Genetic Relatedness of Pearl Grey Guinea Fowl and Single Comb White Leghorn Chickens
نویسندگان
چکیده
منابع مشابه
Phenotypic diversity, major genes and production potential of local chickens and guinea fowl in Tamale, northern Ghana
OBJECTIVE Our study provides information on phenotypes of local chickens and guinea fowl and their body measures as well as on major genes in local chickens in northern Ghana. METHODS Qualitative and morphometric traits were recorded on 788 local chickens and 394 guinea fowl in urban households in Tamale, Ghana. RESULTS The results showed considerable variation of color traits and numerous ...
متن کاملModeling ovarian follicle growth in commercial and heritage Single Comb White Leghorn hens.
Approximately 84% of the energy in chicken eggs resides in the yolk. A robust model of ovarian follicle development is therefore valuable for estimating energy requirements of laying hens. The current experiment was designed to model the growth of ovarian follicles in 32-wk-old modern commercial line (CL) and unselected heritage line (HL) Single Comb White Leghorn hens. The volume of yolk depos...
متن کاملDevelopmental stability in stocks of White Leghorn chickens.
The degree of asymmetry in bilateral morphological characters may reflect genetic and environmental stressors. Shank length and diameter, weight and length of the first primary wing feather, and distance between the junction of upper and lower mandibles and auditory canal (face length) were used to classify bilateral types and measure relative asymmetry (RA) in six genetic stocks. The stocks we...
متن کاملThe effects of different beak trimming techniques on plasma corticosterone and performance criteria in Single Comb White Leghorn hens.
DeKalb XL chicks were given a beak trim at 6 d of age (6DP) with a 2.8-mm gauge and a beak trim at 11 wk (11WB) with a block cut approximately 2 mm anterior to the nasal openings. Corticosterone (CS) levels of the 6DP treatment were (P < or = 0.01) elevated above nontrimmed CS levels at 2 h posttrim; and BW and feed consumption (FC) of the 6DP were depressed until 8 wk of age. At 11 wk of age, ...
متن کاملEffect of several dermatitis preventing agents on foot pad dermatitis in dwarf and normal sized single comb white Leghorn layers.
Studies were conducted to determine the effects of increased dietary levels of vitamin and trace mineral mixtures, methionine, meat and bone meal, fish meal, and safflower oil on foot pad dermatitis in dwarf and normal size Single Comb White Leghorn layers. All layers were maintained in individual wire cages throughout a 40-week experiment period. Individual birds were scored for the incidence ...
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ژورنال
عنوان ژورنال: The Journal of Poultry Science
سال: 2010
ISSN: 1346-7395,1349-0486
DOI: 10.2141/jpsa.010010