Genomic insights into genus Buxus and boxwood blight

Abstract

The genus Buxus, encompassing approximately 70 species, is highly valued for its ornamental appeal and is widely used in landscaping. These evergreen shrubs are predominantly found in Europe, Asia, Africa, the Caribbean, and parts of India and the Himalayas, but are absent in temperate North America and Australia. Nowadays, the genus faces significant threats from boxwood blight, a disease caused by Calonectria pseudonaviculata and Calonectria henricotiae, which leads to rapid leaf blight and defoliation, potentially reducing genetic diversity within Buxus species. Recent genomic studies have advanced our understanding of Buxus species and the pathogens affecting them. This review article summarizes the key findings from recent decades genomic studies on genus Buxus and boxwood blight, emphasizing the importance of genetic research in managing and preserving these valuable ornamental plants.