DEVELOPMENT OF MAIZE INBREDS, HYBRIDS & ENHANCED GEM BREEDING POPULATIONS FOR SUPERIOR SILAGE, BIOFEEDSTOCK YIELD & COMPOSITIONAL ATTRIBUTES
North Central Regional Plant Introduction Station, Ames, Iowa
2011 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. Documentation is being prepared for the first inbred release derived from the GEM Quality Synthetic cycle 0 (GQS C0). This inbred will be released through the Wisconsin Alumni Research Foundation (WARF). In addition, Wisconsin Quality Synthetic (GQS) development continued by recombining selected families identified in 2010 with good potential for milk production based on the prediction equation of MILK2006. The corn nursery was planted on May 19, 2011 at the West Madison Research Station. In 2011, six new GEM populations entered the development program for silage evaluation and further selection. These included GEMS-0218, 0219, 0220, 0223 and GEMN-0221. Crosses will be made for DK888-derived GEM lines to testers LH244 and LH332, and for AR16026 derived lines to testers LH287 and W604S. The yield trial locations were planted at Arlington on May 24, and at West Madison on May 27, 2011. Advanced lines derived from GEMS-0184 and GEMS-0183 was included in yield trials in 2011. In addition, 19 lines from GEMS-0188 and GEMS-0189, and 22 lines from 06GEM05390 (AR16021:S0908a) were included in 2011 trials. 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 Authorized Departmental Officer's Designated Representative (ADODR) or Cooperator on status of experiments during the growing season.