To remain competitive in the international marketplace,
soft white wheat cultivars grown in the Pacific Northwest
must have consistent and predictable flour properties
including kernel texture. As a consequence, there is a need
to develop wheat cultivars for specific end uses. Wheat
cultivars with very soft kernels are used largely for making
cookies and cakes. Harder soft white wheats are more
suitable for noodles and flat breads. Numerous studies have
been made to determine the inheritance of kernel texture
between hard and soft wheat; however, very little
information is available concerning the amount of genetic
variability within soft white wheat.
Reciprocal crosses were made between a very soft
(TJB/MON"S") and a soft (Yamhill) white winter wheat
genotype. Data were collected on an individual plant basis
for kernel texture, protein content, and eight selected
agronomic traits. Kernel hardness and protein content were
determined using the near-infrared reflectance spectroscopy
(NIR).
Genetic differences for kernel texture and the other
nine traits were found between the two parents and the
resulting F1 progenies. It would appear that kernel texture
is qualitatively inherited with one or more genes reflecting
additive and nonadditive gene action. However, a large
component of non-genetic variation was also detected.
Of particular interest was the apparent reciprocal
differences found between Fl populations for most of the
traits measured and particularly kernel texture. However,
for kernel texture, such differences were not due to a
dosage effect of the 3n endosperm.
Kernel texture was not found to be associated with
protein content. A negative association of kernel texture
with heading date would suggest a compromise may be
necessary when selecting these traits. Positive associations
were found between kernel hardness with number of tillers,
total biological yield, grain yield, and number of kernels
per spike. / Graduation date: 1992
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/36339 |
| Date | 15 April 1992 |
| Creators | Albahouh, Muhammed S. |
| Contributors | Kronstad, Warren E. |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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