In the book “Buffalo Production and Research”, edited by Antonio Borghese by FAO Regional Office for Europe, REU Technical Series 67, the state of art of the research, development, products and market of buffalo species in the world, is presented. The 14 chapters analyse single themes of principal problems concerning the breeding, the selection, the reproduction,the feeding, the milk and meat quality, the buffalo’s pathologies.

Buffalo Production and Research

Understanding the genetic mechanisms of phenotypic variation in hybrids between domestic animals and their wild relatives may aid germplasm innovation. Here, we report the high-quality genome assemblies of a male Pamir argali (O. ammon polii, 2n = 56), a female Tibetan sheep (O. aries, 2n = 54), and a male hybrid of Pamir argali and domestic sheep, and the high-throughput sequencing of 425 ovine animals, including the hybrids of argali and domestic sheep. We detected genomic synteny between Chromosome 2 of sheep and two acrocentric chromosomes of argali. We revealed consistent satellite repeats around the chromosome breakpoints, which could have resulted in chromosome fusion. We observed many more hybrids with karyotype 2n = 54 than with 2n = 55, which could be explained by the selfish centromeres, the possible decreased rate of normal/balanced sperm, and the increased incidence of early pregnancy loss in the aneuploid ewes or rams. We identified genes and variants associated with important morphological and production traits (e.g., body weight, cannon circumference, hip height, and tail length) that show significant variations. We revealed a strong selective signature at the mutation (c.334C > A, p.G112W) in TBXT and confirmed its association with tail length among sheep populations of wide geographic and genetic origins. We produced an intercross population of 110 F2 offspring with varied number of vertebrae and validated the causal mutation by whole-genome association analysis. We verified its function using CRISPR-Cas9 genome editing. Our results provide insights into chromosomal speciation and phenotypic evolution and a foundation of genetic variants for the breeding of sheep and other animals.

https://genome.cshlp.org/content/32/9/1669.full.pdf

Genomic analyses of wild argali, domestic sheep, and their hybrids provide insights into chromosome evolution, phenotypic variation, and germplasm innovation

Domestication of the Bovini species (taurine cattle, zebu, yak, river buffalo and swamp buffalo) since the early Holocene (ca. 10 000 BCE) has contributed significantly to the development of human civilization. In this study, we review recent literature on the origin and phylogeny, domestication and dispersal of the three major Bos species - taurine cattle, zebu and yak - and their genetic interactions. The global dispersion of taurine and zebu cattle was accompanied by population bottlenecks, which resulted in a marked phylogeographic differentiation of the mitochondrial and Y-chromosomal DNA. The high diversity of European breeds has been shaped through isolation-by-distance, different production objectives, breed formation and the expansion of popular breeds. The overlapping and broad ranges of taurine and zebu cattle led to hybridization with each other and with other bovine species. For instance, Chinese gayal carries zebu mitochondrial DNA; several Indonesian zebu descend from zebu bull × banteng cow crossings; Tibetan cattle and yak have exchanged gene variants; and about 5% of the American bison contain taurine mtDNA. Analysis at the genomic level indicates that introgression may have played a role in environmental adaptation.

Evolution and domestication of the Bovini species

Heat-shock proteins (HSP) are conserved chaperones crucial for protein degradation, maturation, and refolding. These adenosine triphosphate dependent chaperones were classified based on their molecular mass that ranges between 10-100 kDA, including; HSP10, HSP40, HSP70, HSP90, HSPB1, HSPD, and HSPH1 family. HSPs are essential for cellular responses and imperative for protein homeostasis and survival under stress conditions. This study performed a computational analysis of the HSP protein family to better understand these proteins at the molecular level. Physiochemical properties, multiple sequence alignment, and phylogenetic analysis were performed for 64 HSP genes in the Bubalus bubalis genome. Four genes were identified as belonging to the HSP90 family, 10 to HSP70, 39 to HSP40, 8 to HSPB, one for each HSPD, HSPH1, and HSP10, respectively. The aliphatic index was higher for HSP90 and HSP70 as compared to the HSP40 family, indicating their greater thermostability. Grand Average of hydropathicity Index values indicated the hydrophilic nature of HSP90, HSP70, and HSP40. Multiple sequence alignment indicated the presence of highly conserved consensus sequences that are plausibly significant for the preservation of structural integrity of proteins. In addition, this study has expanded our current knowledge concerning the genetic diversity and phylogenetic relatedness of HSPs of buffalo with other mammalian species. The phylogenetic tree revealed that buffalo is more closely related to Capra hircus and distantly associated with Danio rerio. Our findings provide an understanding of HSPs in buffalo at the molecular level for the first time. This study highlights functionally important HSPs and indicates the need for further investigations to better understand the role and mechanism of HSPs.

https://www.mdpi.com/2073-4425/11/11/1388/pdf

Genomic Identification, Evolution and Sequence Analysis of the Heat-Shock Protein Gene Family in Buffalo.

The buffalo was domesticated around 3000-6000 years ago and has substantial economic significance as a meat, dairy, and draught animal. The buffalo has remained underutilized in terms of the development of a well-annotated and assembled reference genome de novo. It is mandatory to explore the genetic architecture of a species to understand the biology that helps to manage its genetic variability, which is ultimately used for selective breeding and genomic selection. Morphological and molecular data have revealed that the swamp buffalo population has strong geographical genomic diversity with low gene flow but strong phenotypic consistency, while the river buffalo population has higher phenotypic diversity with a weak phylogeographic structure. The availability of recent high-quality reference genome and genotyping marker panels has invigorated many genome-based studies on evolutionary history, genetic diversity, functional elements, and performance traits. The increasing molecular knowledge syndicate with selective breeding should pave the way for genetic improvement in the climatic resilience, disease resistance, and production performance of water buffalo populations globally.

Whole-Genome Sequencing and Characterization of Buffalo Genetic Resources: Recent Advances and Future Challenges

Domesticated buffaloes have been integral to rice-paddy agro-ecosystems for millennia, yet relatively little is known about the buffalo genomics. Here, we sequenced and assembled reference genomes for both swamp and river buffaloes and we re-sequenced 230 individuals (132 swamp buffaloes and 98 river buffaloes) sampled from across Asia and Europe. Beyond the many actionable insights that our study revealed about the domestication, basic physiology and breeding of buffalo, we made the striking discovery that the divergent domestication traits between swamp and river buffaloes can be explained with recent selections of genes on social behavior, digestion metabolism, strengths and milk production.

/pdf/understanding-divergent-domestication-traits-from-the-whole-2rtfxnihs2.pdf

Understanding divergent domestication traits from the whole-genome sequencing of swamp- and river-buffalo populations.

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Understanding divergent domestication traits from the whole-genome sequencing of swamp- and river-buffalo populations.