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“Guide to Poultry Mating Systems and Techniques” The manner in which the selected individuals (both males and females) mate is also of considerable significance in realising response to selection. Mating systems do not change the gene frequency like selection but depending upon the procedure used rearrange the genotypic frequency. Random mating, positive assortative mating, inbreeding
“Poultry Selection: Basis and Breeding Methods” For highly heritable traits like body weight and egg weight selection of individuals is adjudged best on the basis of their phenotypic performance; it yields satisfactory results. This is known as individual selection. Selection on the basis of family averages, i.e. family selection, is advocated for improving lowly heritable
“Poultry Genetic Principles: Basics of Breeding” The phenotypic expression of an individual is due to its genotype and the influence of the environment to which the genotype is subjected. The genotype refers to the genes it contains. The genes are the basic units of inheritance and are arranged linearly on the chromosomes. They constitute the
Livestock farming has emerged as one of the major sources of income in rural areas. The drier and the more underdeveloped an area, the more is the contribution of livestock towards income of the rural people. In livestock farming, the main expenditure is on feeding animals. I account for about 70 percent or more of
Poultry English Class The breeds of English origin are mostly utility breeds noted for their excellent fleshing properties. With the exception of Cornish, all the English breeds have white skin and red ear lobes. Except Dorking and Red Cap all other breeds of this class lay brown-shelled eggs. All are classed as broody, but this