DEVELOPMENT OF MAIZE INBREDS, HYBRIDS & ENHANCED GEM BREEDING POPULATIONS FOR SUPERIOR SILAGE, BIOFEEDSTOCK YIELD & COMPOSITIONAL ATTRIBUTES
North Central Regional Plant Introduction Station, Ames, Iowa
2010 Annual Report
1a.Objectives (from AD-416)
Evaluate and develop germplasm and scientific information that support the use of maize for silage and as a feedstock for biofuel.
1b.Approach (from AD-416)
Three approaches will be used and consist of development of the GEM Quality Synthetic (GQS) population through recurrent selection, development of superior inbreds for silage yield and nutritional attributes through pedigree breeding methods, and identification and release of germplasm with lignocellulosic ethanol potential for use as a biofeedstock. Analytical methods used include conventional silage yield trials and near infrared spectroscopy (NIRS) for silage attributes, and for ethanol measurement.
This project relates to the primary objectives of the parent project which includes the development and evaluation of value-added traits such as silage nutritional quality and yield. Five inbred lines derived from the GEM populations SCRO1:N1310-398 (W606S), BR52051:N04-76 (W607S), CH05015:N15-8 (W608S), FS8B(T):N11a-322 (W609S), and CUBA164:S2012-235 (W610S) were recently released from the Wisconsin Alumni Research Foundation (WARF). In addition, work continued on the GEM Quality Synthetic (GQS) which was derived from selected families of CUBA164:S1517 and CUBA117:S1520. In 2010, approximately 200 top crosses from GQS cycle 1 were planted for silage trials at Madison and Arlington, WI on May 6 and May 20 respectively. Advanced yield testing is being conducted from lines derived from GEM breeding crosses with AR16026, DK212T, DK888, and GUAT209. Other testcrosses made in 2009 will be evaluated in first year trials in 2010. These include selections from the GEM releases GEMS-0175, GEMS-0176, GEMS-0183, and GEMS-0184. Nine new GEM populations were incorporated into the nursery which was planted on May 20 in Madison. The methods for monitoring activities include (1) observing germplasm developed by the Cooperator, and (2) progress reports submitted by the Cooperator in July and December for the Annual GEM Cooperator Meeting. E-mail exchanges were periodically initiated by the ADODR or Cooperator on status of experiments during the growing season, and new germplasm resources were exchanged for silage and lignocellulosic ethanol experimentation.