Reduction in susceptibility to Xanthomonas axonopodis pv. citri in transgenic Citrus sinensis expressing the rice Xa21 gene     

B. M. J. Mendes  S. C. Cardoso  R. L. Boscariol-Camargo  R. B. Cruz  F. A. A. Mourão Filho  A. Bergamin Filho 《Plant pathology》2010,59(1):68-75

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Genotype × environment interaction for long-yearling weight in Canchim cattle quantified by reaction norm analysis     

Mattar M  Silva LO  Alencar MM  Cardoso FF 《Journal of animal science》2011,89(8):2349-2355

The objective of this study was to investigate the presence of genotype × environment interactions (G×E) for long-yearling weight in Canchim cattle (5/8 Charolais + 3/8 zebu) in Brazil using reaction norms (RN). The hierarchical RN model included the fixed effect of age of the animal (linear coefficient) and random effects of contemporary groups and additive animal genetic intercept and slope of the RN and contemporary group effects as random effects. Contemporary groups as the most elemental representation of management conditions in beef cattle were chosen to represent the environmental covariate of the RN. The deviance information criteria demonstrated that a homoskedastic residual RN model provided a better data fit compared with a heteroskedastic counterpart and with a traditional animal model, which had the worst fit. The environmental gradient for long-yearling weight based on contemporary group effects ranged from -105 to 150 kg. The additive direct variance and heritability estimates increased with increasing environmental gradient from 74.33 ± 22.32 to 1,922.59 ± 258.99 kg(2) and from 0.08 ± 0.02 to 0.68 ± 0.03, respectively. The high genetic correlation (0.90 ± 0.03) between the intercept and the slope of the RN shows that animals with the greatest breeding values best responded to environmental improvement, characterizing scale effect as the source of G×E for long-yearling weight. The phenotypic plasticity demonstrated by the slope of the RN of the animal indicates the possibility to change genotype expression along the environmental gradient through selection. The results demonstrate the importance of accounting for G×E in the genetic evaluation of this population.  相似文献   

Fatty acid profile of hair lambs and their crossbreds slaughtered at different weights     

Landim AV  Cardoso MT  Castanheira M  Fioravanti MC  Louvandini H  McManus C 《Tropical animal health and production》2011,43(8):1561-1566

This study aims to investigate the effect of breed and slaughter weight on fatty the acid profile of the Longissimus dorsi muscle in lambs. Twenty-four Santa Inês (SI), 24.5 Ile de France × 0.5 Santa Inês (Ile × SI) and 12.5 Texel × 0.5 Santa Inês (Te × SI), slaughtered at different weights (30, 35, 40, and 45 kg), were evaluated. The animals were reared with creep feeding to weaning and were feedlot finished, receiving a diet composed of 30% hay and 70% concentrate. The analyses of fatty acids were carried out on the Longissimus muscle of the 13th rib. The experiment was in a three by four factorial design. The total mean saturated fatty acid level was 44.88%, with 43.30% monounsaturated fats and 1.72% polyunsaturated. The major fatty acids found included oleic (43%), palmitic (22%), and stearic (18%). The concentration of desirable fatty acids varied from 61.56% to 66.78%, with Te × SI (66.78%) having the highest levels (P < 0.05). The slaughter weight affected (P < 0.05) the saturated and unsaturated (both mono and poly) fatty acid profiles. The 35-kg slaughter weight showed the most desirable fatty acid profile. The saturated myristic and stearic fatty acids decreased with an increase in the slaughter weight, but oleic acid increased. In the conditions of the present study, the meat from Santa Ines and Texel × Santa Ines lambs had fatty acid profiles more beneficial for human health due to the higher levels of unsaturated fatty acids.  相似文献   

A modified agglutination test for the diagnosis of Besnoitia besnoiti infection     

Waap H  Cardoso R  Marcelino E  Malta J  Cortes H  Leitão A 《Veterinary parasitology》2011,178(3-4):217-222

Bovine besnoitiosis is caused by Besnoitia besnoiti, an obligate intracellular apicomplexan parasite. Affected animals present cutaneous and systemic manifestations and the disease may lead to considerable economic losses. Although generally associated to tropical and subtropical areas, bovine besnoitiosis is now considered an emergent disease in Europe, due to the increasing number of new cases and apparent geographical expansion. In this study we evaluated the performance of a modified agglutination test (B-MAT) in the serodiagnosis of bovine besnoitiosis in comparison to the indirect immunofluorescent-antibody test (IFAT). To establish optimal protocol conditions we used bovine sera with a known infection status for B. besnoiti infection. Positive animals (n=36) presented B. besnoiti dermal cysts and anti-B. besnoiti specific antibodies, as determined by the indirect immunofluorescence test (IFAT). Negative animals (n=103) were from non-endemic areas in Portugal and negative by the IFAT. From here, we evaluated the sensitivity and specificity of the B-MAT relative to the IFAT with a panel of sera from herds with history of bovine besnoitiosis in Portugal, Spain and France (n=402), using three serum dilutions (1:80, 1:160, 1:320). Considering the positive cut-off at 1:160 serum dilution, the B-MAT showed an almost perfect test agreement with the IFAT; (κ=0.968; 95% CI: 0.941-0.996) with a relative sensitivity of 97.2% (95% CI: 94.1-100%) and a relative specificity of 99.3% (95% CI: 98.4-100%). As a simple and inexpensive technique the B-MAT represents a valuable tool for the diagnosis and study of the epidemiology of bovine besnoitiosis.  相似文献   

Breeding objectives of Brangus cattle in Brazil     

Michele R. S. Simões  Joal J. B. Leal  Alessandro P. Minho  Cláudia C. Gomes  Michael D. MacNeil  Rodrigo F. Costa  Vinícius S. Junqueira  Patrícia I. Schmidt  Fernando F. Cardoso  Arione A. Boligon  Marcos J. Yokoo 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》2020,137(2):177-188

Our goal was to define a breeding objective for Brangus beef cattle in Brazil. Bioeconomic models were produced and used to estimate economic values (EVs). The scenarios simulated were typical full-cycle beef production systems that are used in tropical and subtropical regions. The breeding objective contained pregnancy rate (PR), warm carcass weight (WCW), mature cow weight (MCW), number of nematode eggs per gram of faeces (EPG) and tick count (TICK). Two models were used in series to estimate the EV. A deterministic model was used to simulate effects of PR, WCW and MCW on profitability with a constant parasite load. Subsequently, stochastic models were used to estimate economic values for TICK and EPG as consequences of their environmental effects on weight gains, mortality and health costs. The EV of PR, WCW, MCW, EPG and TICK, was US$1.59, US$2.11, −US$0.24, −US$5.35 and −US$20.88, respectively. Results indicate positive emphasis should be placed on PR (12.49%) and WCW (65.07%) with negative emphasis on MCW (13.92%), EPG (2.77%) and TICK (5.75%). In comparison with the indexes usually used, these results suggest a reformulation in the selection indexes of the beef production system in tropical and subtropical regions in order to obtain greater profitability.  相似文献   

Histological effects on the kidney,spleen, and liver of Nile tilapia Oreochromis niloticus fed different concentrations of probiotic Lactobacillus plantarum     

Ruiz  Maria Luiza  Owatari  Marco Shizuo  Yamashita  Marcela Maya  Ferrarezi  José Victor Saffadi  Garcia  Patricia  Cardoso  Lucas  Martins  Maurício Laterça  Mouriño  José Luiz Pedreira 《Tropical animal health and production》2020,52(1):167-176

Tropical Animal Health and Production - The aims of this study were to evaluate the inclusion of different concentrations of Lactobacillus plantarum in Nile tilapia diet and to verify histological...  相似文献   

新疆甜菜高产高效益优化农艺措施     

聂文魁  王燕飞  杨洪泽  刘华君  刘军  高卫时  张立明  热西提 《中国糖料》2002,(4):18-20

采用3因素5水平二次通用旋转回归试验设计方法,选取密度、种肥量、追肥量3项对甜菜高产、高效益起关键作用的农艺措施进行量化分析,提出直播方式下的高产、高效益模型,获得了60t/hm2以上和净收益7000元/hm2以上的优化农艺措施组合方案为:密度8.42～8.34万株/hm2,种肥222～248.4kg/hm2,追肥383～408.6kg/hm2。  相似文献   

Prevalence of subclinical infectious agents in a blood donor population tested on every donation     

B. Correia  A. Magalhães  L. Rocha  I. Cardoso  R. R. F. Ferreira  I. Mesa-Sanchez 《The Journal of small animal practice》2024,65(3):176-180

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Effect of water hyacinth (Eichhornia crassipes) hay inclusion in the diets of sheep     

Gustavo Araújo de Vasconcelos  Robson Magno Liberal Véras  Janaina de Lima Silva  Daniel Barros Cardoso  Pierre de Castro Soares  Nadja Nara Gomes de Morais  Andresa Cristina Souza 《Tropical animal health and production》2016,48(3):539-544

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Genetic diversity via REML-BLUP of ex situ conserved macauba [Acrocomia aculeata (Jacq.) Lodd. ex Mart.] ecotypes     

de Sá  Silvia Ferreira  dos Santos  Luísa C. Aragão  da Conceição  Léo D. H. C. Schwartzhaupt  Braga  Marcelo Fideles  Laviola  Bruno Galvêas  Cardoso  Alexandre Nunes  Sayd  Ricardo Meneses  Junqueira  Nilton T. Vilela 《Genetic Resources and Crop Evolution》2021,68(8):3193-3204

Genetic Resources and Crop Evolution - Macauba [Acrocomia aculeata (Jacq.) Lodd. ex Mart.], a palm tree native to Brazil, has a high potential as an alternative source for vegetal oil production....  相似文献