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GERMPLASM

Registration of High-Methionine Versions of Maize Inbreds A632, B73, and Mo17

^a Dep. of Agronomy and Plant Genetics, and Microbial and Plant Genomics Institute, 1991 Upper Buford Cir., Univ. of Minnesota, St. Paul, MN 55108
^b Monsanto Corn Research, 2440 Hwy. 19 Blvd., Stanton, MN 55018
^c Pioneer Hi-Bred International, Inc., 7300 NW 62nd Ave., P.O. 1004, Johnston, IA 50131

^* Corresponding author (phill005{at}umn.edu).

ABSTRACT

Maize (Zea mays L.) is a primary energy-supplying grain for animal feed in the United States. However, it is deficient in the essential amino acid methionine. Of the maize used for animal feed, 20% is fed to poultry, where the methionine requirement is particularly important. Significant increases in maize methionine levels in the lines reported here can be effectively used in poultry nutrition as well as in human diets where corn and bean (Phaseolus L.) play a major role. Eleven inbred lines of high-methionine maize (58611 Inbred A632 [Reg. No. GP-557, PI 648423], 58609 A632 (Meth) BC5S4 [Reg. No. GP-558, PI 648424], 58610 A632 (Meth) BC5S4 [Reg. No. GP-559, PI 648425], 58612 Inbred B73 [Reg. No. GP-560, PI 648426], 58613 B73 (Meth) BC5S4 [Reg. No. GP-561, PI 648427], 58614 B73 (Meth) BC5S4 [Reg. No. GP-562, PI 648428], 58615 B73 (Meth) BC5S4 [Reg. No. GP-563, PI 648429], 58801 Inbred Mo17 [Reg. No. GP-564, PI 648430], 58802 Mo17 (Meth) BCS3 [Reg. No. GP-565, PI 648431], 58803 Mo17 (Meth) BCS3 [Reg. No. GP-566, PI 648432], and 58804 Mo17 (Meth) BCS3 [Reg. No. GP-567, PI 648433]) were developed by the University of Minnesota and released on 26 Oct. 2007 by the Minnesota Agricultural Experimental Station. These materials were produced by crossing BSSS53 with inbred lines A632, B73, and Mo17 and backcrossing to the respective inbred with intermittent selfing. Maize inbred lines A632, B73, and Mo17 are released with methionine elevated as much as 12.5, 25.0, and 50.0%, respectively, above the recurrent parent. The germplasm source of the high methionine trait is a random line isolate from the Iowa Stiff Stalk Synthetic, identified as BSSS53 and later released by the Iowa State Experiment Station as B101 after obtaining the high methionine information from the University of Minnesota.

Abbreviations: BC, backcross • HPLC, high-performance liquid chromatography • NIRS, near infrared reflectance spectroscopy • QTL, quantitative trait locus • S, self