Identification of MYB Transcription Factors Involving in Fruit Quality Regulation of Duch.

The cultivated strawberry ( Duch.) is an important horticultural crop. The economic values of strawberry cultivars are decided by their fruit qualities including taste, color and aroma. The important role of MYB transcription factors in fruit quality regulation is recognized increasingly with the identification of genes involved in metabolism. A total of 407 genes of () were identified in the genome-wide scale and named according to subgenome locations. The 407 were clustered into 36 groups based on phylogenetic analysis. According to synteny analysis, whole genome duplication and segmental duplication contributed over 90% of the expansion of the family. A total of 101 loci with 1-6 alleles were identified by the homologous gene groups on homologous chromosomes. The differentially expressed profiles of three cultivars with different fruit quality and fruit ripe processes provided the 8 candidate loci involved in fruit quality regulation. In this experiment, 7, 5, and 4 were screeded as candidate genes involved in the regulation of metabolism/transportation of anthocyanins, sugars or organic acids and 4-hydroxy-2, 5-dimethyl-3(2H)-furanone, respectively. These results pointed out the key for further functional analysis of gene regulation of strawberry fruit quality and would be helpful in the clarification on ofe roles of in the metabolism of fruit crops.