The Development Strategy Research of WX Appliance Cheng Du Branch Company;

Effects of wheat endosperm Wx protein deficiencies on starch content;

【Objective】This study was to elucidate the effect of wheat Wx protein deficiency on starch physiochemical properties and noodle quality.

In order to investigate the pre-harvest sprouting(PHS)percentage,α-amylase activity and soluble sugar content in grains of 11 varieties with complete Wx proteins deficiency(waxy type),11 varieties with one or two Wx proteins deficiency(non-waxy type),2 varieties with complete Wx proteins(non-waxy type)and 1 white grain cultivar as a PHS check in wheat(Triticum aestivum L.

The functional mechanism of waxy protein and Wx gene,the allele mutant of Wx gene,the production ways of waxy mutant lines,the quality and property of waxy wheat and its uses were summarized,which were involved in the internal and external research.

The results showed that the materials with GG-type of Wx gene had higher AC and lower GC,however,the materials with TT-type of Wx gene had moderate AC and higher GC;there were significant negative correlations between AC and GC、GT.

Based on the results of genotype identification,the waxy wheat s improved BC5F2 backcross progenies were used in this study to verify the effects of null alleles on reducing amylose content,determine the amylose synthesis capacity of each Wx gene,and investigate the correlation of amylose content with agonomic traits,quality traits and starch pasting properties,respectively.

This paper reviewed the studies on waxy wheat and Wx genes at home and abroad,including the quality characters,selection and identification of Wx genes and waxy individual,the molecular biology of Wx genes and,waxy wheat breeding ect.

To elucidate the starch quality characteristics of Yangmai varieties,RVA parameters and the effects of Wx-B1 null on RVA parameters were studied in 2003 and 2004 about Yangmai varieties and those from southern China wheat area and northern China wheat area.