|Shannon, J - UNIVERSITY OF MISSOURI|
|Wrather, J - UNIVERSITY OF MISSOURI|
Submitted to: Crop Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: May 1, 2005
Publication Date: July 15, 2005
Repository URL: http://hdl.handle.net/10113/31781
Citation: Shannon, J.G., Nelson, R.L., Wrather, J.A. 2005. Registration of S99-11509 and S99-11986 soybean germplasm. Crop Science. 45(4):1672-1673. Interpretive Summary: This is a germplasm release and no interpretive summary is required.
Technical Abstract: Soybean germplasm lines S99-11509 and S97-11986 were developed and released for use as parental lines in soybean improvement programs by the University of Missouri-Delta Center, Portageville, MO, the USDA- Agricultural Research Service, and the Illinois Agricultural Experiment Station. S99-11509 and S99-11986 combine high yield on less productive soils of the southern US with unique diversity that is not known to be present in the current gene pool for cultivar development in North America. These lines were developed through an early generation testing procedure. The progenitor populations were yield tested as F2 families in the F3 and F4 generations at Urbana, Illinois. S99-11509 and S99-11986 were derived from single-plant selections made in the F5 generation and bulk harvested in the F6 at Urbana Illinois. S99-11509 is from LG91-7320 x Probst. LG91-7320 is from BSR 101 x LG82-8379. LG82-8379 is from PI 68508 x FC 04007B. PI 68508, maturity group II, was collected in northeast China in 1926. FC 04007B, maturity group III, was imported in 1924 from an unknown origin. S99-11986 is derived entirely from plant introductions from a cross of LG87-1782 x LG88-3186. LG87-1782 is from PI 297515 x PI 290126B and LG88-3186 is from PI 427099 x PI 445830. PIs 290126B and 297515 are maturity group II introduced from Hungary in 1963 and 1964, respectively. PI 427099 and PI 445830 are maturity group I introduced from China in 1978 and 1980, respectively. These lines were tested in southeast Missouri research trials in four environments in 2001 and five environments each in 2002 and 2003 versus DP4748S, a high yielding late group IV from Delta and Pine Land Co, Scott, MS. S99-11509 and S99-11986 were equal in yield to DP4748S in three tests on very sandy soils and were 2% and 4% less, respectively in six tests on sharkey clay (Vertic Haplaquept, very fine montmorillonitic, thermic) than DP4748S. However, in five tests on productive loam soils, yields of S99-11509 and S99-11986 were 10 and 15% less, respectively than DP4748S. Good performance on clay and sand show that these lines have potential as parental material to breed for higher yielding lines on more stress prone soil types. S99-11986 and S99-11509 were tested in the Preliminary IV-S of the Uniform Soybean Tests, Southern Region in 2002 and 2003, respectively. S99-11986 yielded 10% less, was 15 cm taller, 6 d later and lodged more (1.6 versus 1.2) than KS4602N. S99-11509 yielded 5% more, was 10 cm taller, 1 d later and had the same lodging score compared to KS4602N. Both S99-11509 and S99-11986 are resistant to stem canker [caused by Diaporthe phaseolorum (Cooke and Ellis) Sacc. var. meridionalis F.A. Fernandez] and bacterial pustule [caused by Xanthomonas axonpodis pv. glycines (Naleno) Vauterin et al.]. They are susceptible to soybean cyst nematode Heterodera glycines Ichinohe and root knot nematodes (Meloidogyne spp.). Seeds of S99-11509 and S99-11986 will be deposited in the USDA Soybean Germplasm Collection.