Strain Crosses Within and Between Lines of Turkeys Selected for High and Low Blood Pressure

Shoffner, Robert N.; Krista, L. M.; Waibel, P. E.; Quarfoth, G.

doi:10.3382/ps.0500342

Cited by 10 publications

(8 citation statements)

References 5 publications

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“…The overall evidence provided by this study and those of the Rutgers group is that the chicken has a blood pressure and survival relationship opposite in sign to that generally observed for other species which includes at least one other avian species, the turkey, according to the recent report of Shoffner et al (1971). The anomalous situation in the chicken is complicated by the observed genotype x survival interaction.…”

Section: Discussioncontrasting

confidence: 42%

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Blood Pressure and Its Genetic Variation and Co-Variation with Certain Economic Traits in Egg Type Chickens

Hollands¹,

Merritt²

1973

Poultry Science

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Indirect systolic blood pressures were measured on females of three egg type strains of chickens over five consecutive generations. The measurements were taken between 165-175 days of age. Blood pressure measurements were also taken in one generation on breeder males at 380 days of age. Two of the strains were under selection for egg production traits while the third strain was a control derived from the same genetic base as one of the selected strains. Mean blood pressures were 148 mm. Hg for females and 203 mm. Hg for males. Heritability estimates for females averaged 0.26. Additive type of genetic expression of blood pressure was indicated. Mean blood pressure of birds dying (to 500 days of age) was significantly lower in the control and related selected strain than the mean blood pressure of survivors. In the other selected strain there was no relationship between blood pressure and mortality. A significant interaction was observed between strains and sexes. Genetic and phenotypic correlations with production and egg quality traits were for the most part of a low order of magnitude and relatively few of them statistically significant. The sign of the genetic correlation was positive for body weights and most egg quality traits but negative for egg production and age to first egg.

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Section: Discussioncontrasting

confidence: 42%

“…Reciprocal crosses between the Contribution No. 482,Animal Research Institute. high and low lines showed only additive inheritance (Shoffner et al, 1971).…”

Section: Introduction G Enetic Variation In Blood Pressure Hasmentioning

confidence: 99%

Blood Pressure and Its Genetic Variation and Co-Variation with Certain Economic Traits in Egg Type Chickens

Hollands¹,

Merritt²

1973

Poultry Science

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“…The interrelationship of such conditions as atherosclerosis, catecholamines, aldosterone and angiotensin, renin activity, and/or the genetic constitution of the host make it difficult to determine the actual cause of the sustained blood pressure increase. Krista et al (1970) and Shoffner et al (1971) report on the development of genetically hypertensive and hypotensive strains of turkeys. According to Shoffner et al (1971), the genetic variance for high blood pressure in turkeys is additive.…”

Section: Introductionmentioning

confidence: 98%

Plasma Renin Activity in Hypertensive and Hypotensive Turkeys

Krista

McDANIEL

1978

Poultry Science

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Plasma renin activity (PRA) and Angiotensin I values were determined in hypertensive and hypotensive strains of turkeys. In this study, PRA and/or Angiotensin I values were not influenced by body weight or blood pressure. The PRA of the hypertensive turkeys (.227 ng/ml/hr) was not significantly different from the hypotensive turkeys (.216 ng/ml/hr). Also, the Angiotensin I values of .225 and .213 ng/ml in the hypertensive and hypotensive lines, respectively, were not different. There were no significant correlations between body weight, blood pressure, PRA, and/or Angiotensin I.

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“…The finding of 'normal' blood pressure in animals of the same strain, but brought up in a free environment and fed ad libitum, suggests that such factors as forced diet, obesity, fast growth rate and crowding may be relevant to the development of hypertension in this species. These results do not exclude the influence of genetic factors (Shoffner, Krista, Waibel & Quarfoth, 1971) on hypertension, but suggest that environmental factors are very important for its development. These factors are all capable of inducing an 'alarm reaction' which determines an increased release of corticosterone, the principal adrenocortical hormone in this species (Brown,196 l), and of adrenaline (ElHalawani et al, 1973), with a consequent rise in blood pressure.…”

Section: Discussionmentioning

confidence: 60%

The Natural History of Hypertension in Turkeys

et al. 1978

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1. Variables involved in the genesis of hypertension in male broad-breasted white turkeys include social environment, obesity and high salt intake.2. The hypertension is characterized by low plasma renin activity and, with increasing age, normal to high plasma aldosterone.3. Medionecrosis of the abdominal aorta is a common pathological finding.4. The absence of atherosclerotic plaques is probably related to the high concentrations of alpha-lipoproteins.

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Strain Crosses Within and Between Lines of Turkeys Selected for High and Low Blood Pressure

Cited by 10 publications

References 5 publications

Blood Pressure and Its Genetic Variation and Co-Variation with Certain Economic Traits in Egg Type Chickens

Blood Pressure and Its Genetic Variation and Co-Variation with Certain Economic Traits in Egg Type Chickens

Plasma Renin Activity in Hypertensive and Hypotensive Turkeys

The Natural History of Hypertension in Turkeys

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