Selective breeding method for high-uniformity slaughter type high-quality spotted-brown chickens

The invention relates to the field of genetic breeding of domestic fowls and particularly relates to a selective breeding method for high-uniformity slaughter type high-quality spotted-brown chickens.The method comprises the steps: establishing three specialized lines, wherein a line A is a rapid-big spotted-brown chicken assorted terminal paternal line, is a normal type spotted chicken and is medium or relatively high in growth speed; a line B is a DW-linked-gene spotted-brown chicken pure line, is a dwarf type spotted chicken, is medium or relatively low in growth speed and contains an ultrarapid-big AA chicken blood line; and a line C is a normal type brown chicken and is medium or relatively high in growth speed; producing a parent-generation BC line by taking a cultured line C as a first female parent and taking a cultured line B as a first male parent; and producing commodity chickens ABC by taking a cultured line AA as a terminal male parent and taking selected and reserved hens of the parent-generatio