The disposition of carbenicillin in blood,other body fluids and tissues of buffalo calves (Bubalus bubalis)     

K. S. Brar  M. S. Bal 《Veterinary research communications》1993,17(2):119-122

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Maternal immunity to infectious bovine rhinotracheitis and bovine viral diarrhea viruses: duration and effect on vaccination in young calves.     

J S Brar  D W Johnson  C C Muscoplat  R E Shope  J C Meiske 《American journal of veterinary research》1978,39(2):241-244

The immune response to modified live-virus bovine viral diarrhea (BVD) vaccine and infectious bovine rhinotracheitis (IBR) vaccine was examined in calves that had received passive maternal antibodies to these viruses. Blood serum samples from vaccinated and control (nonvaccinated) calves were examined for more than 1 year to determine the rate of decline of passive anti-BVD and anti-IBR antibodies and the effect that vaccination had on these antibody titers. The control calves lost their antibodies to BVD and IBR viruses at the rate of one half their remaining antibody titer every 21 days. Calves serologically responded to BVD vaccine at a time when maternal antibody titers remained between 1:96 and 1:20. However, animals did not seroconvert to the IBR vaccine until maternal antibodies had decreased and become undetectable. Evidence is presented to show that although passive immunity will inhibit IBR vaccination, priming for a secondary response will occur so that on subsequent vaccination, at a time when maternal antibodies have disappeared, the animals will respond anamnestically to IBR vaccination.  相似文献   

The use of ultrasonography in the reproductive evaluation of boars          下载免费PDF全文

RO Pinho  BS Camilo  DMA Lima  FAC Villadiego  JCM Vergara  HH Shiomi  RE Cardoso  PS Lopes  JD Guimarães 《Reproduction in domestic animals》2018,53(2):393-400

The objective was to study the use of ultrasound as a complementary test in the breeding soundness evaluation in male pigs and study the pattern of echogenicity of the testicular parenchyma in boars of different racial groups. Twenty‐six adult boars from four different racial groups were used, 10 from the Piau breed (group 1), four from the commercial and finishing group (group 2), six Pietrain breed (group 3) and six from the Duroc breed (group 4). All animals were evaluated for breeding soundness evaluation and the ultrasound examination of the testicles. The groups of animals that were evaluated showed no difference in the main semen parameters that were evaluated, except for the sperm volume, concentration of the ejaculated sperm and the supravital staining; the lowest figures were for the animals from the Piau breed (group 1). In relation to the testicular biometrics, Duroc animals (group 4) had a greater scrotal width compared to the other groups. But when we assessed the intensity of pixels of the testicles, there was a difference between groups. The groups 2 (finishing animals), 3 (Pietrain) and 4 had no difference between themselves. Group 3 had greater pixel intensity in relation to group 1. Of the 26 animals studied, five showed an abnormality during ultrasound evaluation, like hydrocele, hyperechoic mass in the testicular parenchyma, cyst in the head of the epididymis and the presence of fluid in the head and tail of the epididymis. The various animal groups studied did not differ in the principal reproductive parameters evaluated, showing that despite the great variability of reproductive traits between breeds and within the same breed, the breeding soundness evaluation, the more complete it is, is essential for the selection of breeders and the ultrasonography of the reproductive system becomes an important addition in this examination.  相似文献   

Cryopreservation of Piau‐Breed Wild Boar Sperm: Assessment of Cooling Curves and Centrifugation Regimes          下载免费PDF全文

HH Shiomi  RO Pinho  DMA Lima  JB Siqueira  MCR Santos  EV Costa  PS Lopes  SEF Guimarães  JD Guimarães 《Reproduction in domestic animals》2015,50(4):545-553

This study aimed to assess the effects of different cooling curves and centrifugation regimes used in cryopreservation protocols on the post‐thaw viability of Piau‐breed wild boar (Sus scrofa) sperm using in vitro assessment tests. Two centrifugations (800  g for 10 min and 2400  g for 3 min) and two cooling curves (conventional cooling using nitrogen vapour – freezing 1 and automated cooling using a programmed freezing machine – freezing 2) were tested. Therefore, the treatments were divided into M3 – centrifugation at 2400  g for 3 min and freezing 2; M10 – centrifugation at 800  g for 10 min and freezing 2; R3 – centrifugation at 2400  g for 3 min and freezing 1; and R10 – centrifugation at 800  g for 10 min and freezing 1. No significant differences (p > 0.05) between treatments occurred post‐thawing regarding the total sperm motility means recorded. The mean values of the different treatments were not different from each other regarding the supravital staining (SV), hypo‐osmotic test (HO), sperm–egg binding assay or sperm morphology. This study showed that both the cooling curve and the centrifugation regime affected the quality of post‐thaw sperm, and centrifugation for shorter times and cooling curves using automated cooling are the most suitable for minimizing sperm injury.  相似文献   

An abattoir survey of equine dental abnormalities in Queensland,Australia          下载免费PDF全文

T Chinkangsadarn  GJ Wilson  RM Greer  CC Pollitt  PS Bird 《Australian veterinary journal》2015,93(6):189-194

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Energy input–output modeling and sensitivity analysis for on-farm mechanically paddy straw bales formation     

Sharma  Ankit  Brar  Amandeep Singh 《Paddy and Water Environment》2022,20(2):255-264

Paddy and Water Environment - The paddy straw was collected in the form of bales with three mechanical process CI (stubble shaver + rectangular baler), CII (stubble...  相似文献   

Inheritance of a plant type mutant and its utilization in chickpea     

J. S. Sandhu  H. S. Brar  M. M. Verma 《Euphytica》1990,48(2):111-112

Summary A macro-mutant, E 100Y(M) in chickpea (Cicer arietinum L.) was found to affect several plant and seed characters. For plant type monogenic inheritance was observed. A single pair of recessive genes pt/pt was ascribed to this mutant. The mutant locus seemed to be exerting pleiotropic action. The utilization of this mutant for chickpea improvement has been discussed.  相似文献   

Drip irrigation and nitrogen fertilization alter phenological development and yield of spring maize (Zea mays L.) under semi-arid conditions     

Harjeet Singh Brar  Krishan Kumar Vashist 《Journal of plant nutrition》2020,43(12):1757-1767

Abstract

Maize response to deficit water and nitrogen for assessing phenological development and yield was studied under semi-arid conditions. Experiment consisting three drip irrigation levels, replenish 60 (DI₆₀), 80 (DI₈₀) and 100 percent (DI₁₀₀) of cumulative pan evaporation, and four nitrogen doses 50 (RN₅₀), 75 (RN₇₅), 100 (RN₁₀₀) and 125 (RN₁₂₅) per cent of recommended nitrogen. A Furrow irrigated treatment was kept as control/check. Significant earliness in visibility of collar of 8^th leaf, tasseling, silking and significant delay in dough stage and physiological maturity was recorded under well water treatment DI₁₀₀ as compared to DI₆₀. Days to collar of 8^th leaf, tasseling and silking had significant negative correlation, and duration of yield formation phase and days to physiological maturity had significant positive correlation with grain yield. Higher DM production, longer yield formation phase and late physiological maturity led to significantly higher grain yield under DI₁₀₀. In case of nitrogen levels, phonological characteristics like collar of 8^th leaf, tasseling and silking were significantly delayed, and dough stage and physiological maturity were advanced under nitrogen deficit treatment RN₅₀ as compared to RN₁₀₀ and RN₁₂₅. Significantly higher dry matter production and longer yield formation phase observed led to significant higher SCY under RN₁₀₀ and RN₁₂₅ as compared to RN₅₀. Yield formation phase was significantly longer under drip irrigated crop as compared to control during 2^nd year of study. Crop phenological development significantly affected by drip irrigation regimes and nitrogen levels, and there was significant correlation between phenological stages development and grain yield.  相似文献   

Genetic Diversity Based on Allozyme Alleles of Chinese Cultivated Rice     

TANG Sheng-xiang  WEI Xing-hua  JIANG Yun-zhu  D S Brar  G S Khush 《中国农业科学(英文版)》2007,6(6)

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Tall and Hard Fescue Responses to Periodic Soil Water Deficits     

G. S. Brar  A. J. Palazzo 《Journal of Agronomy and Crop Science》1995,175(4):221-229

Tall (Festuca arundmacea Schreb.) and hard (Festuca ovina var. longifolia (L.) Koch) fescues are widely sown to stabilize disturbed soils in the cool–humid and transition climatic zones of the USA. Our objectives were to: a) quantify changes in the allocation of dry matter and growth of tall and hard fescue, forced to grow on stored soil water in sandy soil; and b) compare dry matter allocation over time between roots and shoots to evaluate the dynamics of root-associated drought avoidance mechanisms. A randomized complete block experiment with four replications and two factors (species and stress level) was conducted in a greenhouse. The main blocks consisted of two fescue species: tall fescue and hard fescue; sub-blocks contained stress levels: well-watered and stressed. Low, medium and severe stresses were imposed by withholding water in one set of pots. The types of fescue species grown significantly affected leaf area (LA), plant height (PH), water use (WU), root length (RL), longest root (LR), root area (RA), shoot (SDB) and root dry biomass (RDB), and root:shoot ratio (R/S). Stress level affected PH, WU, LR and RL at low stress; WU, LR and RA at medium stress; LA, PH, SDB, WU, RL, LR, RA and R/S at severe stress. Tall fescue had greater LA, PH, WU, RA, RL, LR, SDB, RDB and R/S than hard fescue under all treatments. Stress reduced LA, PH, SDB, WU, RA, RL, LR and R/S. Significant correlations were obtained for LA with RL, WU, LR, PH. RA, SDB, RDB; RL with WU, LR, PH. RA, SDB. RDB; WU with LR, PH, RA, SDB, RDB; LR with PH. RA, SDB, RDB; PH with RA, SDB, RDB; RA with SDB, RDB; and SDB with RDB. In conclusion, hard fescue had a shallower root system, shorter plant canopy, slower growth, and transpired less water to make it more drought tolerant. Tall fescue, with a deeper root system, longer plant canopy, faster growth, and greater water transpiration, is less drought tolerant at medium and severe stresses. Root attributes strongly correlated with shoot attributes and can be considered for breeding programs promoting drought tolerance.  相似文献