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

Abstract

Maize (Zea mays L.) is a primary energy-supplying grain for animal feed in the United States. However, it is defi cient 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. Signifi cant 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 selfi ng. 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, identifi ed as BSSS53 and later released by the Iowa State Experiment Station as B101 after obtaining the high methionine information from the University of Minnesota.

Agronomic and Kernel Compositional Traits of Blue Maize Landraces from the Southwestern United States

“…Lysine levels of floury Peruvian maize landraces were also shown to have lysine levels that did not differ from ordinary corns (Alexander and Elmore, 1968). Methionine levels of the OPVs tested in our study were similar to the values reported by Phillips et al (2008) for high-methionine Corn Belt Dent maize inbreds (2.25 to 3.45 g kg -1…”

Development of maize inbred lines with elevated grain methionine concentration from a high methionine population

“…A natural mutation called dzr1 was identified in an inbred line called BSSS53 (Phillips et al, 1981) that was later released as B101 (Hallauer & Wright, 1995). This line was used as a donor line in a backcrossing program to develop several high methionine inbred lines (Olsen et al, 2003;Phillips et al, 2008). The dzr1 gene has been shown to regulate levels of the high methionine 10 kDa delta zein transcript (Cruz-Alvarez et al, 1991).…”

Wide variability in kernel composition, seed characteristics, and zein profiles among diverse maize inbreds, landraces, and teosinte

“…One example of this is the development of Quality Protein Maize, where the opaque2 mutation alters zein levels in the kernels (Prasanna et al 2001). A second example is the use of dzr1, a mutation that results in overproduction of a methionine-rich zein, to develop high-methionine inbred lines (Phillips et al 2008).…”