Until recently, the viscoamylograph had been the primary method for
measuring starch as it relates to noodle quality in wheat. This method
requires a large sample of flour and is time consuming. With the introduction
of the rapid visco-analyser (RVA) in 1986 and the more recent flour swelling
volume procedure, both the time to determine starch quality and the sample
size required have been reduced
Parents, reciprocal F���, and backcross generations from a cross
involving two white wheat lines were space-planted to study the association
among the three procedures for measuring noodle starch quality. Grain
protein and hardness and plant height also were measured. Differences
among the generations were observed for the viscoamylograph, flour
swelling volume, and plant height. Coefficients of variation were low for
both flour swelling volume and plant height.
A significant positive association was found between the
viscoamylograph and the RVA (r=0.61). This indicates that for the populations evaluated in this study the RVA can be used in place of the viscoamylograph to measure starch quality. The RVA values, however, varied greatly between years suggesting a large environmental influence. There was also evidence for a genotype by environment interaction. No maternal effects were noted between reciprocal crosses.
Conflicting results were found for the association between the flour swelling volume procedure and the RVA and viscoamylograph. Further experiments are required to clarify the possible association between flour swelling volume and other starch quality tests. Such experiments may have to be delayed until the F��� or F��� generations when adequate amounts of flour can be obtained from more genetically uniform lines. / Graduation date: 1997
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/34221 |
| Date | 12 December 1996 |
| Creators | Weight, Chris (Christopher Thompson) |
| Contributors | Kronstad, Warren E. |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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