根据雏鸡血清酶活性对蛋鸡进行早期选种的研究

STUDY ON EARLY SELECTION FOR LAYER BASED ON SERUM ENZYMATIC ACTIVITIES OF CHICKS

本研究测定了147只8、12周龄S220母雏血清碱性磷酸酶(AKP)、谷草转氨酶和乳酸脱氢酶活性,估测其遗传力及其与产蛋性能间的表型相关和遗传相关。结果表明,8周龄血清AKP活性遗传力为0.62,300日龄产蛋量遗传力为0.20,两者间的遗传相关为0.8245。利用8周龄血清AKP活性作为辅助性状对300日龄产蛋量进行间接选择,其间接选择效率为个体选择的1.4519倍,为家系选择的1.4837倍,为合并选择的1.1887倍。因此,8周龄血清AKP活性可作为蛋鸡早期选种血液生化指标之一。

The activities of serum alkaline phosphatase ( AKP ) , glutamic axalo-acetic transaminase and lactic dehydrogenase of 147 at age of 8-and 12-wk White Leghorn Line S220 chicks were tested in this paper.The phenotypic and genetic correlations between these enzymatic activities and egg laying performances as well as heritabilities of these enzymatic activities were estimated. The results showed that the heritabilities both of serum AKP activity at 8-wk ( 8-SAAW ) and of egg production at 300-days ( 30G-EPD ) and their genetic correlation were 0.62, 0.20 and 0.8245, respectively. The efficiency of indirect selection to 300-EPD by 8-SAAW as the secondary trait was 1.4519, 1.4837 and 1.1887 times as large as individual selection, family selection and combination selection, respectively. Hence, 8-SAAW can be regarded as one blood biochemical indexes of layer for early selection.