Examinando por Materia "Bos Taurus"

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The complete mitochondrial genome of a Peruvian creole cattle (Bos taurus) and its phylogenetic analysis
(Wageningen Academic Publishers, 2023-02-09) Arbizu Berrocal, Carlos Irvin; Ferro Mauricio, Rubén Darío; Chávez Galarza, Julio César; Vásquez Pérez, Héctor Vladimir; Maicelo Quintana, Jorge Luis; Poemape Tuesta, Carlos Augusto; Gonzáles, J.; Quilcate Pairazamán, Carlos Enrique; Corredor Arizapana, Flor Anita
The population of Peruvian creole cattle (PCC) is decreasing mainly due to the introduction of more productive breeds in recent years. We report the complete mitochondrial genome sequence of a PCC bull for the first time. This genome was 16,339 bp in length with the base composition 31.43% A, 28.64% T, 26.81% C, and 13.12% G. It contained 13 protein-coding genes, 2 ribosomal RNA genes, 22 transfer RNA genes and a control region. Among the 37 genes, 28 were positioned on the H-strand and 9 were positioned on the L-strand. The most frequently used codons were CUA (Leucine), AUA (Isoleucine), AUU (Isoleucine), AUC (Isoleucine) and ACA (Threonine). Maximum likelihood analysis clearly demonstrated that PCC are strongly related to a native African breed, giving insights into the maternal ancestry of PCC. The annotated mitochondrial genome of PCC would serve as an important genetic data set for further breeding work and conservation strategies.
First draft genome assembly of the Peruvian creole cattle breed (Bos taurus) and its comparative genomics among the Bovinae subfamily
(MDPI, 2022-08-18) Estrada Cañari, Richard; Corredor Arizapana, Flor Anita; Figueroa Venegas, Deyanira Antonella; Salazar Coronel, Wilian; Quilcate Pairazamán, Carlos Enrique; Vásquez Pérez, Héctor Vladimir; Maicelo Quintana, Jorge Luis; Gonzales, Jhony; Arbizu Berrocal, Carlos Irvin
The Peruvian creole cattle (PCC) is a neglected breed, and is an essential livestock resource in the Andean region of Peru. To develop a modern breeding program and conservation strategies for the PCC, a better understanding of the genetics of this breed is needed. We sequenced the whole genome of the PCC using a paired-end 150 strategy on the Illumina HiSeq 2500 platform, obtaining 320 GB of sequencing data. The obtained genome size of the PCC was 2.77 Gb with a contig N50 of 108Mb and 92.59% complete BUSCOs. Also, we identified 40.22% of repetitive DNA of the genome assembly, of which retroelements occupy 32.39% of the total genome. A total of 19,803 protein-coding genes were annotated in the PCC genome. We downloaded proteomes and genomes of the Bovinae subfamily, and conducted a comparative analysis with our draft genome. Phylogenomic analysis showed that PCC is related to Bos indicus. Also, we identified 7,746 family genes shared among the Bovinae subfamily. This first PCC genome is expected to contribute to a better understanding of its genetics to adapt to the tough conditions of the Andean ecosystem, and evolution.
Ganancia de peso de toretes cruzados (Bos taurus con Bos indicus) en sistemas intensivos del trópico
(Universidad de Tarapacá, 2023-09-01) Linares Rivera, Jaime Lizardo; Leveau Villacorta, Cayo; Farje Alva, Kennedy Pacífico; Ampuero Trigoso, Gustavo; Milla Pino, Manuel Emilio; Saucedo Uriarte, José Américo
El objetivo del estudio fue evaluar la ganancia de peso de toretes cruzados (Bos taurus con Bos indicus) en sistemas intensivos en el trópico del Perú. Un total de 20 toretes de 11 meses de edad con peso promedio de 155,7 ± 25,9 kg fueron distribuidos aleatoriamente en dos tratamientos. Un grupo recibió alimento balanceado y el otro se basó en pastoreo convencional. Se determinó el peso y ganancia de peso mensual. Se aplicó la prueba T-student para dos muestras independientes. Se encontraron diferencias significativas para pesos y ganancias de peso (p < 0,05), constatándose superioridad de peso en los animales que fueron alimentados con concentrado respecto a los bovinos que fueron pastoreados. En conclusión, a nivel de trópico los bovinos cruzados resultaron superiores en ganancia de peso, por lo que es necesario seguir mejorando los pastizales naturales, suplementar con concentrado a base de insumos locales y hacer evaluaciones con pastizales cultivados.
Paternal ancestry of Peruvian creole cattle inferred from Y-chromosome analysis
(El Sevier, 2020-12-15) Yalta Macedo, Claudia Esther; Veli Rivera, Eudosio Amancio; Díaz Ortiz, Gerardo Ramón; Vallejo Trujillo, Adriana
The aim of this study was the identification of the genetic diversity and paternal origin of Peruvian creole cattle. A panel of 7 Y-chromosome specific markers (INRA189, UMN0103, BM861, UMN307, BYM-1, DDX3Y_1STR and ZFY10) were analyzed in 229 cattle from 6 regions of the Peruvian highlands. The creole cattle exhibited low genetic diversity (H= 0.50) mostly explained by within-population variation (98%) and absence of population structure (FST = 0.019) in the analyzed regions. These results are in concordance to other studies in Spanish cattle populations. The overall frequency and distribution of the major B. taurus haplogroups: Y1 (19%) and Y2 (81%), suggests that Peruvian creole cattle derived from the Iberian Peninsula cattle. Furthermore, our results some degree of male-mediated African cattle influence in the Peruvian creoles, supporting the findings of other studies in South American creole cattle populations. Altogether, our results revealed unique genetic characteristics of Peruvian creole cattle that may have important implications for future conservation programs.
The Complete Mitochondrial Genome of a Neglected Breed, the Peruvian Creole Cattle (Bos taurus), and Its Phylogenetic Analysis
(MDPI, 2022-06-06) Arbizu Berrocal, Carlos Irvin; Ferro Mauricio, Rubén Darío; Chávez Galarza, Julio César; Vásquez Pérez, Héctor Vladimir; Maicelo Quintana, Jorge Luis; Poemape Tuesta, Carlos Augusto; Gonzales, Jhony; Quilcate Pairazamán, Carlos Enrique; Corredor Arizapana, Flor Anita
Cattle spread throughout the American continent during the colonization years, originating creole breeds that adapted to a wide range of climate conditions. The population of creole cattle in Peru is decreasing mainly due to the introduction of more productive breeds in recent years. During the last 15 years, there has been significant progress in cattle genomics. However, little is known about the genetics of the Peruvian creole cattle (PCC) despite its importance to (i) improving productivity in the Andean region, (ii) agricultural labor, and (iii) cultural traditions. In addition, the origin and phylogenetic relationship of the PCC are still unclear. In order to promote the conservation of the PCC, we sequenced the mitochondrial genome of a creole bull, which also possessed exceptional fighting skills and was employed for agricultural tasks, from the highlands of Arequipa for the first time. The total mitochondrial genome sequence is 16,339 bp in length with the base composition of 31.43% A, 28.64% T, 26.81% C, and 13.12% G. It contains 13 protein-coding genes, 2 ribosomal RNA genes, 22 transfer RNA genes, and a control region. Among the 37 genes, 28 were positioned on the H-strand and 9 were positioned on the L-strand. The most frequently used codons were CUA (leucine), AUA (isoleucine), AUU (isoleucine), AUC (isoleucine), and ACA (threonine). Maximum likelihood reconstruction using complete mitochondrial genome sequences showed that the PCC is related to native African breeds. The annotated mitochondrial genome of PCC will serve as an important genetic data set for further breeding work and conservation strategies.