Thyroid hormones and antibody response  to sheep erythrocytes of dwarf and normal chickens  selected for juvenile body weight

MARTIN, A.; McNABB, F. M.A.; SIEGEL, P. B.

doi:10.1051/gse:19880409

Cited by 8 publications

(11 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There were differences among stocb with means being 1-71 C , 3-31 a \ 3-98 a and 2-59 b for populations HH, LH, HL and LL, respectively (values with same letter are not different at P> 0-05). The greater antibody responses for LL than HH chicks were consistent with those reported by Martin et al (1988) and Miller et al (1992). The 'overdominance' noted in comparisons of the parental lines and the Fi crosses may reflect a general increase in fitness by the crosses, which was also reflected in the heterosis for food efficiency.…”

Section: Immuno Comp Etenc Esupporting

confidence: 83%

Growth related traits in body weight selected lines and their crosses reared under different nutritional regimens

Liu

Dunnington²,

Siegel³

1995

British Poultry Science

Self Cite

View full text Add to dashboard Cite

1. Four populations--two that had undergone 37 generations of selection for high (HH) and low (LL) body weight, and reciprocal crosses between them (HL and LH) were fed two diets differing in protein and energy. Diet A, under which selection had been made, contained 200 g protein and 11.23 MJ/kg. Diet E contained 240 g protein and 13.16 MJ/kg. 2. Body weight and feed efficiency were measured weekly from hatch to 56 d of age at which time oesophagus, abdominal fat pad, heart, liver and lungs were removed and weighed. At 35 d of age chicks were inoculated with sheep erythrocytes (SRBC) and antibody titre was measured 6 d later. 3. Chicks fed diet E were heavier than those fed diet A. HH chicks were heavier than LL chicks with HL and LH chicks intermediate to the parental lines. LH chicks were heavier than HL ones reflecting large maternal effects. 4. Food efficiencies among stocks and diets were consistent with those for body weight, with HH > LH > HL > LL and E > A. Relative differences between diets were similar across ages and heterosis for food efficiency was about 15%. 5. Relative to body weight, oesophagus and liver weights were heavier in chickens fed diet A than fed diet E. The pattern reversed for abdominal fat pad. 6. Antibody to SRBC antigen was greater in the crosses than in line HH and in cross HL than line LL, with heterosis of 70%.

show abstract

Section: Immuno Comp Etenc Esupporting

confidence: 83%

Growth related traits in body weight selected lines and their crosses reared under different nutritional regimens

Liu

Dunnington²,

Siegel³

1995

British Poultry Science

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, attempts to verify this in different lines of chickens found no relationship between thyroid hormones and antibody responses (Martin et al, 1988).…”

Section: Development and Maintenance Of Photorefractorinessmentioning

confidence: 95%

The Hypothalamic-Pituitary-Thyroid (HPT) Axis in Birds and Its Role in Bird Development and Reproduction

McNabb

2007

Critical Reviews in Toxicology

189

163

View full text Add to dashboard Cite

This article reviews thyroid function and its hypothalamic-pituitary-thyroid (HPT) axis control in birds with emphasis on the similarities and differences in thyroid function compared to mammals and other vertebrate classes. Thyroid hormones are important in metabolism and the thermogenesis required for homeothermy in birds, as in mammals, the other homeothermic class of vertebrates. Thyroid hormones play important roles in development and growth in birds, as is the case for all vertebrate classes. The developmental effects of thyroid hormones in birds are presented in the context of differences in precocial and altricial patterns of development and growth with emphasis on oviparous development. The sections on thyroid hormone actions include discussion of effects on the development of a number of tissue types as well as on seasonal organismal processes and interactions of the thyroid axis with reproduction. The current picture of how environmental chemicals may disrupt avian thyroid function is relatively limited and is presented in the context of the assessment endpoints that have been used to date. These endpoints are categorized as thyroid and HPT axis endpoints versus target organ endpoints. The final section discusses two recommended assay protocols, the avian two-generation toxicity assay and the avian one-generation assay, and whether these protocols can evaluate thyroid disruption in birds.

show abstract

“…Line x dwarf genotype interactions observed for egg traits were common and provide evidence of the incongruence of dw in different genotypic backgrounds. Line x dwarf genotype interactions have been reported for other traits in these populations (Reddy and Siegel, 1977;Martin et al, 1988) and in other populations (Merat, 1982;Lilburn et al, 1986). Modifications in egg composition due to dw may have an influence on hatchability and survivability; i.e., reductions in dry albumen and yolk lead to intermediate albumeniyolk ratios consistent with increased fitness of F\ crosses from these lines (Anthony et al, 1989).…”

Section: Resultsmentioning

confidence: 91%

“…The dw allele seems to have a stabilizing effect on synchrony of ovulation in chickens known to overproduce follicles (Jaap, 1971;Abplanalp, 1984;Brody et al, 1984;Siegel and Dunnington, 1985;Zelenka and Siegel, 1987). Evidence, however, indicates that phenotypic effects of dw on various traits may be influenced by genetic background (Reddy and Siegel, 1977;Merat, 1982;Lilburn et al, 1986;Zelenka and Siegel, 1987;Martin et al, 1988), resulting in a dwarf genotype x genetic background interaction. Comparisons between egg components of dwarf and nondwarf chickens are generally lacking.…”

Section: Introductionmentioning

confidence: 91%

Composition of Eggs from Dwarf and Normal Chickens in Lines Selected for 56-Day Body Weight

1989

View full text Add to dashboard Cite

Egg weight and egg components were measured at two ages in random samples of 30 nondwarf and 30 dwarf chickens from lines selected for high and low body weight at 56 days of age. Egg, dry shell, dry albumen, total moisture, relative moisture, and dry albumen weights as well as albumen and yolk percentage dry matter were similar at 300 and 360 days of age. Absolute and relative dry yolk weights increased with age, whereas relative shell weight and wet and dry albumen to yolk (A:Y) ratios decreased.Pullets from the high weight line laid larger eggs with more dry yolk, but less relative dry yolk and shell dry matter than those from the low weight line. Nondwarf pullets produced larger eggs with more absolute and relative dry yolk and shell dry matter than dwarf pullets. Line x genotype interactions were present for egg traits other than absolute and relative dry yolk and shell dry matter, providing evidence of differential effects of the dwarfing allele in different genotypic backgrounds. (

show abstract

Thyroid hormones and antibody response to sheep erythrocytes of dwarf and normal chickens selected for juvenile body weight

Abstract: SummaryExperiments were conducted in lines of chickens selected for high (HW)

Cited by 8 publications

References 10 publications

Growth related traits in body weight selected lines and their crosses reared under different nutritional regimens

Growth related traits in body weight selected lines and their crosses reared under different nutritional regimens

The Hypothalamic-Pituitary-Thyroid (HPT) Axis in Birds and Its Role in Bird Development and Reproduction

Composition of Eggs from Dwarf and Normal Chickens in Lines Selected for 56-Day Body Weight

Contact Info

Product

Resources

About