TITLE:
Planting Date, Seeding Rate, and Cultivar Impact Agronomic Traits and Semolina of Durum Wheat
AUTHORS:
Shana M. Forster, Joel K. Ransom, Frank A. Manthey, John R. Rickertsen, Grant H. Mehring
KEYWORDS:
Durum Wheat, Durum Quality, Planting Date, Seeding Rate, Semolina, Grain Protein
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.8 No.9,
August
4,
2017
ABSTRACT: Durum wheat (Triticum durum Desf.) is a market class of wheat subject to price
discounts in the marketplace if quality standards are not met. This study was
conducted in order to determine how certain agronomic practices might impact
durum wheat quality. The effects of planting date (PD), cultivar, and seeding
rate on agronomic and semolina quality traits were investigated in field trials
conducted near Hettinger and Minot, ND in 2014 and 2015. The interaction of PD
and cultivar was significant for many of the traits evaluated. There was a
significant PD X cultivar interaction or PD and cultivar effect for yield in
all environments. Planting date X cultivar interacted for test weight at all
environments. In general, a delay in PD resulted in a significant decrease in
yield and test weight for all cultivars. However, Carpio yielded more than
other cultivars in high yielding environments while the yield and test weight
of Joppa was more adversely affected by delays in PD. Seeding rate did not have
a consistent effect on any agronomic or quality trait. Protein content, kernel
yellow pigment content, falling number (FN), and vitreous kernels were more
dependent on cultivar, regardless of PD and environment. Semolina extraction,
gluten index (GI), and wet gluten (WG) values tended to decrease with a delay
in PD. These data continue to support cultivar selection as a critical
component for obtaining high-yielding, high-quality durum wheat. However, PD
and environment can impact certain agronomic and end-use traits, regardless of cultivar
grown.