High-quality genome assembly, annotation and evolutionary analysis of
the mungbean (Vigna radiata) genome
Mungbean (Vigna radiata [L.]) is an important economic crop
grown in South, and East Asia. The low contiguity of the current
assembly of V. radiata genome has limited its application. Here,
we report a high-quality chromosome-scale assembled genome of V.
radiata to facilitate the investigation of its genome characteristics
and evolution. By combination of Nanopore long reads, Illumina short
reads and Hi-C data, we generated a high-quality genome assembly of
V. radiata, with 473.67 megabases assembled into 11 chromosomes
with contig N50 and scaffold N50 of 11.3 and 42.4 megabases,
respectively. A total of 52.8% of the genome was annotated as
repetitive sequences, among which LTRs (long terminal repeats) were
predominant (33.9%). The genome of V. radiata was predicted to
contain 33,924 genes, 32,470 (95.7%) of which could be functionally
annotated. Evolutionary analysis revealed an estimated divergence time
of V. radiata from its close relative V. angularis of
~11.66 million years ago. In addition, 277 V.
radiata specific gene families, 18 positively selected genes were
detected and functionally annotated. This high-quality mungbean genome
will provide valuable resources for further genetic analysis and crop
improvement of mungbean and other legume species.