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.

The inheritance of shank colour in single comb White Leghorn and Australorp fowls

1951 ◽  
Vol 2 (4) ◽  
pp. 494
Author(s):  
F Skaller ◽  
GW Grigg
Keyword(s):  
White Leghorn ◽  
Genetical Analysis ◽  
Different Types ◽  
White Leghorns ◽  
Single Comb ◽  
Mode Of Inheritance

Evidence has been presented in the literature on the mode of inheritance of shank colour in various breeds of chickens, but little has hitherto been known about the same aspect in an Australian breed, the Black Australorp. Observations on the incidence of shank colour in different types of crosses between yellow-shanked White Leghorns and black-shanked Australorps are reported in this paper. According to the observations made by other workers on White Leghorn and other breeds, a hypothesis is advanced regarding the genes involved in determining shank colour in the White Leghorn and Australorp. A genetical analysis of the observations made by the authors on 847 single crosses, 71 backcrosses, and 31 zig-zag crosses is presented and shows close statistical agreement with the hypothesis. A genetical formula, including four autosomal and two sex-linked genes, is suggested which would explain the mode of inheritance of shank colour in White Leghorns and Australorps.

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 The Rate of Growth of Single Comb Rhode Island Reds

1921 ◽  
Vol 1 (2) ◽  
pp. 39-43 ◽  
Author(s):  
B.F. KAUPP
Keyword(s):  
Rhode Island ◽  
Rate Of Growth ◽  
Single Comb
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