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GERMPLASM

Registration of NDBS11(FR-M)C3, NDBS1011, and NDBSK(HI-M)C3 Maize Germplasm

Corn Breeding and Genetics, Dep. of Plant Sciences, North Dakota State Univ., Fargo, ND 58105-5051

^* Corresponding author (marcelo.carena{at}ndsu.edu).

ABSTRACT

NDBS11(FR-M)C3 (Reg. No. GP-554, PI 650887), NDBS1011 (Reg. No. GP-555, PI 650888), and NDBSK(HI-M)C3 (Reg. No. GP-556, PI 650889), are three new maize (Zea mays L.) populations that serve as new sources for inbred line development targeted at 85-95RM hybrids. They were developed by the North Dakota State University maize breeding program and released by the North Dakota Agricultural Experiment Station (NDAES) in February 2007. NDBS11(FR-M)C3 derived from BS11(FR)C13 and three cycles of stratified mass selection for earliness in North Dakota. NDBS1011 was developed from BS10(FR)C13 x BS11(FR)C13 and four cycles of stratified mass selection for earliness in North Dakota. NDBSK(HI-M)C3 derived from BSK(HI)C11 and three cycles of stratified mass selection for earliness in North Dakota. Cycle populations were evaluated across nine North Dakota environments in 2005, 2006, and 2007. Stratified mass selection was confirmed to be an effective and inexpensive method for adapting populations (e.g., 2 d year^–1) and also was demonstrated to produce significant positive correlated responses in economically important traits (e.g., 0.4 Mg ha^–1 yr^–1). Preliminary diallel studies suggested that NDBSK(HI-M)C3 shares the same heterotic group as BS22(R-T)C8 and NDSAB(MER-FS)C14 (e.g., early SSS), while NDBS11(FR-M)C3 shares the same group with BS21(R-T)C8, LEAMING(F-S)C6, and CGL(S1-S2)C5 (e.g., early non SSS). NDBS1011 seems to belong to an alternative heterotic group.

Abbreviations: GCA, general combining ability • NDAES, North Dakota Agricultural Experiment Station • NDSU, North Dakota State University • SCA, specific combining ability