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首页> 外文期刊>Tropical Animal Health and Production >Genetic parameters for body weights, egg traits and antibody response against Newcastle Disease Virus (NDV) vaccine among two Tanzania chicken ecotypes
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Genetic parameters for body weights, egg traits and antibody response against Newcastle Disease Virus (NDV) vaccine among two Tanzania chicken ecotypes

机译：坦桑尼亚两种生态型鸡的体重，卵性状和针对新城疫病毒（NDV）疫苗的抗体反应的遗传参数

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摘要

Genetic parameters were estimated for production traits and primary antibody response (Ab) against Newcastle diseases virus (NDV) vaccine among two Tanzania chicken ecotypes viz. Kuchi and Tanzania Medium (Medium). Production traits studied were body weights at 8 (Bwt8), 12(Bwt12), 16(Bwt16), and 20 (Bwt20) weeks of age, age at first egg (AFE), egg number in the first 90 days after sexual maturity (EN-90), egg weight (EW), egg shell thickness (STH), and egg shape index (ESI). Heritability estimates for Bwt8, Bwt12, Bwt16, Bwt20, AFE, EN-90, EW, STH, ESI and Ab for Kuchi chicken were 0.38 ± 0.10, 0.41 ± 0.07, 0.44 ± 0.08, 0.45 ± 0.09, 0.42 ± 0.10, 0.31 ± 0.05, 0.43 ± 0.08, 0.53 ± 0.11, 0.48 ± 0.13 and 0.27 ± 0.06, respectively. Corresponding estimates for Medium ecotype were 0.39 ± 0.09, 0.43 ± 0.10, 0.42 ± 0.08, 0.43 ± 0.07, 0.52 ± 0.11, 0.32 ± 0.06, 0.50 ± 0.07, 0.61 ± 0.13, 0.52 ± 0.10 and 0.29 ± 0.05, respectively. Genetic (r g) and phenotypic (rp) correlations in both ecotypes were highest among body weights (i.e. rg = 0.60 to 0.93 and rp = 0.54 to 0.78), and were lowest (around 0.10 and below, ranging from positive to negative) among primary antibody response against NDV vaccine and production traits, and among eggshell thickness, egg shape index and other production traits. The magnitudes of heritability estimates obtained in this study indicate good prospects of improving these traits in both ecotypes through selection.
机译：评估了坦桑尼亚两个生态型鸡的生产特性和针对新城疫病毒（NDV）疫苗的一抗反应（Ab）的遗传参数。库奇和坦桑尼亚中（中等）。研究的生产性状是分别在8（Bwt8），12（Bwt12），16（Bwt16）和20（Bwt20）周的体重，第一个卵（AFE）的年龄，性成熟后前90天的卵数（ EN-90），蛋重（EW），蛋壳厚度（STH）和蛋形指数（ESI）。库奇鸡的Bwt8，Bwt12，Bwt16，Bwt20，AFE，EN-90，EW，STH，ESI和Ab的遗传力估计为0.38±0.10、0.41±0.07、0.44±0.08、0.45±0.09、0.42±0.10、0.31±分别为0.05、0.43±0.08、0.53±0.11、0.48±0.13和0.27±0.06。中型生态型的相应估计分别为0.39±0.09、0.43±0.10、0.42±0.08、0.43±0.07、0.52±0.11、0.32±0.06、0.50±0.07、0.61±0.13、0.52±0.10和0.29±0.05。两种生态型的遗传（r g ）和表型（r p ）相关性在体重中最高（即r g = 0.60至0.93，并且r p = 0.54至0.78），并且在针对NDV疫苗的第一抗体反应和生产性状以及蛋壳厚度，蛋形指数和蛋清中最低（最低为0.10以下，从正到负）。其他生产特性。在这项研究中获得的遗传力估计值的大小表明通过选择改善两种生态型的这些性状的良好前景。

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