Correlated Responses to Bi-Directional Selection for Sheep Red Blood Cell Titer in White Leghorns

文献类型： 外文期刊

第一作者： Zhu, Qing

作者： Zhu, Qing;Hu, Yao-Dong;Wen, Jie;Zheng, Mai-Qing;Liu, Ran-Ran;Chen, Ji-Lan;Zhao, Gui-Ping

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期刊名称：JOURNAL OF ANIMAL AND VETERINARY ADVANCES （ 影响因子：0.365； 五年影响因子：0.359 ）

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收录情况： SCI

摘要： Four generations of bi-directional selection for antibody response to challenge with SRBC on days 56 were completed in White Leghorn chickens. The anti-SRBC titer and other immune traits were measured in up-selected (H), down-selected (L) and Control (C) lines in each Generation (G0-G4) and reproductive traits were measured in G4. In the 4th generation, the difference in SRBC titers (measured on days 61) between the selected lines was 7.18 versus 6.1 0, a 17% increase in the H compared to the L lines. The heritability of SRBC titer was 0.26. The genetic correlations between anti-SRBC and IgG (0.87) and IgM (0.81) were high and those between SRBC titers and those against AI (0.56), ND (0.48) and the H/L ratio (0.58) were moderate. Immune and reproductive traits compared among the H, L and C lines in the final Generation (G4) showed that AI, ND and IgM were improved significantly (p<0.05) by selection for SRBC but the age at first lay was slightly delayed (0.48 days) in the H line. This study demonstrates that selecting for antibody response to SRBC improves other immune traits consistent with broad disease resistance of chickens.

分类号： S

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