Breeding for Egg Weight and Related Characters
نویسندگان
چکیده
منابع مشابه
I . mproved Egg Size high heritability of egg weight gives rapid response to selective breeding
Breeding for egg size differs in several important respects from other problems of poultry breeders. In the improvement of egg number, livability, hatchability and many other economically important characters, the breeder always selects in one direction. His goal is to have the birds in his flock lay the largest possible number of eggs, live as long as possible, at least until he i s ready to d...
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The study was conducted to determine the effects of turkey (Meleagris gallopavo)egg weight on certain egg traits and hatching performance. A total of 178 turkey eggs comprising of three different egg weight groups below 60 g (G I), 61 to 69 g (G II) and above 70 g (G III) were used for this study. Average egg weight (g), egg length (cm), egg breadth (cm) and egg volume (cm3) values increased wi...
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Let V0, (, ) be the real Euclidean space spanned by the root system R0 of g and let V be the space of affine linear functions on V0. We shall identify V with Rδ ⊕ V0 via the pairing (rδ + x, y) = r + (x, y) for r ∈ R, x, y ∈ V0. The dual affine root system is R = {mδ + α | m ∈ Z, α ∈ R0} ⊆ V where α ∨ means 2α (α,α) as usual. Fix a positive subsystem R + 0 ⊆ R0 with base {α1, · · · , αn} and le...
متن کاملHeritabilities and Genetic Correlations for Egg Weight Traits in Iranian Fowl by Multi Trait and Random Regression Models
Objective: The main objective of this research was estimation of genetic parameters for five consecutive measurements of egg weights in Isfahan fowl using multi trait model and random regression models. Methods: The statistical models included generation-hatch as a fixed effect, weeks of age as a covariate and additive genetic and individual permanent environmental effects as random effects. Th...
متن کاملHeritabilities and Genetic Correlations for Egg Weight Traits in Iranian Fowl by Multi Trait and Random Regression Models
Objective: The main objective of this research was estimation of genetic parameters for five consecutive measurements of egg weights in Isfahan fowl using multi trait model and random regression models. Methods: The statistical models included generation-hatch as a fixed effect, weeks of age as a covariate and additive genetic and individual permanent environmental effects as random effects. Th...
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ژورنال
عنوان ژورنال: Poultry Science
سال: 1940
ISSN: 0032-5791
DOI: 10.3382/ps.0190254