Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Why Pashmina Goat Produces Long Hair-fiber and Barbari doesn’t: A Differential Gene Expression Study

Version 1 : Received: 4 March 2021 / Approved: 5 March 2021 / Online: 5 March 2021 (11:50:26 CET)

How to cite: Saif, R.; Mahmood, T.; Ejaz, A.; Zia, S. Why Pashmina Goat Produces Long Hair-fiber and Barbari doesn’t: A Differential Gene Expression Study. Preprints 2021, 2021030187 (doi: 10.20944/preprints202103.0187.v1). Saif, R.; Mahmood, T.; Ejaz, A.; Zia, S. Why Pashmina Goat Produces Long Hair-fiber and Barbari doesn’t: A Differential Gene Expression Study. Preprints 2021, 2021030187 (doi: 10.20944/preprints202103.0187.v1).

Abstract

The Pashmina and Barbari are two famous goat breeds found in the wide areas of the Indo-Pak region. Pashmina is famous for its long hair-fiber (Cashmere) production while Barbari is not-selected for this trait. So, the mRNA expression profiling in the skin samples of both breeds would be an attractive and judicious approach for detecting putative genes involved in this valued trait. Here, we performed differential gene expression analysis on publicly available RNA-Seq data from both breeds. Out of 44,617,994 filtered reads of Pashmina and 55,995,999 of Barbari which are 76.48% and 73.69% mapped to the ARS1 reference transcriptome assembly respectively. A pairwise comparison of both breeds resulted in 47,159 normalized expressed transcripts while 8,414 transcripts are differentially expressed above the significant threshold. Among these, 4,788 are upregulated in Pashmina while 3,626 transcripts are upregulated in Barbari. Fifty-nine transcripts harbor 57 genes including 32 LOC genes and 24 are annotated genes which were selected on the basis of TMM counts > 500. Genes with ectopic expressions other than uncharacterized and LOC symbol genes are Keratins (KRT) and Keratin Associated Proteins (KRTAPs), CystatinA&6, TCHH, SPRR4, PPIA, SLC25A4, S100A11, DMKN, LOR, ANXA2, PRR9 and SFN. All of these genes are likely to be involved in keratinocyte differentiation, sulfur matrix proteins, dermal papilla cells, hair follicles proliferation, hair curvature, wool fiber diameter, hair transition, hair shaft differentiation and its keratinization. These differentially expressed reported genes are critically valuable for enhancing the quality and quantity of the pashmina fiber and overall breed improvement. This study will also provide important information on hair follicle differentiation for further enrichment analyses and introducing this valued trait to other goat breeds as well.

Keywords

Transcriptome analysis; Capra hircus; Differential gene expression; Pashmina goat; Barbari goat; RNA-seq

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