Use of autosexable chicken systems in the breeding of gene pools and populations

Sex separation of day old chicks in gene pool is of big practical importance, because growing of excessive male chicks until mature age is expensive and needs additional housing space. Creation of autosexable lines and breeds could act as a way of preservation of unique genetic complexes and reduction of rearing costs. Use of genotypes with marker genes accelerates genetic progress and increases efficiency of breeding. In the presented study there was investigated possibility to separate by sex day old chicks in gene pool populations of combined productivity types- Experimental-1 and Experimental CS. The egg-meat population Experimental -1 has been bred by crossing of Barred and Brown Leghorns. This population is sexable thanks to the interaction of genes «В» (Barring), «s⁺» (Silver), «e⁺» (Wild-type). The efficiency of selection of parents for colour auto-sexing of offspring and their own phenotype at 1-day age was studied to increase the accuracy of chicken separation by sex in the Experimental-1 population. For three generations of selection the accuracy of sexing in the population increased by 25% and reached 95.8%. The meat-egg population Experimental CS was created by crossing of Poltava Clay and New Hampshire hens with Pale-barred 4-line cocks of the cross “Broiler-6”. The resulted population is autosexable due to interaction of genes «В» (Barring), «s⁺» (Silver), «e^Wh» (Dominant wheaten). In one of the experimental groups the accuracy of sex separation by plumage coloration in day old chicks reached 96 %. The results of the investigation confirmed, that the breeding for this trait in Experimental-CS population is prospective.

chickens, genotype, phenotype, chick-sexing, plumage color, allele, locus

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