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Background  The aerial parts of most land plants are covered with cuticular wax which is important for plants to avoid harmful factors. There is still no cloning study about wax synthesis gene of the alcohol-forming pathway in  Brassica  species.    Results  Scanning electron microscopy (SEM) showed that, compared with wild type (WT), wax crystal are severely reduced in both the adaxial and abaxial sides of cabbage ( Brassica oleracea  L. var.  capitata  L.) leaves from the LD10GL mutant. Genetic analysis results revealed that the glossy trait of LD10GL is controlled by a single recessive gene, and fine mapping results revealed that the target gene  Cgl2  ( Cabbage glossy 2 ) is located within a physical region of 170 kb on chromosome 1. Based on sequence analysis of the genes in the mapped region, the gene designated  Bol013612  was speculated to be the candidate gene. Gene  Bol013612  is homologous to  Arabidopsis CER4 , which encodes fatty acyl-coenzyme A reductase. Sequencing identified a single nucleotide substitution at an intron/exon boundary that results in an insertion of six nucleotides in the cDNA of  Bol013612  in LD10GL. The phenotypic defect of LD10GL was confirmed by a functional complementation test with  Arabidopsis  mutant  cer4 .    Conclusions  Our results indicated that wax crystals of cabbage mutant LD10GL are severely reduced and mutation of gene  Bol013612  causes a glossy phenotype in the LD10GL mutant.    Electronic supplementary material  The online version of this article doi: (10.1186/s12870-017-1162-8) contains supplementary material, which is available to authorized users.

Cgl2 plays an essential role in cuticular wax biosynthesis in cabbage (Brassica oleracea L. var. capitata)