Time filter

Source Type

Beltsville, MD, United States

Zhang L.,Northwest University, China | Yang M.,Northwest University, China | Li C.,Bovine Functional Genomics Laboratory | Xu Y.,Northwest University, China | And 5 more authors.
Animal Genetics | Year: 2014

In cattle, the ADIPOQ gene is located in the vicinity of the quantitative trait locus (QTL) affecting marbling, the ribeye muscle area and fat thickness on BTA1. In our study, a novel variable duplication (NW-003103812.1:g.9232067- 9232133dup) in the bovine ADIPOQ promoter region was identified and genotyped in seven Chinese cattle breeds. Using a reporter assay, we demonstrated that g.9232067-9232133dup decreased the basal transcriptional activity of the ADIPOQ gene in the 3T3-L1 and C2C12 cells. Furthermore, g.9232067-9232133dup suppressed the mRNA expression of the gene in adipose and muscle tissues. An association analysis indicated that the incremental variable duplication was associated with body measurements. © 2013 Stichting International Foundation for Animal Genetics. Source

Zhou Y.,Northwest University, China | Sun J.,Northwest University, China | Li C.,Bovine Functional Genomics Laboratory | Wang Y.,Jiangsu University | And 6 more authors.
PLoS ONE | Year: 2014

Background: Adipose tissue has long been recognized to play an extremely important role in development. In bovines, it not only serves a fundamental function but also plays a key role in the quality of beef and, consequently, has drawn much public attention. Age and sex are two key factors that affect the development of adipose tissue, and there has not yet been a global study detailing the effects of these two factors on expressional differences of adipose tissues. Results: In this study, total RNA from the back fat of fetal bovines, adult bulls, adult heifers and adult steers were used to construct libraries for Illumina next-generation sequencing. We detected the expression levels of 12,233 genes, with over 3,000 differently expressed genes when comparing fetal and adult patterns and an average of 1000 differently expressed genes when comparing adult patterns. Multiple Gene Ontology terms and pathways were found to be significantly enriched for these differentially expressed genes. Of the 12,233 detected genes, a total of 4,753 genes (38.85%) underwent alternative splicing events, and over 50% were specifically expressed in each library. Over 4,000 novel transcript units were discovered for one library, whereas only approximately 30% were considered to have coding ability, which supplied a large amount of information for the lncRNA study. Additionally, we detected 56,564 (fetal bovine), 65,154 (adult bull), 78,061 (adult heifer) and 86,965 (adult steer) putative single nucleotide polymorphisms located in coding regions of the four pooled libraries. Conclusion: Here, we present, for the first time, a complete dataset involving the spatial and temporal transcriptome of bovine adipose tissue using RNA-seq. These data will facilitate the understanding of the effects of age and sex on the development of adipose tissue and supply essential information towards further studies on the genomes of beef cattle and other related mammals. Source

Foye-Jackson O.T.,U.S. Department of Agriculture | Foye-Jackson O.T.,Office of Applied Research and Safety Assessment | Long J.A.,U.S. Department of Agriculture | Bakst M.R.,U.S. Department of Agriculture | And 5 more authors.
Poultry Science | Year: 2011

The sperm storage tubules (SST) of theturkey hen, which are located in the uterovaginal junction(UVJ) of the oviduct, maintain viable sperm for upto 10 wk after a single insemination. The mechanisms ofthis in vivo sperm storage are poorly understood. Ourobjective was to evaluate mRNA and protein expressionof avidin and 2 avidin-associated factors, avidinrelatedprotein-2 (AVR2) and progesterone receptor, inthe oviducts of 2 different lines to determine the extentto which they were sperm responsive and tissue specific.At 38 wk of age, Hybrid Grade Maker and Converterturkey hens were artificially inseminated with dilutedsemen (AI) or were sham-inseminated with extenderalone (SI). Forty-eight hours after insemination, total RNA was extracted from the UVJ epithelium (containingSST) and vaginal epithelium (VGE) of SI and AIhens. Real time-polymerase chain reaction data showeda clear tissue region-specific effect on gene expressionin the turkey hen oviduct, with much greater (P <0.0001) expression in the UVJ compared with VGE regionfor avidin and AVR2 mRNA in both lines and forprogesterone receptor mRNA in the Converter line. Incontrast to real-time PCR data, in situ hybridizationof SI and AI tissues showed that the presence of spermincreased avidin mRNA in the SST and UVJ surfaceepithelium in the Converter hens. Immunohistochemistryconfirmed the presence of avidin protein in theepithelium of the UVJ in both lines; however, whereasavidin protein was localized in the SST of SI-GradeMaker hens, this protein was not detected in the SST ofConverter hens. The upregulation of avidin and AVR2 mRNA within the sperm storage region indicates theinvolvement of avidin, and perhaps avidin analogs, inthe sustained storage of sperm in the SST, possiblythrough the binding of biotin to avidin. The absenceof avidin protein in the SST and VGE of Converterhens in the presence of increased mRNA may indicatea rapid turnover of protein. © 2011 Poultry Science Association Inc. Source

Zhang L.,Northwest University, China | Zhang L.,CAS Northwest Institute of Plateau Biology | Jia S.,Northwest University, China | Plath M.,Northwest University, China | And 5 more authors.
Genome Biology and Evolution | Year: 2015

Copy number variation (CNV) is an important component of genomic structural variation and plays a role not only in evolutionary diversification but also in domestication. Chinese cattle were derived from Bos taurus and Bos indicus, and several breeds presumably are of hybrid origin, but the evolution of CNV regions (CNVRs) has not yet been examined in this context. Here, we of CNVRs, mtDNA D-loop sequence variation, and Y-chromosomal single nucleotide polymorphisms to assess the impact of maternal and paternal B. taurus and B. indicus origins on the distribution of CNVRs in 24 Chinese domesticated bulls. We discovered 470 genome-wide CNVRs, only 72 of which were shared by all three Y-lineages (B. taurus: Y1, Y2; B. indicus: Y3), whereas 265 were shared by inferred taurine or indicine paternal lineages, and 228 when considering their maternal taurine or indicine origins. Phylogenetic analysis uncovered eight taurine/indicine hybrids, and principal component analysis on CNVs corroborated genomic exchange during hybridization. The distribution patterns of CNVRs tended to be lineage-specific, and correlation analysis revealed significant positive or negative cooccurrences of CNVRs across lineages. Our study suggests that CNVs in Chinese cattle partly result from selective breeding during domestication, but also from hybridization and introgression. © The Author(s) 2015. Source

Zhang L.,Northwest University, China | Jia S.,Northwest University, China | Jia S.,King Abdullah University of Science and Technology | Yang M.,Northwest University, China | And 10 more authors.
BMC Genomics | Year: 2014

Background: Copy number variations (CNVs) are a main source of genomic structural variations underlying animal evolution and production traits. Here, with one pure-blooded Angus bull as reference, we describe a genome-wide analysis of CNVs based on comparative genomic hybridization arrays in 29 Chinese domesticated bulls and examined their effects on gene expression and cattle growth traits.Results: We identified 486 copy number variable regions (CNVRs), covering 2.45% of the bovine genome, in 24 taurine (Bos taurus), together with 161 ones in 2 yaks (Bos grunniens) and 163 ones in 3 buffaloes (Bubalus bubalis). Totally, we discovered 605 integrated CNVRs, with more " loss" events than both " gain" and " both" ones, and clearly clustered them into three cattle groups. Interestingly, we confirmed their uneven distributions across chromosomes, and the differences of mitochondrion DNA copy number (gain: taurine, loss: yak & buffalo). Furthermore, we confirmed approximately 41.8% (253/605) and 70.6% (427/605) CNVRs span cattle genes and quantitative trait loci (QTLs), respectively. Finally, we confirmed 6 CNVRs in 9 chosen ones by using quantitative PCR, and further demonstrated that CNVR22 had significantly negative effects on expression of PLA2G2D gene, and both CNVR22 and CNVR310 were associated with body measurements in Chinese cattle, suggesting their key effects on gene expression and cattle traits.Conclusions: The results advanced our understanding of CNV as an important genomic structural variation in taurine, yak and buffalo. This study provides a highly valuable resource for Chinese cattle's evolution and breeding researches. © 2014 Zhang et al.; licensee BioMed Central Ltd. Source

Discover hidden collaborations