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United States Department of Agriculture

Agricultural Research Service

Research Project: Enhancement of Hard Spring Wheat, Durum, and Oat Quality

Location: Cereal Crops Research

Title: Variability and Relationships Among Mixolab, Mixograph, and Baking Parameters Based on Multi-Environment Spring Wheat Trials

Authors
item Caffee-Treml, Melanie -
item Glover, Karl -
item Krishnan, Padmanaban -
item Hareland, Gary

Submitted to: Cereal Chemistry
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: September 14, 2010
Publication Date: November 1, 2010
Citation: Caffee-Treml, M., Glover, K.D., Krishnan, P., Hareland, G.A. 2010. Variability and Relationships Among Mixolab, Mixograph, and Baking Parameters Based on Multi-Environment Spring Wheat Trials. Cereal Chemistry. 87:574-580.

Interpretive Summary: Large numbers of genotypes require examination in wheat breeding programs in the development of spring wheat cultivars by using predictive methods to test end-use quality. The Mixograph and more recently the Mixolab are instruments used to predict end-use quality of breeding lines. Research was conducted to document variability of, and relationships among, 20 quality parameters obtained from the Mixolab and Mixograph in addition to bake tests. Tests were performed on flour from 18 genotypes grown in 20 environments. Both genotype and environment had significant effects on quality parameter values. Several Mixograph and Mixolab parameters were significantly correlated when genotype means over environments were considered. Correlations between loaf volume and Mixolab parameters within environments were inconsistent, which suggests that average genotype values over environments are most useful. For example, the correlation between Mixolab stability and loaf volume was higher when genotype averages were considered. Results show that genotype selection for Mixolab stability and water absorption should help delineate and improve the selection of cultivars with greater loaf volume.

Technical Abstract: Because of the large number of genotypes that require examination in the development of spring wheat (Triticum aestivum l.) cultivars, breeding programs use predictive methods to test end-use quality. The Mixograph is a widely used predictive test with which end-use quality of many genotypes can be assessed in a short period of time. By comparison, the Mixolab is a relatively new device that may be useful in predicting end-use quality of wheat genotypes within breeding programs. Our objective was to document variability of, and relationships among, 20 parameters obtained from Mixolab, Mixograph, and bake tests. Tests were performed on flour from 18 genotypes grown in 20 environments. Both genotype and environment had significant effects on quality parameter values. Several Mixograph and Mixolab parameters were highly significantly correlated, particularly when genotype means over environments were considered. Correlations between loaf volume and Mixolab parameters within environments were inconsistent and suggest that average genotype values over environments will be most useful. For example, the correlation between Mixolab stability and loaf volume (r = 0.25, p < 0.001) was much higher when genotype averages (r = 0.70, p < 0.001) were considered. Our results show that selection for Mixolab stability and water absorption should help delineate and improve the selection of cultivars with greater loaf volume.

Last Modified: 11/24/2014