Project description:we compared the skin transcriptomes of the black- and white-coated region from the Boer and Macheng Black crossbred goat with black head and white body using the Illumina RNA-Seq method. Six cDNA libraries derived from skin samples of the white coat region (n = 3) and black coat region (n = 3) were constructed from three full-sib goats. On average, we obtained approximately 76.5 and 73.5 million reads for each skin sample of black coat and white coat, respectively, of which 75.39% and 76.05% reads were covered in the genome database. Our study provides insight into the transcriptional regulation of two distinct coat color that might serve as a key resource for understanding coat color pigmentation of goat.
Project description:The coat color of mammals is determined by the melanogenesis pathway, which is responsible for maintaining the balance between black-brown eumelanin and yellow-reddish phaeomelanin. It is also believed that the color of the bovine nose is regulated in a similar manner; however, the molecular mechanism underlying pigment deposition in the black nose has yet to be elucidated. The aim of the present study was to identify melanogenesis-associated genes that are differentially expressed in the black vs. yellow nose of native Korean cows.
2013-12-26 | GSE53657 | GEO
Project description:A Novel TYRP1 Mutation Associated with Brown Coat Color in Siberian Huskies
| PRJEB41991 | ENA
Project description:Coat color variation in domestic yak
Project description:The soybean (Glycine max) seed coat has distinctive, genetically programmed patterns of pigmentation and the recessive k1 mutation can epistatically overcome the dominant I and i-i alleles, which inhibit seed color by producing small interfering RNAs (siRNAs) targeting chalcone synthase (CHS) mRNAs. Small RNA sequencing of dissected regions of immature seed coats demonstrated that CHS siRNA levels cause the patterns produced by the i-i and i-k alleles of the I locus, which restrict pigment to the hilum or saddle region of the seed coat, respectively. To identify the K1 locus, we compared RNA-Seq data from dissected regions of two Clark isolines having similar saddle phenotypes mediated by CHS siRNAs but different genotypes (homozygous i-k K1 versus homozygous i-i k1). By examining differentially expressed genes, mapping information, and genome resequencing, we identified a 129-bp deletion in Glyma.11G190900 encoding Argonaute5 (AGO5), a member of the Argonaute family. Amplicon sequencing of several independent saddle pattern mutants from different genetic backgrounds revealed independent lesions affecting AGO5, thus establishing Glyma.11G190900 as the K1 locus. Non-functional AGO5 from k1 alleles leads to altered distributions of CHS siRNAs, thus explaining how the k1 mutation reverses the phenotype of the seed coat regions from yellow to pigmented, even in the presence of the normally dominant I or i-i alleles.
Project description:Coat color mainly reflects pigmentation resulting from melanin. Wool color is one of the most visible and heritable traits in sheep. Although several detailed molecular mechanisms involved in coat color have been elucidated, our understanding of differences in gene expression patterns of wool color-related genes in Chinese Merino (Junken type) is limited. We employed the Affymetrix microarray to identify differentially expressed genes. 122 genes were differentially expressed, consisting of 117 upregulated and 5 downregulated genes that were related to black/brown skin. The expression level of the BMP2, BMP4, TYRP1, LEPR, DCT, BMPR1A, and TP45A genes was validated by qRT-PCR, and the results coincided with those of microarray. The expression level of ASIP in the black/brown group was significantly lower than that of the white group, suggesting that this plays a key role in the regulation of wool pigmentation. Some cloned color genes (MITF, MC1R, GPR143, and KIT) showed no significant differences in expression levels between the black/brown- and white-skinned sheep. Functional annotation by using Gene Ontology (GO) showed that the differentially expressed genes enriched specific GO terms, particularly those relating to melanin biosynthesis and metabolic processes. KEGG pathway analysis indicated that the categories of tyrosine metabolism and melanogenesis pathway were enriched with differentially expressed genes. Taken together, the present study has shown that the tyrosine metabolism pathway plays an essential role in regulating wool color. The findings of this study may also be utilized in the elucidation of the molecular mechanisms and relationship between genes and wool color in Chinese Merino (Junken type). We used microarrays to detail the global programme of gene expression and identified distinct different expression genes of skin in different coat color Chinese Merino (Junken type).
Project description:The coat color of mammals is determined by the melanogenesis pathway, which is responsible for maintaining the balance between black-brown eumelanin and yellow-reddish phaeomelanin. It is also believed that the color of the bovine nose is regulated in a similar manner; however, the molecular mechanism underlying pigment deposition in the black nose has yet to be elucidated. The aim of the present study was to identify melanogenesis-associated genes that are differentially expressed in the black vs. yellow nose of native Korean cows. Experiment, Yellow nose vs. Black nose HanWoo