A Telomere-to-telomere genome of the hibernating fat-tailed dwarf lemur (Cheirogaleus medius)

Madagascars dwarf lemurs (genus Cheirogaleus) are the only obligate-hibernating primates and closest relative to humans capable of hibernation. Endemic to the increasingly fragmented dry forests of Madagascar, the fat tailed dwarf lemur (Cheirogaleus medius) represents a unique model for understanding primate physiology and tropical hibernation. Here we present FatTail1, a highly contiguous diploid genome assembly generated from a male C. medius at the Duke Lemur Center using Oxford Nanopore Technologies PromethION sequencing. The assembly spans 2.3 Gb, with an N50 of 103Mb, L50 of 10, and a BUSCO completeness score of over 99%. In addition to a complete mitogenome, we generated allele-specific DNA methylation profiles and annotated 23,925 genes using NCBIs EGAPX. FatTail1 exceeds the gap-free contiguity of previously published strepsirrhine genomes, representing the first telomere-to-telomere genome of a Strepsirrhine primate, and providing a foundation for future studies of primate hibernation, epigenetic regulation, and conservation genomics. ARTICLE SUMMARYDwarf lemurs are the only primates and closest relative to humans capable of months-long hibernation, making them an important model for understanding metabolic adaptations with relevance to human physiology. Here we present FatTail1, the first telomere-to-telomere genome assembly of a strepsirrhine primate, generated from a fat-tailed dwarf lemur (Cheirogaleus medius) using Oxford Nanopore Technologies PromethION sequencing. In addition to a highly complete nuclear genome, we assembled the mitogenome, identified allele-specific DNA methylation profiles and annotated 23,925 genes. FatTail1 exceeds the gap-free contiguity of previously published strepsirrhine genomes and provides an improved genomic resource for studies of hibernation, comparative genomics, epigenetic regulation, evolutionary biology, and conservation of this threatened primate.