Abstract: Using PCR-amplification method, the coding sequences of a novel low-molecular-weight glutenin (LMW-GS) gene, LMWCM42-1, was isolated from the genomic DNA of wheat (Triticum aestivum L.) variety Chuanmai 42. The full coding region of this gene consisted of 846 nucleotides, and encoded a protein with 281 amino acids. LMWCM42-1 is a typical low-molecular-weight glutenin subunit (LMW-GS) gene. In spite of high similarity with the known LMW-GSs, LMWCM42-1 was quite different from the known LMW-GS in the N-terminal, central repetitive domain and C-terminal domain. It was found that LMWCM42-1 was located within the Glu-D3 locus by phylogenetic analysis.