A comparison of purebred and strain-cross New Hampshire hens as dams

1986 ◽  
Vol 26 (3) ◽  
pp. 291
Author(s):  
RW Polkinghorne
Keyword(s):  
New Hampshire ◽  
Reciprocal Effects ◽  
White Leghorn ◽  
Reciprocal Crosses

Two purebred New Hampshire strains and their reciprocal crosses were investigated as dams when mated to White Leghorn sires. Considerable heterosis was found in the strain-cross New Hampshire hens for the production characters measured, and no important reciprocal effects were detected. As no disadvantages were detected in the performance of progeny, it was concluded that appropriately chosen strain-cross hens can be used as a means of increasing the productivity of breeder dams.

scholarly journals Development of the Testes and Combs of White Leghorn and New Hampshire Cockerels

1942 ◽  
Vol 21 (1) ◽  
pp. 35-44 ◽  
Author(s):  
Jesse E. Parker ◽  
Fred F. McKenzie ◽  
H.L. Kempster
Keyword(s):  
New Hampshire ◽  
White Leghorn

scholarly journals A production trial with layers of four hybrids under different environmental conditions in the Eastern Province of Saudi Arabia.

1971 ◽  
Vol 19 (4) ◽  
pp. 204-210
Author(s):  
H. Appelman ◽  
B.J. Bonhof
Keyword(s):  
Saudi Arabia ◽  
Rhode Island ◽  
New Hampshire ◽  
Egg Production ◽  
Live Weight ◽  
Egg Mass ◽  
White Leghorn ◽  
Eastern Province ◽  
Egg Weight ◽  
Food Consumed

161 Australorp X Rhode Island Red (RIR) X New Hampshire (NH) and 166 White Leghorn (WL) imported fowls were kept in insulated housing; 161 Australorp X RIR X NH, 166 WL, 154 RIR X WL and 148 RIR X NH X RIR fowls were kept in open houses. In the 6 groups resp., live weight at 126 days of age averaged 1602, 1227, 1578, 1234, 1397 and 1539 g, food consumption 4.02, 4.49, 4.03, 4.47, 4.25 and 4.17 kg/kg gain, overall laying percentage 56.6, 56.4, 52.5, 53.4, 55.0 and 37.5, egg production/hen 202, 201, 188, 191, 196 and 134, and egg weight 56.3, 56.3, 55.0, 55.8, 55.0 and 57.5 g. Egg mass averaged 1335, 1323, 1191, 1151, 1126 and 796 kg and food consumed/kg eggs produced 3.68, 3.53, 3.71, 3.25, 3.37 and 4.74 kg. Live weight at 16 mth of age averaged 2894, 2040, 2665, 1874, 2132 and 2517 g, and mortality 12.8, 11.1, 33.6, 43.5, 52.8 and 50.4%. (Abstract retrieved from CAB Abstracts by CABI’s permission)

Thyroid hormone effects on chick scale morphogenesis and keratinization

Development ◽  
1970 ◽  
Vol 24 (1) ◽  
pp. 65-71
Author(s):  
Nancy K. Lawrenz ◽  
Leland G. Johnson
Keyword(s):  
Thyroid Hormone ◽  
Scale Development ◽  
New Hampshire ◽  
Chick Embryos ◽  
White Leghorn ◽  
Endocrine Effects ◽  
Hormone Effects ◽  
Hormone Responsiveness

The effects of thiourea injection on scale development were studied in New Hampshire Red × White Leghorn Cross chick embryos. Normal morphogenesis and keratinization of scales were significantly delayed in thioureatreated specimens. Subsequent thyroxine injection resulted in normal or even precocious scale development. The thyroid hormone responsiveness of scale development is discussed in relation to other studies of endocrine effects on differentiation of skin and skin derivatives.

scholarly journals A failure to induce heritable changes in four generations of the White Leghorn chicken by inter- and intra-specific blood transfusion

1963 ◽  
Vol 4 (2) ◽  
pp. 221-239 ◽  
Author(s):  
I. L. Kosin ◽  
Masaru Kato
Keyword(s):  
Body Weight ◽  
New Hampshire ◽  
Blood Donors ◽  
Blood Transfusions ◽  
Plumage Colour ◽  
White Leghorn ◽  
Egg Weight ◽  
Injection Period ◽  
White Leghorn Chicken ◽  
Egg Shell

1. A three-year study was conducted to test the efficacy of inter- and intra-specific blood transfusions in domestic poultry for inducing heritable changes in the recipients. The latter were pure-bred White Leghorns. Pure-bred Broad Breasted Bronze turkeys and New Hampshire chickens served as blood donors to two distinct lines of recipients. All injections started when the recipient chicks were 2–5 days old. Altogether, more than 3000 chicks from blood injected lines were involved in the study, conducted between 1959 and 1961 and distributed between the parental and three subsequent generations. Each injected chick received a total of some 155 ml. of whole blood in the course of a five-month injection period. An adequate number of control (non-injected) birds was used throughout. Observations were made on plumage colour, body-weight, egg-weight, egg-shell colour, fertility and hatchability. Furthermore, blood plasma and muscle tissue of appropriate birds were subjected to immunological, chromatographic and electrophoretic analyses.2. On the basis of all these criteria, no evidence of heritable shifts in the direction of the donor organism was discerned among birds belonging to either of the two treated lines.

scholarly journals Riboflavin in eggs from hens of different breeds raised in Puerto Rico

1969 ◽  
Vol 34 (4) ◽  
pp. 322-326
Author(s):  
Conrado F. Asenjo
Keyword(s):  
Puerto Rico ◽  
New Hampshire ◽  
White Leghorn

The riboflavin content of eggs from New Hampshire, White Leghorn and native hens, raised in Puerto Rico, was found to be 5.18 ug., 4.70 ug., and 3.89 ug. per g. of whole fresh egg, respectively. The hens all received a mash containing an average of 2.63 ug. of riboflavin per g.

Methionine supplements in chicken diets. IV. The effect of DL-Methionine supplementation over full and part of growing period on growth and efficiency of cockerels from the reciprocal crosses of White Leghorns and Australorps

1958 ◽  
Vol 9 (5) ◽  
pp. 708 ◽  
Author(s):  
MW McDonald
Keyword(s):  
Feed Efficiency ◽  
Maximum Dose ◽  
High Energy ◽  
Low Energy ◽  
White Leghorn ◽  
Reciprocal Crosses ◽  
Growing Period ◽  
Methionine Supplementation ◽  
Wheat Products ◽  
Low Energy Diet

The commercial value of DL-methionine supplementation of diets based on wheat products and meatmeal has been investigated. The effects of 0.025, 0.05, and 0.20 per cent. methionine on growth and feed efficiency were studied on White Leghorn chickens up to 6 weeks of age. It was concluded that maximum dose response occurred between 0.05 and 0.20 per cent. supplement. Under simulated commercial conditions, comparisons were made between WL x AO and AO x WL cockerels fed high and low energy diets unsupplemented or supplemented with 0.1 per cent. methionine to 8 weeks of age, or 0.1 per cent. methionine to 12 weeks of age. Neither methionine supplement produced a significant improvement in body weight when the low energy diet was fed. Both methionine supplements produced significant improvements in weight when the high energy diet was fed. In both diets methionine continuously produced highly significant improvements in feed efficiency, while methionine only to 8 weeks produced a significant improvement in efficiency only in the high energy diet. There was no difference between reciprocal crosses in weight or feed efficiency.

Divergent Effects of Excess Dietary Vitamin A on Alimentary Cholesterolemia in Cockerels of Different Genetic Backgrounds

1975 ◽  
Vol 53 (2) ◽  
pp. 256-263
Author(s):  
Bill Woodward ◽  
B. E. March
Keyword(s):  
Vitamin A ◽  
Oral Dose ◽  
Single Oral Dose ◽  
New Hampshire ◽  
Dietary Cholesterol ◽  
The Other ◽  
Dietary Vitamin ◽  
White Leghorn ◽  
Variable Effect ◽  
Large Load

The variable effect of excessive vitamin A intake on alimentary cholesterolemia was investigated in cockerels of strains of White Leghorns and New Hampshires. With the New Hampshire cockerels, the feeding of 0.5% of dietary cholesterol resulted in greater cholesterolemia when the diet contained 1 700 I.U. of vitamin A per kilogram than when it contained 22 000 I.U. of vitamin A per kilogram. With the White Leghorn cockerels, on the other hand, cholesterolemia was enhanced with the higher level of dietary vitamin A. Absorption of a single oral dose of cholesterol was increased in birds of both breeds when vitamin A had been given previously by injection. In the White Leghorn cockerels the percentage of newly absorbed cholesterol in the hepatic pool was reduced by vitamin A administration, whereas in the New Hampshire cockerels the percentage was increased. It was concluded that excess vitamin A may have divergent effects on alimentary cholesterolemia in chickens of different genetic backgrounds as a result of opposite effects on the liver–blood ratio of a large load of cholesterol.

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