Allelic Frequency of Kappa-Casein Locus (Asp148/Ala) in F1: Simmental (Bos Taurus) X Ongole Grade (Bos Indicus)

This study was conducted to detect the genetic variants (single nucleotide polymorphism) of kappa-casein locus (Asp148/Ala) in F1: Simmental (Bos taurus) x Ongole grade (Bos indicus), SIMPO. Genomic DNA was isolated from blood sample of 40 SIMPO (21 males and 19 females). A 780 bp specific fragment of kappa-casein gene spanning from the forth exon region (517 bp) to forth intron (263 bp) was successfully amplified. The result of the PCR-RFLP (Polymerase Chain Reaction - Restriction Fragment Length Polymorphisms) analysis using HindIII enzyme showed that two genotypes (AA and AB) were found at this locus in SIMPO. The frequencies of A and B alleles in SIMPO were 0.79 and 0.21, respectively. The frequency lies between B. taurus (Simmental) and B. indicus group

In the search of the polled locus in a Bos taurus x Bos indicus population.

The objective in this study was to identify regions and SNPs associated with the polled/horned phenotype in a composite Bos taurus x Bos indicus breed (Canchim).ISAFG 2013. AB.20

Avaliação de matrizes bovinas no Pantanal.

No início do século XX inicou-sse a introdução de gado zebu, de origem indiana (Bos taurus indicus) no Pantanal. A partir de então, por meio de cruzamentos contínuos, as raças zebuínas absorveram praticamente toda a população do Tucura (Bos taurus taurus) que era o tipo predominante na região, introduzido no Século XVI (Mazza et al., 1994). Atualmente, o rebanho existente no Pantanal é zebuíno com predominância da raça Nelore, embora, recentemente, foram registradas algumas iniciativas com relação ao uso de raças compostas e de cruzamentos entre raças européias e zebuínas (Rosa, 1997). A população total é de aproximadamente 3,8 milhões de cabeças, sendo 2,8 milhões no Pantanal Sul Mato-Grossense e 1 milhão no Pantanal do Estado de Mato Grosso.bitstream/item/79547/1/COT52.pd

An attempt to correlate cattle breed origins and diseases associated with or transmitted by the tick Amblyomma variegatum in the French West Indies

A l'aide de données biologiques et de la recherche historique, on a essayé d'expliquer la différence, en ce qui concerne la résistance et la sensibilité aux maladies transmises par (cowdriose) ou associées à (dermatophilose) la tique Amblyomma variegatum, entre deux races bovines des Antilles françaises : la race Créole hybride de la Guadeloupe et le zébu Brahman de la Martinique. Les polymorphismes de 5 systèmes génétiques indépendants (hémoglobine érythrocytaire, albumine et transferrine du sérum, la région classe I du complexe BolA et le gène gamma S cristallin) ont été étudiés chez différentes races, à savoir des Bos taurus d'Europe et d'Afrique, des Bos indicus d'Afrique de l'Ouest et de l'Est, le Brahamn de la Martinique et le Créole de la Guadeloupe. Par comparaison des fréquences de différents allèles de ces 5 loci polymorphiques non liés et à l'aide de deux matrices mathématiques différentes de NEI et de CAVALLI-SFORZA, on a établi les distances génétiques entre ces races. Il apparaît clairement que le bovin Créole de la Guadeloupe est dans une position intermédiaire entre le Bos taurus N'Dama de l'Afrique de l'Ouest et le Brahma

First molecular data of the Borneo Banteng Bos Javanicus lowi from Sabah, Borneo

Phylogenetic relationships among three subspecies of banteng, Burma banteng Bos javanicus birmanicus in mainland Southeast Asia, Javan banteng Bos javanicus javanicus in Java, and Bornean banteng Bos javanicus lowi in Borneo, and the presence/absence of interbreeding between wild Bornean banteng and domestic cattle in Sabah, Malaysia, were investigated by partial sequences of cytochrome b and D-loop of mitochondrial DNA. The results show that genetic distance of the Bornean banteng are relatively close to the gaur Bos gaurus/gayal Bos frontalis (the cytochrome b, 0.004–0.025; the D-loop, 0.012–0.021) followed by Burma banteng (the cytochrome b, 0.027–0.035; the D-loop, 0.040–0.045), and kouprey Bos sauveli (the cytochrome b, 0.031–0.035; the D-loop, 0.037–0.042). There are much greater distances between Bornean banteng and domestic cattle, Bos taurus and Bos indicus (the cytochrome b, 0.059–0.076; the D-loop, 0.081–0.090). These results suggest that the Bornean banteng diverged genetically from other banteng subspecies and that the wild Bornean banteng from this study are pure strain and have high conservation value

Consecuencias del estrés calórico sobre la reproducción del ganado vacuno

Heat stress represents one of the major environmental factors that adversely affect the reproductive performance of cattle. In this paper the behavioral adjustments, physical mechanisms and physiological responses to heat loss are described; bos indicus adaptive advantages with respect to bos Taurus, pathophysiology of heat stress and heat stress effects in animal reproduction, both the male and the female.El estrés calórico representa unos de los principales factores del medio ambiente que repercuten negativamente en el desempeño reproductivo del ganado vacuno. En este trabajo se describen los ajustes conductuales, mecanismos físicos y respuestas fisiológicas para la pérdida calórica; ventajas adaptativas del bos indicus con respecto al bos Taurus, fisiopatología del estrés calórico y repercusiones del estrés calórico en la reproducción animal, tanto en el macho como en la hembra

Description de Rhipicephalus moucheti n. sp. (groupe de Rh. sanguineus ; acariens, Ixodoidea)

Rh. moucheti diffère de toutes les espèces du groupe de Rh. sanguineus par les plaques adanales en faucilles du mâle; la femelle est inconnue; les exemplaires connus sont rares, originaires des savanes tropicales nord-soudaniennes (Cameroun) et subtropicales sud-soudaniennes (Dahomey); hôtes: Bos taurus, Erythrocebus pata

Caractéristiques spermatiques du taureau Baoulé (Bos taurus taurus) au Burkina Faso

Cette étude a porté sur 9 taureaux Baoulé. Une forte incidence pathologique en saison humide perturbe l'ensemble des caractéristiques spermatiques. Ces caractéristiques, pour les animaux sains, sont les suivantes : volume = 2,4 plus ou moins 1,5 ml; motilité = 3,8 plus ou moins 0,8; numération = 1,05 plus ou moins 0,40 10000000/mm3; PSI = 80 plus ou moins 23 p. 100; anomalies majeures = 3,8 plus ou moins 4,7 p. 100. Il existe une corrélation positive entre l'hygrométrie et les anomalies majeures de la tête et mineures de la tête et de la queue (p < 0,01) et une corrélation positive entre la température maximale et les anomalies majeures de la pièce intermédiaire et de la queue. Les autres caractéristiques spermatiques ne montrent pas de variations saisonnière

A Partial African Ancestry for the Creole Cattle Populations of the Caribbean

Seventy-eight cattle samples from three Creole Caribbean islands and one Brazilian breed were analyzed for sequence variation in the hypervariable segment of the mitochondrial DNA control region. Seventy-three samples displayed Bos taurus haplotypes, and five samples exhibited haplotypes that were of Bos indicus ancestry. Phylogenetic analysis revealed that all sampled B. taurus sequences fell into two distinct clusters with separate African and European origins. European sequences were encountered in each population; however, the distribution of African haplotypes was uneven, with the highest proportion of African influence found in the Guadeloupe Creole. The reduced levels of African haplotypic variation within the Caribbean and Brazilian are consistent with prior founder effects. Additionally, genetic variation at three microsatellite loci illustrated African influence uniquely in the Guadeloupe Creole. Collectively, the data suggest that this African influence is, at least in part, attributable to the historical importation of African cattle to the Americas. Furthermore, alleles of B. indicus ancestry were detected at appreciable frequencies in all Caribbean Creole populations and may reflect zebu introgressions from either West Africa or the Indian subcontinen