caa a22 4500 397568991 CHVBK 20180308164836.0 cr unu---uuuuu 161202e199605 xx s 000 0 eng 10.3382/ps.0750585 doi (NATIONALLICENCE)oxford-10.3382/ps.0750585 A Method for Separating Sex-Linked Imperfect Albino (S*ALS) and Nonalbino Embryos Before Hatch [Elektronische Daten] [G. A. SANTOS, F. G. SILVERSIDES] The feasibility of using the sex-linked gene for imperfect albinism (S*ALS) to sex chicks during incubation by candling was studied. With this technique, the dark eye of nonalbino embryos can be positively identified. Two trials were performed. In a first trial, 66.5 and 89.5% of the 254 nonalbino and 210 albino chicks produced in four hatches were correctly identified by candling at 7 d of incubation. Of 191 eggs predicted to be nonalbinos, 22 were albinos, resulting in an overall accuracy of 88.5% for identification of nonalbino embryos. In a second trial, the accuracy of the technique from 7 to 10 d of incubation was evaluated. Increased age resulted in a tendency for lower accuracy, but candling at 8, 9, or 10 d of incubation allowed identification of a greater (P < 0.05) proportion of the nonalbino population than at 7 d of incubation. Candling at 8 d of incubation allowed identification of nonalbinos and albinos with an accuracy of 81.3 and 84.9%, respectively, suggesting that the *ALS gene could be used to sex chicks during incubation when used in a sex-linked cross. This technique may prove advantageous to the laying industry because of savings of incubator and hatcher space. The males of commercial layer lines are normally killed at hatch. Reducing the number that hatch by eliminating them before 10 d of incubation could diminish animal welfare concerns. © 1996 Poultry Science Association, Inc. Breeding and Genetics nationallicence sexing nationallicence candling nationallicence albinism nationallicence chicken nationallicence sex-linked gene nationallicence SANTOS G. A. aut SILVERSIDES F. G. 1To whom correspondence should be addressed. aut Poultry Science Oxford University Press 75/5(1996-05), 585-588 0032-5791 75:5<585 1996 75 ps https://doi.org/10.3382/ps.0750585 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.3382/ps.0750585 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- SANTOS G. A. aut NATIONALLICENCE 700 1- SILVERSIDES F. G. 1To whom correspondence should be addressed aut NATIONALLICENCE 773 0- Poultry Science Oxford University Press 75/5(1996-05), 585-588 0032-5791 75:5<585 1996 75 ps Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford