scholarly journals Statistical Studies on the Inheritance of Rate of Laying in White Leghorns and Rhode Island Reds

1936 ◽  
Vol 15 (1) ◽  
pp. 63-66 ◽  
Author(s):  
A.B. Godfrey ◽  
Morley A. Jull
Keyword(s):  
Rhode Island ◽  
White Leghorns ◽  
Statistical Studies

scholarly journals Statistical Studies of the Variations in the Growth of Single Comb White Leghorns and their Significance

1930 ◽  
Vol 9 (3) ◽  
pp. 157-163 ◽  
Author(s):  
E.M. FUNK ◽  
H.C. KNANDEL ◽  
E.W. CALLENBACH
Keyword(s):  
White Leghorns ◽  
Statistical Studies ◽  
Single Comb

scholarly journals NUTRITIONAL ENCEPHALOMALACIA IN CHICKS

1933 ◽  
Vol 57 (3) ◽  
pp. 365-371 ◽  
Author(s):  
Alwin M. Pappenheimer ◽  
Marianne Goettsch ◽  
Keyword(s):  
Rhode Island ◽  
Feeding Period ◽  
White Leghorns ◽  
Natural Foods ◽  
Percentage Incidence

1. Nutritional encephalomalacia may be induced in chicks up to the age of approximately 2 months. As the preliminary feeding period on a natural foods diet is increased, the percentage incidence of the disease becomes progressively less. The average time between institution of diet and appearance of the disease tends to diminish. 2. There is no correlation between growth and incidence of the disease. 3. White Leghorns, Barred Plymouth Rocks, Rhode Island Reds, and White Wyandottes are equally susceptible.

Nutrition

1936 ◽  
Vol 9 (3) ◽  
pp. 172-202
Keyword(s):  
Vitamin A ◽  
Rhode Island ◽  
White Leghorns

Effect on various Breeds of Poultry of the Lack of Vitamin A. Sul comportamento di alcune Razze di Polli sottoposti a carenza di Vitamine A. Dr. A. Scaccini. Rivista di Avicultura, 1935, p. 359.Rhode Island Chickens appeared to be more sensitive than White Leghorns to the lack of Vit. A.

scholarly journals A Test of Crossbred Chickens, Single Comb White Leghorns and Rhode Island Reds

1938 ◽  
Vol 17 (3) ◽  
pp. 193-199 ◽  
Author(s):  
Charles W. Knox ◽  
Marlow W. Olsen
Keyword(s):  
Rhode Island ◽  
White Leghorns ◽  
Single Comb

Breeding

1933 ◽  
Vol 6 (1-2) ◽  
pp. 51-74
Keyword(s):  
Rhode Island ◽  
Hybrid Vigor ◽  
Red Cross ◽  
List Type ◽  
White Leghorn ◽  
Pure Strain ◽  
Wing Feather ◽  
White Leghorns ◽  
Growth Method ◽  
Single Comb

Crossbred Poultry. Hybrid Vigor. D. C. Warren, Agricultural Experimental Station, Manhattan, Kansas. Bulletin, 252.Summary:1.Crosses between the Single Comb White Leghorn and Jersey Black Giant showed the resulting hybrids to be superior to the two pure breeds in all measurements of vigor.2.The results from the Single Comb White Leghorn-Single Comb Rhode Island Red cross showed the hybrids to be generally superior to the pure breeds, but in a few comparisons the hybrids only equalled the better of the two breeds involved.3.The crosses of Single Comb White Leghorns by Barred Plymouth Rocks and of Single Comb Rhode Island Reds by Barred Plymouth Rocks produced hybrids that in each case were superior to the pure breeds involved, for chick mortality and rate of growth, these being the only criteria of vigor considered.4.Crosses between independently bred strains of Single Comb White Leghorns produced offspring that were in some respects superior to the pure strain progeny, but the degree of stimulation did not appear to be so great as in the crosses of different breeds.5.Sex of chicks may be distinguished at hatching by means of sex-linked down colours in crossbred chicks.6.The new method utilising the growth of wing feathers at hatching is slightly less accurate for identifying the sexes, but has certain advantages over the down-colour method.7.The advantages of the wing feather growth method are that it makes available the White Leghorn breed, which is widely popular and well bred for production; it produces a white hybrid; and greatly extends the list of breeds available for crossing to distinguish sex at hatching.8.The superior vigour of some hybrids probably makes them more economical than most pure breeds for the poultryman whose major income is from market poultry and eggs.

scholarly journals PERFORMANCE OF EGG-STRAIN BIRDS DURING THEIR COMMERCIAL LIFE CYCLE WHEN CONTINUOUSLY FED DIETS CONTAINING TOWER RAPESEED GUMS

1978 ◽  
Vol 58 (2) ◽  
pp. 183-189 ◽  
Author(s):  
J. D. SUMMERS ◽  
S. LEESON ◽  
S. J. SLINGER
Keyword(s):  
Life Cycle ◽  
Rhode Island ◽  
Soybean Meal ◽  
Feed Intake ◽  
Egg Production ◽  
Rapeseed Meal ◽  
Offspring Performance ◽  
Commercial Strain ◽  
White Leghorns ◽  
Poultry Diets

In response to queries regarding the long-term effect of utilizing rapeseed gums in poultry diets, an experiment was initiated in which this product was continuously fed throughout the life cycle of the laying hen. Treatments consisted of: (1) soybean meal control, (2) 15% Tower rapeseed meal (3) 15% Tower rapeseed containing 1.5% of rape gums (4) soybean meal containing 1.5% of rape gums, and (5) soybean meal containing 1.5% of soy gums. The meals containing gums were manufactured in Western Canada. The diets were offered to one commercial White Leghorn and University strains of White Leghorns and Rhode Island Red, with conventional dietary specifications used in relation to age of bird. Gums had no persistent effect on feed intake or body weight of pullets from day of age to 20 wk. During this period mortality was low and not influenced by diet. In a subsequent laying period of 308 days, these same dietary treatments had no significant effect on egg production, while breed differences influenced all parameters measured. The addition of gums to rapeseed meal caused a reduction in egg size for a commercial strain of White Leghorns while the converse was true for a Guelph strain of White Leghorns. This apparent dichotomy may have been related to differences in feed intake. Diet had no influence on fertility or hatchability or on the performance of subsequent offspring when these were fed diets comparable to those of their dams. It is concluded that no toxic effects in terms of productive performance accrue from the use of up to 15% Tower rapeseed meal which contains 1.5% rapeseed gums, when fed throughout the commercial life cycle of egg strain birds and their offspring. Performance data also indicate that the addition of such gums to soybean meal offers an alternative means of their disposal.

Sign in / Sign up

Export Citation Format

Share Document