Heritability and expression of selected mixograph parameters in progeny of parents varying for mixing time

Pelser, F. S. and Labuschagne, M.T. and Wentzel, B. and van Biljon, A. (2016) Heritability and expression of selected mixograph parameters in progeny of parents varying for mixing time. Cereal Research Communications, 44 (3). pp. 472-480. ISSN 0133-3720

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Abstract

The mixograph performs certain rheological measurements during dough mixing and is a good predictor of wheat end-use quality. The aim of this study was to determine the expression and the heritability of mixing characteristics measured with Mixsmart® software and some quality characteristics in hard red spring wheat parents and their F1 progeny. Six parents varying in midline peak time and envelope peak time were crossed in a half diallel design. Parents and progeny were planted in three different environments. General combining ability (GCA) was a significant source of variation for the measured characteristics, and parents differed widely in terms of GCA effects. Midline-development time, -peak integral and -peak time showed high narrow sense heritability. Envelope peak-integral and -tail width displayed high narrow sense heritability for some, but not all locations. High GCA:SCA (specific combining ability) ratios indicated the prevalence of additive gene effects for midline-development time, -peak integral and -peak time, indicating that these characteristics are largely genetically determined, and that selection for them should lead to genetic gain.

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