Body Growth, Egg Production, Broodiness, Age at First Egg and Egg Size in Red Jungle Fowls, and an Attempt at Their Genetic Analyses by the ReciprocaI Crossing with White Leghorns
نویسندگان
چکیده
منابع مشابه
Effect of High and Low Stocking Density on Age of Maturity, Egg Production, Egg Size Distribution in White and Brown Layer Hens: A Meta-analysis
Data of four layers flocks (#31-34) from North Carolina Layer Performance and Management Test of the Department of Agriculture and Consumer Services were used in the meta-analysis to find if an increase in space allowance can affect egg production traits in white and brown layers. Effects of space allowance of 310 and 413 cm2/bird on layers performance were compared in this study. The increase ...
متن کاملEvaluation of different egg quality traits and interpretation of their mode of inheritance in White Leghorns.
AIM The experiment was carried out to evaluate different external and internal egg quality traits and to figure out their mode of inheritance from a set of hierarchically classified data. MATERIALS AND METHODS The data collected from 548 progenies (1 egg from each progeny) of 282 dams mated to 47 sires (1 sire mated to 6 dams) of a White Leghorn flock were used in the present study. Phenotypi...
متن کاملEgg components, egg size, and hatchling size in leatherback turtles.
Relationships between egg size, egg components, and neonate size have been investigated across a wide range of oviparous taxa. Differences in egg traits among taxa reflect not only phylogenetic differences, but also interactions between biotic (i.e., maternal resource allocation) and abiotic (i.e. nest environment conditions) factors. We examined relationships between egg mass, egg composition,...
متن کاملStudy of Dopamine Receptor Gene Polymorphisms and Their Association with Growth and Egg Production Traits in West Azerbaijan Native Chicken
The objective of this study was to search for single nucleotide polymorphism (SNP)-type polymorphisms in the dopamine D1 receptor in West Azerbaijani native chicken and look for their association with egg production and body weight traits of chickens by polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP). For this purpose 180 blood samples were taken from nativ...
متن کاملFirst and Second Cycle Egg Production Relationships
A study of 1231 first cycle and 887 second cycle table egg flocks (by Bell and Adams) in the early 1980’s in California revealed a series of very important relationships. These relationships are essential to the decision of whether or not flocks should be molted and if so, when? If molting is to pay, the second cycle of production must yield high performance compared to a one cycle option. The ...
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ژورنال
عنوان ژورنال: Japanese poultry science
سال: 1979
ISSN: 0029-0254
DOI: 10.2141/jpsa.16.121