The objective of this study was to determine if a diet supplemented simultaneously with vitamins C and E would alleviate the negative effects heat stress, applied between 28 42 days age, on performance, carcass meat quality traits broiler chickens. A total 384 male chickens were assigned completely randomized design, 2×3 factorial arrangement (diet or without vitamin supplementation two ambient temperatures plus pair-feeding group) 16 replicates. Chickens kept in thermoneutral conditions up...

Summary With the objective of mapping quantitative trait loci (QTLs) for performance and carcass traits, an F 2 chicken population was developed by crossing broiler layer lines. A total 2063 chicks in 21 full‐sib families were reared as broilers slaughtered at 42 days age. Seventeen traits measured. Parental (F 0 ) 1 individuals genotyped with 80 microsatellites from chromosome to select informative markers. Thirty‐three markers used selective genotyping extreme phenotypes body weight age...

Rabbits are very sensitive to heat stress because they have difficulty eliminating excess body heat. The objective of the current study was evaluate effects on slaughter weight, dressing percentage and carcass meat quality traits rabbits from two genetic groups. Ninety-six weaned were used: half Botucatu group crossbreds between New Zealand White sires does. They assigned a completely randomized design in 2 × 3 factorial arrangement (two groups three ambient temperatures: 18°C, 25°C 30°C)...

An F(2) resource population, derived from a broiler x layer cross, was used to map quantitative trait loci (QTL) for body weights at days 1, 35 and 41, weight gain, feed intake, efficiency 41 intestinal length. Up 577 chickens were genotyped with 103 genetic markers covering 21 linkage groups. A preliminary QTL mapping report using this same population focused exclusively on GGA1. Regression methods applied line-cross half-sib models interval mapping. Under the model, eight detected (GGA2, 3...

Female sea turtles have rarely been observed foraging during the nesting season. This suggests that prior to their migration beaches females must store sufficient energy and nutrients at grounds be physiologically capable of undergoing months without feeding. Leptin (an appetite-suppressing protein) ghrelin (a hunger-stimulating peptide) affect body weight by influencing intake in all vertebrates. We investigated levels these hormones other physiological nutritional parameters hawksbill Rio...

Abstract Excessive fat deposition is a negative factor for poultry production because it reduces feed efficiency, increases the cost of meat and health concern consumers. We genotyped 497 birds from Brazilian F 2 Chicken Resource Population, using high-density SNP array (600 K), to estimate genomic heritability related traits identify regions positional candidate genes (PCGs) associated with these traits. Selection signature regions, haplotype blocks data previous whole genome sequencing...

An F(2) population established by crossing a broiler male line and layer was used to map quantitative trait loci (QTL) affecting abdominal fat weight, percentage serum cholesterol triglyceride concentrations. Two genetic models, the line-cross half-sib, were applied in QTL analysis, both using regression interval method. Three significant four suggestive mapped analysis half-sib analysis. A total of five for six concentration analyses. New associated with on GGA5, GGA23 GG27. between markers...

Excess fat content in chickens has a negative impact on poultry production. The discovery of QTL associated with deposition the carcass allows identification positional candidate genes (PCGs) that might regulate and be useful for selection against excess chicken's carcass. This study aimed to estimate genomic heritability coefficients identify QTLs PCGs abdominal (ABF) skin (SKIN) traits broiler chicken population, originated from White Plymouth Rock Cornish breeds. ABF SKIN are moderately...

The objective of this study was to evaluate the effects interaction between genetic group (Botucatu or crossbred) and ambient temperature (thermoneutral, moderate intense heat stress) on physiological indicators performance growing rabbits. Ninety-six weaned rabbits were used, half from Botucatu crossbreds (New Zealand White males × females). They assigned a completely randomized design in 2 3 factorial arrangement (two groups three temperatures) with repeated measures (weeks). Colonic...

Meat quality is an important feature for the poultry industry and associated with consumer satisfaction.The calpain 1 (CAPN1) gene related to tenderness process of meat postmortem, 3 (CAPN3) plays role in ©FUNPEC-RP www.funpecrp.com.brGenetics Molecular Research 12 (1): 472-482 (2013) Associations CAPN1 CAPN3 polymorphisms chickens myofibrillar organization growth.The objective present study was identify these genes determine association between traits economic interest poultry.Eleven...

We conducted a two-way selection experiment in composite rabbit population to investigate the responses for postweaning ADG and feed conversion (FC). Two generations of crossing, followed by four random pair matings, preceded three selection. Selection was practiced within lines: high-feed (HFC), low-feed (LFC), high gain (HG), low (LG). Data on 1,446 rabbits from mating were fitted an animal model estimate heritabilities genetic correlation between FC. The two-trait included common litter...

O efeito da temperatura e o do enriquecimento piso de gaiola sobre bem-estar coelhos em crescimento foram avaliados. Quarenta oito grupo genético Botucatu, desmamados aos 35 dias idade, alojados Câmara Climática, quatro por (1,00 x 0,60 0,40m), 12 gaiolas que tinham (ou não) metade coberto com cama palha. As instaladas sala ambiente resfriada. Os animais tiveram livre acesso à ração balanceada água nos dois tipos piso. Para se avaliar bem-estar, realizadas cinco observações 24 horas cada,...

An F2 experimental population, developed from a broiler layer cross, was used in genome scan of QTL for percentage carcass, carcass parts, shank and head. Up to 649 chickens four paternal half-sib families were genotyped with 128 genetic markers covering 22 linkage groups. Total map length 2630 cM, approximately 63% the genome. interval mapping using regression methods applied line-cross models. Under model, 12 genome-wide significant 17 suggestive linkages percentages head mapped 13 groups...

Chicken experimental populations have been developed worldwide for QTL mapping, but their genotypic characterizations are not usually discussed. The objective of this study was to characterize genotypically two F1 reciprocal generations and parental lines based on the estimation parameters. These originated Brazilian reference map QTL. evaluated parameters were polymorphic information content (PIC), observed expected heterozygosities number alleles at microsatellite loci chromosomes 1, 3 4....

The effect of ascorbic acid on glucose-induced insulin release from single pancreatic islets was measured using a new, ultra-sensitive enzyme-linked immunosorbent assay. Within 20 s inhibited secretion; inhibition dose dependent and completely reversible. There 50% the secretory response with 200 microM 90% 400 acid. decrease in secretion recorded as reduction amplitudes fast transients, which give rise to oscillatory nature secretion. by associated hyperpolarization beta-cell. Suppression...

Summary Major objectives of the poultry industry are to increase meat production and reduce carcass fatness, mainly abdominal fat. Information on growth performance composition important for selection leaner chickens. To enhance our understanding genetic architecture underlying chemical chicken carcasses, an F 2 population developed from a broiler × layer cross was used map quantitative trait loci (QTL) affecting protein, fat, water ash contents in carcasses. Two models were applied QTL...

The aim of the present study was to determine impact malnutrition during early postnatal life and feeding pattern rat offspring when adults (2 months 1 year old). In comparison with rats normally fed lactation, we observed that adult displayed a faster process reduction protein-free diet offered. addition, studied concentration insulin leptin in lactating pups (10 days) these became after onset new induced by diet. When changed at 60 days, malnourished lactation displayed, 3 food intake...

The objective was to evaluate the effects of genetic group and age on growth, carcass, meattraits rabbits. A total 144 straightbred Botucatu White German Giant × crossbred rabbitswere involved. Rabbits were weaned at 35 d sequentially slaughtered, four per sexcombination, at: 42, 49, 56, 63, 70, 77, 84 91 d. 2×2 factorial arrangement employed in a completelyrandomized design with repeated measures for growth traits, split-plot carcass meat traits.Crossbred rabbits heavier (2032 vs. 1962 g;...

Short stature, a marker for undernutrition early in life, has been associated with obesity Brazilian women, but not men. We tested the hypothesis that weight gain during reproductive years could explain this gender difference. A national two-stage household survey of mothers one or more children under five age was conducted Brazil 1996. The subjects were women aged 20 to 45 (N = 2297), last delivery seven months prior interview. regions country divided into rural, North/Northeast (urban...