caa a22 4500 397567812 CHVBK 20180308164832.0 cr unu---uuuuu 161202e199612 xx s 000 0 eng 10.3382/ps.0751455 doi (NATIONALLICENCE)oxford-10.3382/ps.0751455 Utilization of the Sex-Linked Gene for Imperfect Albinism (S*ALS) [Elektronische Daten] 2. Yolk Sac Lipid Utilization1 [G. A. SANTOS, F. G. SILVERSIDES] The gene for sex-linked imperfect albinism (S*ALS) has been associated with reduced early growth and slow utilization of the yolk sac contents. Neonatal growth was studied using albino and nonalbino full siblings that were dissected at 2-d intervals from Day 16 of incubation to 7 d after hatch. Fatty acid composition of the yolk, yolk sac membrane, and liver was determined to study neonatal lipid metabolism. At hatch, albinos had similar BW and lower (P < 0.01) liver weights, suggesting reduced lipid transfer from the yolk sac during late incubation. Nonalbinos started gaining weight at 3 d after hatch, 1 d earlier than albino chicks. Albinos had reduced growth (P < 0.01), larger yolk sacs (P < 0.05), and similar (P > 0.05) yolk uptake from hatch to 7 d after hatch. Albino chicks also had lower body temperatures (P < 0.05) at 2, 4, and 6 d after hatch. Albinos had a slower rate of transfer of yolk lipids to the developing embryo in the last 2 d of incubation. The fatty acid composition of the yolk and yolk sac membrane was similar for both genotypes during the last 3 d of incubation, except for the level of stearic acid, which was higher (P < 0.05) for nonalbinos on Day 18 of incubation for both tissues and at 1 d after hatch for the yolk. The fatty acid composition of the livers of albinos and nonalbinos were similar (P > 0.05) during the neonatal period. For both genotypes, the hepatic level of oleic acid increased to Day 20 of incubation, remained constant to 1 d after hatch, and decreased sharply thereafter. The major difference between the genotypes was a slower rate of transfer of yolk lipids to the developing albino embryo in the last 2 d of incubation. © 1996 Poultry Science Association, Inc. Breeding and Genetics nationallicence S*ALS nationallicence sex-linked albinism nationallicence chicken nationallicence lipid metabolism nationallicence yolk sac utilization nationallicence SANTOS G. A. aut SILVERSIDES F. G. 2To whom correspondence should be addressed. aut Poultry Science Oxford University Press 75/12(1996-12), 1455-1462 0032-5791 75:12<1455 1996 75 ps https://doi.org/10.3382/ps.0751455 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.3382/ps.0751455 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- SANTOS G. A. aut NATIONALLICENCE 700 1- SILVERSIDES F. G. 2To whom correspondence should be addressed aut NATIONALLICENCE 773 0- Poultry Science Oxford University Press 75/12(1996-12), 1455-1462 0032-5791 75:12<1455 1996 75 ps Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence SWISSBIB 397567340 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford