Dataset Information

Mitogenome characterization and phylogeny of Huzhu white yak (Bos grunniens) in China.

ABSTRACT: White yak is a unique and precious economic livestock animal in the world. In this study, the mitogenome of Huzhu white yak was firstly sequenced using Illumina high-throughput sequencing technique and then the assembly was annotated. We also explored mitogenome characterization and phylogeny of Huzhu white yak. Our results showed that the mitogenome of Huzhu white yak is a circular molecule with 16,323bp length including a non-coding control region (D-loop), two ribosomal RNA genes (12S rRNA and 16S rRNA), 22 transfer RNA genes and 13 protein-coding genes. The contents of four nucleotides (A, G, C and T) were 33.71%, 13.21%, 25.80%, and 27.28%, respectively, yielding a lower GC content (39.01%) than AT (60.99%). Phylogenetic analysis suggested that Huzhu white yak possessed the closest relationships with Huanhu, Jiulong, Datong, Jinchuan, Sibu, Ashdan and Pali yak breeds, and closer to wild yak and Bazhou breed.

SUBMITTER: Luo J

PROVIDER: S-EPMC9176365 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature

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Mitogenome characterization and phylogeny of Huzhu white yak (<i>Bos grunniens</i>) in China.

Luo Jing J Li Guangzhen G Li Ruizhe R Yang Yongqing Y He Decang D Liu Wenxian W Yosri Mohammed M Ma Zhijie Z

Mitochondrial DNA. Part B, Resources 20220607 6

White yak is a unique and precious economic livestock animal in the world. In this study, the mitogenome of Huzhu white yak was firstly sequenced using Illumina high-throughput sequencing technique and then the assembly was annotated. We also explored mitogenome characterization and phylogeny of Huzhu white yak. Our results showed that the mitogenome of Huzhu white yak is a circular molecule with 16,323bp length including a non-coding control region (D-loop), two ribosomal RNA genes (<i>12S rRNA ...[more]

PMID: 35692641

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Project description:Background and aimMitochondrial genome has aseries of characteristics such as simple structure, no recombination, maternalinheritance, stable structure, fast evolution rate, and high copy number. Moreover, it is easy to be sequenced,contains high-resolution phylogenetic information, and exists in a wide rangeof taxa. Therefore, it is widely used in the study of biological phylogeny. Atpresent, phylogenetic studies focus mainly on D-loop region, cytochrome b gene,and protein-coding sequence. Phylogenetic studies using the mitochondrialcomplete sequence are rarely reported in yak. Therefore, the present studyaimed to construct phylogenetic tree using yak mitochondrial complete sequenceand compare the subsequent results with previous findings obtained usingpartial sequences.ResultsComplete mitochondrial sequences of five yakpopulations from Qinghai and Xinjiang were obtained. The mitotype diversity ofthe five populations was Xueduo yak (0.992 ± 0.015), Pamir yak (0.990 ± 0.014),Yushu yak (0.963 ± 0.033), Qilian yak (0.948 ± 0.036), and Huanhu yak (0.905 ±0.048), which showed a higher mitotype diversity compared with other breeds fromthe previous reports, including Jiulong yak, Maiwa yak, Zhongdian yak, andTianzhu yak. A total of 78 mitotypes were obtained from 111 individuals. Amongthese, Yushu yak, Huanhu yak, Xueduo yak, and Qilian yak all shared mitotypes,but the Pamir yak did not share mitotypes with these four populations.Phylogenetic analysis showed that yak populations were separable into threedistinct branches. The analysis identified a new phylogenetic branch containingboth wild and domestic yaks. The 155 mitotypes found in 206 individuals weredivided into 3 haplogroups by mitotype clustering. Thehaplogroup was not associated with the geographical distribution of yaks. Theyaks in the same population or the same ecological environment were distributedin different haplogroups. Among the threehaplogroups, haplogroup A and haplogroup B showed a star-shaped distribution ofmitotypes. The central mitotypes were widely distributed and had a highfrequency.ConclusionsThegenetic diversity of yaks in Qinghai was high. Both domestic and wild yaks clusteredinto three branches.

Project description:BackgroundMethane emissions by methanogen from livestock ruminants have significantly contributed to the agricultural greenhouse gas effect. It is worthwhile to compare methanogen from "energy-saving" animal (yak) and normal animal (cattle) in order to investigate the link between methanogen structure and low methane production.ResultsDiversity of methanogens from the yak and cattle rumen was investigated by analysis of 16S rRNA gene sequences from rumen digesta samples from four yaks (209 clones) and four cattle (205 clones) from the Qinghai-Tibetan Plateau area (QTP). Overall, a total of 414 clones (i.e. sequences) were examined and assigned to 95 operational taxonomic units (OTUs) using MOTHUR, based upon a 98% species-level identity criterion. Forty-six OTUs were unique to the yak clone library and 34 OTUs were unique to the cattle clone library, while 15 OTUs were found in both libraries. Of the 95 OTUs, 93 putative new species were identified. Sequences belonging to the Thermoplasmatales-affiliated Linage C (TALC) were found to dominate in both libraries, accounting for 80.9% and 62.9% of the sequences from the yak and cattle clone libraries, respectively. Sequences belonging to the Methanobacteriales represented the second largest clade in both libraries. However, Methanobrevibacter wolinii (QTPC 110) was only found in the cattle library. The number of clones from the order Methanomicrobiales was greater in cattle than in the yak clone library. Although the Shannon index value indicated similar diversity between the two libraries, the Libshuff analysis indicated that the methanogen community structure of the yak was significantly different than those from cattle.ConclusionThis study revealed for the first time the molecular diversity of methanogen community in yaks and cattle in Qinghai-Tibetan Plateau area in China. From the analysis, we conclude that yaks have a unique rumen microbial ecosystem that is significantly different from that of cattle, this may also help to explain why yak produce less methane than cattle.

Dataset Information

Mitogenome characterization and phylogeny of Huzhu white yak (Bos grunniens) in China.

Publications

Mitogenome characterization and phylogeny of Huzhu white yak (<i>Bos grunniens</i>) in China.

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