DEVELOPMENT OF EARLY MATURING GEM LINES WITH VALUE-ADDED TRAITS
North Central Regional Plant Introduction Station, Ames, Iowa
2010 Annual Report
1a.Objectives (from AD-416)
Develop early maturity (RM<95 days) germplasm with value added-traits (VAT) utilizing exotic sources originating from the GEM Project. VAT's include composition for protein, oil, and starch.
1b.Approach (from AD-416)
Top crosses will be evaluated for performance in early maturity environments of North Dakota. Lines will be selected based on a benchmark for yield and moisture of 101%, and 95-100% respectively. The selected lines will be studied for VAT's. Three stiff-stalk, and six non-stiff stalk populations will be advanced and further selected in the nursery for future development.
This project relates to the primary objectives of the parent project which includes the development and evaluation of very early maturity germplasm (90 days relative maturity) with key value-added traits. These traits include protein, oil, and starch composition, and fermentable ethanol. Early maturity germplasm is deficient in genetic diversity and the long term impact of this project will broaden the germplasm for the northern US Corn Belt region. In October-November 2009, first year yield trials were harvested from GEM lines that were crossed to ND2000, and backcrossed again to the same line. The six GEM populations used were CUBA117:S1520-388, DKB844:S1601-507, BR52051:N04-70, SCO1:N1310-265, FS8B(T):N1802-35, and CH05015:N12-123. The best testcrosses of 2009 were planted in 2010 to obtain a second year of data. One of the more promising GEM populations now in advanced testing is AR16026:S17-66 x ND2000) x ND2000. Several hundred hybrids were produced in the winter nursery from lines derived from this population and planted in 2010 for advanced stage yield testing. The nursery in Fargo, ND was planted in May 2010 and consisted of advanced EarlyGEM lines which are being increased for future distribution. Other germplasm in the nursery includes new S3 generation lines received from Ames, IA which are being crossed to make new F1 populations, or first generation backcross generations (BC1). In addition, the best performing EarlyGEM lines from North Dakota State University are being recombined to create new synthetic populations. The methods for monitoring activities include reviewing progress reports submitted by the Cooperator in July, and in December for the Annual GEM Cooperator Meeting. E-mail correspondence is done on a regular basis during the growing season.