College of Life Sciences, Shaanxi Normal University, Xi'an, China.
School of Biological and Environmental Engineering, Xi'an University, China.
Genome Biol Evol. 2021 Dec 1;13(12). doi: 10.1093/gbe/evab275.
Silver pheasant (Lophura nycthemera) belongs to Phasianidae, Galliformes, which exhibits high subspecific differentiation. In this study, we assembled a novel genome based on 98.42 Gb of Illumina sequencing data and 30.20 Gb of PacBio sequencing data. The size of the final assembled genome was 1.01 Gb, with a contig N50 of 6.96 Mb. Illumina paired-end reads (94.96%) were remapped to the contigs. The assemble genome shows high completeness, with a complete BUSCO score of 92.35% using the avian data set. A total of 16,747 genes were predicted from the generated assembly, and 16,486 (98.44%) of the genes were annotated. The average length of genes, exons, and introns were 19,827.53, 233.69, and 1841.19 bp, respectively. Noncoding RNAs included 208 miRNAs, 40 rRNAs, and 264 tRNAs, and a total of 189 pseudogenes were identified; 116.31 Mb (11.47%) of the genome consisted of repeat sequences, with the greatest proportion of LINEs. This assembled genome provides a valuable reference genome for further studies on the evolutionary history and conversion genetics of L. nycthemera and the phylogenomics of the Galliformes lineage.
白鹇(Lophura nycthemera)属于雉科,鸡形目,具有高度的亚种分化。本研究基于 98.42 Gb 的 Illumina 测序数据和 30.20 Gb 的 PacBio 测序数据,组装了一个新的基因组。最终组装的基因组大小为 1.01 Gb,contig N50 为 6.96 Mb。Illumina 配对末端读数(94.96%)被重新映射到 contigs 上。组装基因组的完整性很高,使用鸟类数据集的完整 BUSCO 评分为 92.35%。从生成的组装体中预测了 16747 个基因,其中 16486 个(98.44%)基因被注释。基因、外显子和内含子的平均长度分别为 19827.53、233.69 和 1841.19 bp。非编码 RNA 包括 208 个 miRNA、40 个 rRNA 和 264 个 tRNA,共鉴定出 189 个假基因;基因组的 116.31 Mb(11.47%)由重复序列组成,其中 LINEs 的比例最大。这个组装的基因组为进一步研究白鹇的进化历史和转化遗传学以及鸡形目谱系的系统发生基因组学提供了有价值的参考基因组。