Effect of Supranutritional Dosage Selenium in Neonatal Goat Kids on Productive Performance, Physicochemical Profiles in Meat, Selenium Levels in Tissues, and Histopathological Findings.

Selenium (Se) is an essential element and antioxidant that catalyzes the destruction of hydrogen peroxide formed during cellular oxidative metabolism. Doses of Se as selenomethionine (SeMe) by oral route are 0.1-0.3 mgSe/kg DM, while the dose by parenteral route with sodium selenite (Na2SeO3) is 0.1 mgSe/BW. The effects of supranutritional Se supplementation on normal kids have rarely been studied. The objective of the study was to evaluate both Se sources on growth performance, Se in tissues, histopathological findings, and meat characteristics. Forty-five kids of the Pastoreña breed with 25-day age were distributed (4.7 ± 1.13 kg) in three treatments: a) control group, C: consumption with goat milk (GM: containing 0.135 mgSe/g); b) NaSe: GM plus Na2SeO3 injectable, 0.25 mgSe/kg BW; c) SeMe: GM plus oral dosage, 0.3 mgSe as SeMe daily. Fifteen animals per treatment were slaughtered at 7, 14, and 21 days. Feed conversion improved (P < 0.05) with Se supplement (P < 0.05) at 7 and 14 days. SeMe had higher protein and fat meat content (P < 0.05). SeMe increased Se liver at 14 and 21 days. NaSe and SeMe had higher (P < 0.05) levels of Se kidney. SeMe-21d showed 42% mononuclear and periportal cell infiltration lesions. In conclusion, Se administered through milk in goat kids was insufficient to prevent nutritional muscular dystrophy. The supranutritional dose of 0.25 mg/kg as NaSe was sufficient to maintain the Se level in tissues. SeMe increased Se liver and kidney efficiently. Both Se sources improved the bioavailability of the mineral in kids.

Genetic Characterization of a Sheep Population in Oaxaca, Mexico: The Chocholteca Creole.

Creole sheep in México have undergone crossbreeding, provoking the loss of genetic variability. The objective of the present study is to determine the intra-racial genetic diversity, the genetic relationship with other genotypes, and the populational substructure of the Oaxacan Creole sheep. Twenty-nine blood samples were obtained of Creole sheep of the Oaxaca Mixteca region in México. A genetic analysis was made with 41 microsatellites recommended for studies of genetic diversity in sheep. An analysis was made of genetic diversity, populational structure, and genetic distance with 27 other sheep populations. The study found 205 alleles with a range of 2 to 9 by locus and an effective number of 3.33. The intra-racial analysis showed a moderate genetic diversity with values of expected heterozygosity of 0.686 and observed of 0.756, a mean polymorphic information content of 0.609, and a mean coefficient of consanguinity of -0.002. In interracial genetic diversity for the coefficients of consanguinity, the values were FIS = 0.0774, FIT = 0.16993, and FST = 0.10028, showing an elevated genetic distance with other creole breeds, but close to Argentine Creole, to another Creole of México and the Spanish Merino. Its genetic structure showed that it does not have any populational subdivision nor mixes with the others analyzed. It is concluded that it is a distinct and isolated population and is proposed as the creole breed "Chocholteca" for its conservation.

Oxidative status and fertility of ewes supplemented coffee pulp during estrous ¤ synchronization and early pregnancy / Estado oxidativo y fertilidad en ovejas suplementadas con pulpa de café durante la sincronización estral y gestación temprana / Estado oxidativo e fertilidade nas ovelhas suplementadas com a polpa de café durante sincronização do estro e gestação inicial

Summary Background: it is known that coffee pulp can modify the oxidative status and fertility in dairy cows. Objective: to evaluate the effect of dietary supplementation with coffee pulp on the antioxidant capacity, lipid oxidation and reproductive characteristics of ewes during estrous synchronization and early gestation. Methods: forty Dorset-Suffolk crossbred ewes with 3 or 4 parturitions were allocated to two treatments: T0 (n = 21), ewes supplemented with 450 g of a control feed; and T1 (n = 19), ewes supplemented with 450 g of the feed with 25% coffee pulp. Supplementation began 14 days before estrous synchronization and ended 25 days after breeding. During estrous synchronization, progestogen (CIDR, Controlled Internal Drug Release) was inserted and left in situ for 11 days. Eighteen hours later, estrous detection began with the aid of rams. Blood samples were collected at different times of synchronization and during early pregnancy to determine antioxidant capacity, lipid oxidation and blood progesterone concentration. Pregnancy diagnosis was performed 30 and 60 days after CIDR removal. Results: supplementation with coffee pulp did not affect estrous onset, estrous response or progesterone concentration, but fertility decreased from 100 to 78.95%. The antioxidant capacity measured using the FRAP technique was greater in coffee pulp supplemented ewes only before progestogen insertion. Coffee pulp did not modify lipid oxidation; however, this variable was affected by sampling time, decreasing after progestogen removal to its lowest values at 22 days into pregnancy. Conclusion: although supplementation with coffee pulp at 25% in the concentrate increased antioxidant capacity of ewes before insertion of progestogen, it is not recommended to use this percentage during synchronization or early pregnancy since it can negatively affect gestation rate.

Resumen Antecedentes: se sabe que la pulpa de café puede modificar el estado oxidativo y la fertilidad en vacas lecheras. Objetivo: evaluar los efectos del suministro dietario de pulpa de café y su capacidad antioxidante, oxidación lipídica, y características reproductivas en ovejas durante la sincronización del estro y la gestación temprana. Métodos: cuarenta ovejas cruzadas Suffolk x Dorset de 3 y 4 partos fueron asignadas a dos grupos: T0 (n = 21), suplementación con 450 g de alimento (grupo testigo); y T1 (n = 19), suplementación con 450 g de alimento con 25% de pulpa de café. La suplementación inició 14 días antes de la sincronización del estro y terminó 25 días después del apareamiento. El progestágeno (CIDR, Dispositivo Intravaginal de Liberación Controlada) fue insertado en los animales por 11 días. Dieciocho horas después de su retiro se inició la detección de estros. Se muestreó a diferentes tiempos después de la sincronización y durante la gestación temprana para determinar capacidad antioxidante, oxidación lipídica y concentración de progesterona. El diagnóstico de preñez se realizó 30 y 60 días después de la remoción del CIDR. Resultados: la suplementación con pulpa de café no afectó el inicio del estro, la respuesta al estro ni la concentración de progesterona. Sin embargo, la fertilidad disminuyó de 100 a 78,95%. La capacidad antioxidante, medida mediante la técnica FRAP, fue mayor en ovejas suplementadas con pulpa de café, pero solo antes de la inserción del progestágeno. La pulpa de café no modificó la oxidación lipídica; sin embargo, si fue modificada por el tiempo de muestreo, decreciendo desde la remoción del progestágeno hasta los 22 días de preñez. Conclusión: aunque la suplementación del concentrado con 25% de pulpa de café incrementó la capacidad antioxidante antes de la inserción del progestágeno, no se recomienda ese porcentaje durante la sincronización y gestación temprana, ya que redujo el porcentaje de gestación de las ovejas.

Resumo Antecedentes: a polpa de café pode modificar o estado oxidativo e a fertilidade em vacas leiteiras. Objetivo: avaliar a polpa de café na capacidade antioxidante, oxidação da gordura e nas características reprodutivas das ovelhas durante sincronização do estro e gestação inicial. Métodos: quarenta ovelhas cruzas Suffolk e Dorset de 3 e 4 nascimentos foram agrupadas no T0 (n = 21), suplementação com 450 g de alimento controle e T1 (n = 19), suplementação com 450 g de alimento com 25% de polpa de café. A suplementação iniciou 14 dias antes da sincronização do estro e terminou 25 dias depois do acasalamento. O hormônio progestina (CIDR, dispositivo intravaginal de libertação controlada de fármaco) foi inserido por 11 dias. Dezoito horas depois da retirada iniciouse a detecção do estro. Fizeram-se amostras de diferentes tempos do período e da gestação inicial para determinar a capacidade antioxidante, oxidação dos lipídeos e concentração de progesterona. Realizou-se o diagnóstico de gestação 30 e 60 dias depois de remover o CIDR. Resultados: a suplementação com a polpa de café não afetou o início do estro, a resposta ao estro e a concentração de progesterona, mas a fertilidade decresceu de 100 a 78,95%. A capacidade antioxidante que foi medida pela técnica de FRAP foi maior nas ovelhas suplementadas com a polpa de café somente antes da inserção do progestágeno. A polpa de café não modificou a oxidação dos lipídeos; no entanto, estes foram modificados pelo tempo de amostra, decrescendo depois de remover o progestágeno até 22 dias de gestação. Conclusão: ainda que a polpa de café a 25% de concentração incrementa a capacidade antioxidante antes da inserção do progestágeno, não é recomendado este percentual para as ovelhas durante a sincronização do estro e a gestação inicial, já que decresce a porcentagem de gestação.