Zoological Survey of India, New Alipore, Kolkata, West Bengal, 700053, India.
Sci Rep. 2021 Jan 12;11(1):730. doi: 10.1038/s41598-020-76872-y.
The complete mitogenome of Himalayan black bear (Ursus thibetanus laniger) from Indian Himalayan region was assembled following the modified approach of mitochondrial baiting and mapping using the next-generation sequencing reads. The complete mitogenome was of 16,556 bp long, consisted of 37 genes that contained 13 protein-coding genes, 22 tRNAs, 2 rRNAs and 1 control region. The complete base composition was 31.33% A, 15.24% G, 25.45%C, and 27.98%T and gene arrangement was similar to the other sub-species of Asiatic black bear. The relative synonymous codon usage analysis revealed the maximum abundance of Isoleucine, Tyrosine, Leucine and Threonine. The assembled mitogenome of U. t. laniger exhibited 99% similarity with the mitogenomes of Himalayan black bear available from Nepal and Tibetan Plateau-Himalaya region. The findings of the present study has proven low depth sequencing data, adequate and highly efficient in rapid recovering the mitochondrial genome by overcoming the conventional strategies of obtaining long-range PCR and subsequently drawing phylogenetic inferences.
采用改良的线粒体诱饵和映射方法,利用下一代测序reads,组装了来自印度喜马拉雅地区喜马拉雅黑熊(Ursus thibetanus laniger)的完整线粒体基因组。完整的线粒体基因组长 16556bp,由 37 个基因组成,包含 13 个蛋白质编码基因、22 个 tRNA、2 个 rRNA 和 1 个控制区。完整的碱基组成是 31.33%A、15.24%G、25.45%C 和 27.98%T,基因排列与其他亚洲黑熊亚种相似。相对同义密码子使用分析显示,亮氨酸、酪氨酸、亮氨酸和苏氨酸的丰度最高。组装的 U. t. laniger 线粒体基因组与来自尼泊尔和青藏高原喜马拉雅地区的喜马拉雅黑熊线粒体基因组具有 99%的相似性。本研究的结果证明,低深度测序数据在克服传统的长距离 PCR 获得和随后进行系统发育推断的策略方面,通过足够和高效的方式,快速恢复线粒体基因组。