DOMINANT AMBER D 843 is a very attractive coloured program with laying hens having brown marking on the wings and back, which stands out particularly on the basic, white colouration of the whole body. The program uses sexing options according to the genetically determined different flight feather growth rate; one-day-old cockerels have slow growth rate and hens have fast growth rate. It is very popular as final hybrid for self-sufficient and alternative farms. The capons are used for the production of traditional highly delicious poultry meat. The asset is the high productivity, namely laying about 300 eggs. Light brown eggshell colour is characteristic.
This program is the result of cross breeding fast feathering Rhode Island White (RIW) paternal population with allele of the recessive gene "k" for feathering rate "K/k" and the slow feathering red RIR with a dominant allele "K" maternal population. When hatching one-day-old chickens, feather sexing using the "K/k" allele, where one-day-old cockerel acquires the dominant allele of this "K" gene from the mother and is slow feathering and one-day-old hen acquires the recessive "k" allele from the father and is fast feathering, which is evident on one- day-old chickens’ flight feathers.
