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Chen, Can; Chang, Jingming; Wang, Sheng; Lu, Jie; Liu, Yi; Si, Hongqi; Sun, Genlou; Ma, Chuanxi
Protoplasma, 07/2021, Volume: 258, Issue: 4Journal Article
In common wheat, stem strength is one of the key factors for lodging resistance, which is influenced by lignin content. Cinnamyl alcohol dehydrogenase (CAD) is a vital enzyme in the pathway of lignin biosynthesis. Cloning and marker development of the CAD gene could be helpful for lodging resistance breeding. In this study, the full-length genomic DNA sequence of CAD gene in wheat was cloned by using homologous strategy. A marker 5-f2r2 was developed based on CAD sequence and used to genotype 258 wheat lines. Four haplotype combinations of CAD genes were identified in 258 wheat lines. Correction analyses among the CAD gene expression, CAD activity, and stem strength indicated significant positive correlation between CAD gene expression and CAD activity, between wheat CAD activity and wheat stem strength. The haplotype combination B is significantly associated with the lower enzyme activity and weak stem strength, which was supported by the level of CAD gene expression. The CAD activity and stem strength of wheat could be distinguished to some extent using this pair of specific primer 5-f2r2 designed in this study, indicating that the sequence targeted site (STS) marker 5-f2r2 could be used in marker assistant selection (MAS) breeding.
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