep. of Crop Science, North Carolina State Univ., Raleigh, NC.
• Brim, C.A., and M.F. Young. 1971. Inheritance of a male-sterile character in soybeans. Crop Sci. 11:564–566.
• Burton, J.W., T.E. Carter, Jr., and E.B. Huie. 1994. Registration of ‘Brim’ soybean. Crop Sci. 34:301.[Free Full Text]
• Burton, J.W., R.F. Wilson, and C.A. Brim. 1983. Recurrent selection in soybeans IV. Selection for increased oleic acid percentage in seed oil. Crop Sci. 23:744–747.[Abstract/Free Full Text]
• Kenty, M.M., and S.D. Mosley. (ed.) The uniform soybean tests, southern states: 1995. USDA-ARS, Stoneville, MS.
• Tyler, J.M., and P. Bell. (ed.) The uniform soybean tests, southern states: 1996. USDA-ARS, Stoneville, MS.
• Tyler, J.M., and P. Bell. (ed.) The uniform soybean tests, southern states: 1997. USDA-ARS, Stoneville, MS.

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