Abstract:

【Objective】 SGP-A1 null in some landraces, black wheats from China and abroad were identified, and the effects of SGP-A1 null on the contents of amylose and amylopectin and flour pasting properties were studied in order to supply with new germplasms for wheat breeding and a theoretical basis for the improvement of wheat quality. 【Method】 The identification of null lines of SGP-A1 was done by SDS-PAGE analysis, and the content of amylose and amylopectin for all tested matierials was tested by dual-wavelength spectrophotometer and flour pasting properties by rapid viscosity analyzer (RVA). 【Result】 Twenty-six materials lacking SGP-A1 were identified. The lack of SGP-A1 results in decrease of amylopectin and setback in RVA parameters, but increase of amylose and the ratio of amylose and amylopectin. However, there were no significant effects on grain weight, starch content and other flour pasting parameters. 【Conclusion】 SGP-A1 null in wheat increases amylose content and decreases setback of flour pasting properties.

Key words: Triticum aestivum L.')">Triticum aestivum L., SGP-A1, amylose content, amylopectin content, RVA parameters