Genome-Wide Analysis of the Polygalacturonase Gene Family in Macadamia and Identification of Members Involved in Fruit Abscission.

ABSTRACT: Severe physiological fruit abscission significantly limits yield potential in macadamia. Polygalacturonase (PG), a key hydrolytic enzyme in pectin degradation, plays a critical role in fruit abscission. However, in the macadamia genome, the PG gene family and the members involved in fruit abscission remain poorly understood. In this study, 56 PG gene family members, which were unevenly distributed across 13 of the 14 chromosomes, were identified in the macadamia genome. Phylogenetic analysis clustered these genes into seven clades, with most members found in clades D and E. The MiPGs contained 3-11 exons and 2-10 introns, and except for those in clades E and G, most contained conserved domains I-IV and were predicted to be localized exclusively to the cell membrane.

SUBMITTER: Fei YC 

PROVIDER: S-EPMC12157947 | biostudies-literature | 2025 May

REPOSITORIES: biostudies-literature