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Background and Importance of ‘Minnesota 13’ Corn

^a Dep. of Crop Sciences, Univ. of Illinois, Urbana, IL 61801
^b Univ. of Minnesota Archives

View larger version (108K): [in this window] [in a new window]   Figure 1. Willet Hays, primary developer of ‘Minnesota 13’.

View larger version (105K): [in this window] [in a new window]   Figure 2. The 1890 University Number Book and 1894 Corn Nursery Book (University of Minnesota Archives). Leather-bound ledgers of high-rag-content paper with entries in India ink.

View larger version (152K): [in this window] [in a new window]   Figure 3. The 1890 Number Book (p. 80; University of Minnesota Archives). Partial descriptions of the first corn accessions.

View larger version (55K): [in this window] [in a new window]   Figure 4. University Farm Account Book, April 1893 (University of Minnesota Archives). DeCou & Co. corn purchases.

View larger version (175K): [in this window] [in a new window]   Figure 5. 1894 Minnesota Corn Nursery Book (p. 72), showing the written in portions for No. 13. (University of Minnesota Archives.)

View larger version (19K): [in this window] [in a new window]   Figure 6. Iodent germplasm development. Example of cumulative selection (recurrent selection with late testing) practiced over a half century. Courtesy of Raymond Baker, adapted from Hallauer and Miranda (1981) and Troyer (1990, 1999).

View larger version (28K): [in this window] [in a new window]   Figure 7. Larger pie graph shows the documented background of U.S. hybrid corn. ‘Minnesota 13’ totals about 13%. Smaller pie graph shows major inbreds contributing to Minnesota 13 backgrounds (Smith et al., 1990; Troyer, 1999, 2004a).