Finding the missing honey bee genes: lessons learned from a genome upgrade

Area of Science:

• Genomics
• Bioinformatics
• Zoology

Background:

• Previous honey bee genome assemblies faced challenges due to GC content, impacting gene set accuracy.
• Early annotations suggested fewer genes than expected for an insect genome.
• Limited finished quality of Metazoan genomes indicates ongoing potential for assembly improvements.

Purpose of the Study:

• To present an upgraded honey bee genome assembly and annotation.
• To re-evaluate the honey bee gene count based on improved genomic data.
• To enhance the genomic resources available for the honey bee (Apis mellifera).

Main Methods:

• Development of a new genome assembly (Amel_4.5).
• Creation of a new gene annotation set (OGSv3.2).
• Analysis of RNA sequencing and protein data to identify new genes.

Main Results:

• The improved assembly (Amel_4.5) is more contiguous and complete.
• The new gene set (OGSv3.2) includes approximately 5000 more protein-coding genes, a 50% increase.
• The updated honey bee genome contains a gene number comparable to other insect genomes.

Conclusions:

• Genome upgrade lessons inform future sequencing projects.
• Enhanced genomic resources significantly benefit honey bee research.
• Improved data supports the honey bee's role as a model for social behavior and ecological importance.