Dc. Doehlert et Ms. Mcmullen, Genotypic and environmental effects on oat milling characteristics and great hardness, CEREAL CHEM, 77(2), 2000, pp. 148-154
The production of oat bran involves the dehulling of oats, inactivation of
their enzymes, and the subsequent grinding and sieving of the clean greats
to isolate the larger bran particles. The bran yield from the oat greats ma
y be related to their hardness, as it is in wheat. Great breakage, which oc
curs during the dehulling process, reduces milling yield and may also be re
lated to great hardness. This study sought to investigate genotypic and env
ironmental effects on oat dry milling and oat dehulling characteristics, an
d attempted to define properties associated with oat great hardness. Signif
icant genotypic differences in bran yield were largely attributed to great
composition, where higher beta-glucan and oil concentrations in the great w
ere associated with higher bran yields. Bran composition was largely depend
ent on a combination of the bran yield and the great composition. Although
great breakage was correlated with bran yield and with great beta-glucan co
ncentration, environmental factors appeared to be more influential, Locatio
ns that had suffered severe crown rust infestations exhibited higher rates
of great breakage during dehulling. Bran yield was not as strongly affected
at the locations infested with crown rust, indicating that bran yield and
great breakage are manifestations of different types of groat hardness and
are only partially related.