A Reference Assembly for the Legume Cover Crop Smooth Vetch Vicia villosa Roth var. glabrescens
Zhongxu Yao, Xinru Li, Yurou Wang, Yaqi Sun, Songchong Lu, Kunlong Su, Huajie Zhang, Shaoyong Yang, Guofeng Yang, Lichao Ma

TL;DR
This paper presents a high-quality genome assembly for smooth vetch, a legume cover crop, to support breeding and understanding of legume genomics.
Contribution
The first chromosome-level genome assembly for Vicia villosa var. glabrescens using PacBio HiFi and Hi-C technologies.
Findings
The genome assembly has a scaffold N50 of 4.69 Mb and 96.05% BUSCO completeness.
Significant expansion of LTR-RTs and MITEs was observed in V. villosa var. glabrescens.
Gene family expansions related to trichome development were identified compared to V. villosa Roth.
Abstract
This study has, for the first time, completed the chromosome-level genome assembly of smooth wild pea (Vicia villosa var. glabrescens). This variety is an important leguminous cover crop and has attracted much attention due to its strong nitrogen fixation ability, high biomass, and wide adaptability. By integrating PacBio HiFi long-read sequencing and Hi-C chromatin conformation capture technology, a high-quality genome of 3.70 Gb in size was constructed. This genome has good continuity (with a scaffold N50 of 4.69 Mb), and high completeness (with a BUSCO completeness of 96.05%), and most of the sequences were successfully anchored to seven pseudo-chromosomes. This reference genome (named Vvill-gla1.0) provides an important resource for in-depth analysis of key agronomic traits of Vicia gladiata (such as seed dormancy and stress resistance), will strongly promote its molecular breeding…
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Taxonomy
TopicsChromosomal and Genetic Variations · Genetic and Environmental Crop Studies · Legume Nitrogen Fixing Symbiosis
