Nine blood biochemical indices of White Leghorn Line S220 chicks at age of 8 and 12 weeks were tested. The phenotypic and genetic correlations between these indices and egg laying performance as well as heritabilities of these indexes were estimated.

• 测定了8、12周龄S220母雏9项血液生化指标,估测其遗传力及其与产蛋性能间的表型相关和遗传相关。