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首页> 外文期刊>Indian Journal of Poultry Science >Genetics of immunocompetence traits in white leghorn chicken divergently selectedfor humoral response to sheep erythrocytes
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Genetics of immunocompetence traits in white leghorn chicken divergently selectedfor humoral response to sheep erythrocytes

机译：不同来回选择对绵羊红细胞进行体液反应的白来亨鸡免疫功能性状的遗传

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摘要

Immunocompetence (IC) traits viz., antibody response to SRBC, serum lysozyme and IgG concentration were studied in 484 chicks (330 and 154 from HSRBC and LSRBC lines) at the age of 5-6 weeks belonging to third generation of specialized white Leghorn chicken lines divergently selected for humoral response to sheep erythrocytes. Genetic and phenotypic parameters were estimated using half-sib correlation method separately for both the lines, taking hatch and sex as fixed effects in the model. Least squares means of HA titre, sei-um lysozyme and serum IgG were 8.06 +- 0.22, 2.85 +- 0.08/ml and 33.91 +- 1.68 mg/ml in HSRBC and 7.87 +- 0.26, 2.77 +- 0.09 /ml and 31.65 +- 1.28 mg/ml in LSRBC lines. All the traits in both the lines were significandy affected by hatch. Significant (P<0.05) sexual dimorphism was observed in serum lysozyme levels in HSRBC line. Heritability estimates were low in HSRBC line and could not be estimated in LSRBC line, probably due to smaller sample size. Phenotypic correlations among IC traits in both lines were low (P>0.05). Divergent selection significantly influenced humoral response and serum IgG levels; HSRBC line demonstrated higher magnitudes. It may be inferred that selection for response to sheep erythrocytes alone or in combination with other facets of immunity may improve the host defense in layer chicken.
机译：研究了5-6周龄的484只雏鸡（来自HSRBC和LSRBC系的330和154只）的免疫能力（IC）特性，对SRBC的抗体反应，血清溶菌酶和IgG浓度，属于第三代白色来亨鸡针对绵羊对红细胞的体液反应而发散选择的品系。遗传和表型参数分别使用半同胞相关方法对两个品系进行估计，并以孵化和性别为模型中的固定效应。在HSRBC中，HA滴度，血清溶菌酶和血清IgG的最小二乘平均值分别为8.06±0.22、2.85±0.08 / ml和33.91±1.68 mg / ml和7.87±0.26、2.77±0.09 / ml和31.65 LSRBC品系中的±1.28 mg / ml。两条线的所有特征都受到孵化的影响。 HSRBC品系的血清溶菌酶水平观察到显着（P <0.05）性二态性。在HSRBC品系中，遗传力估计值较低，而在LSRBC品系中，无法估计，可能是由于样本量较小。两系IC性状之间的表型相关性均较低（P> 0.05）。不同的选择显着影响体液反应和血清IgG水平。 HSRBC线表现出更高的幅度。可以推断，选择单独或结合其他免疫方面对绵羊红细胞的反应选择可以改善蛋鸡的宿主防御能力。

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