| dc.contributor.author | Dong, Naiyuan | |
| dc.description.abstract | There is a need to increase the value of crops and develop the next generation of healthier
products. Quality protein maize (Zea mays L.) is an option but has never been adapted to short –
season environments. Quality protein maize (QPM) with homozygous embryo and endosperm
for mutant allele o2 at the α-zeins regulatory gene opaque-2 shows about 60 to 100% increase in
lysine and tryptophan essential amino acids when comparing with non-QPM maize. The
objectives of this research were to adapt QPM genotypes to the northern U.S. through the NDSU
Early QPM Program, and to evaluate the agronomic potential of early generation QPM lines and
hybrids developed by the NDSU maize breeding program for the northern USA. Fifty-four
inbred lines, including 47 QPM donor lines from the Iowa State University (ISU) maize breeding
program, six experimental lines from the NDSU maize breeding program and one ex-PVP line
from industry, were selected to produce 94 early-QPM backcross populations. Based on the
earliness, protein content, and amino acid levels of lysine, 218 BC1S2 lines were selected for
testcrosses with industry testers. Experiments evaluating testcrosses were arranged in 12 x 12
and 10 x 10 partially balanced lattice designs across three environments in 2013 and 2014. Based
on this evaluation, totally 48 S2 lines were selected for further development, 17 of them
representing the Stiff Stalk (SS) heterotic group and 31 representing the non-SS-group. Selected
lines provided unique advanced inbred lines with hybrid combinations showing not only above
average grain yield, dry down, and protein content but also, high levels of lysine, tryptophan, and
methionine. The results of this research show, for the first time, the successful adaptation of
QPM genotypes to short-season environments. The NDSU maize-breeding program has
developed the first high quality maize products through the EarlyQPM and EarlyQPMF (for
feedstock) national programs. | en_US |
| dc.publisher | North Dakota State University | en_US |
| dc.rights | NDSU policy 190.6.2 | |
| dc.title | Adaptation of Quality Protein Maize (Zea Mays L.) to Northern U.S. Corn Belt | en_US |
| dc.type | Dissertation | en_US |
| dc.type | Video | en_US |
| dc.date.accessioned | 2015-06-19T18:40:11Z | |
| dc.date.available | 2015-06-19T18:40:11Z | |
| dc.date.issued | 2015 | |
| dc.identifier.uri | http://hdl.handle.net/10365/25180 | |
| dc.subject.lcsh | Botany. | en_US |
| dc.description.sponsorship | North Dakota Corn Growers Association | en_US |
| dc.description.sponsorship | Minnesota Corn Growers Association | en_US |
| dc.rights.uri | https://www.ndsu.edu/fileadmin/policy/190.pdf | |
| ndsu.degree | Doctor of Philosophy (PhD) | en_US |
| ndsu.college | Agriculture, Food Systems and Natural Resources | en_US |
| ndsu.department | Plant Sciences | en_US |
| ndsu.program | Plant Sciences | en_US |
| ndsu.advisor | Carena, Marcelo J. | |
