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首页> 外文期刊>International Journal of Scientific World >Heritability estimates of egg weight and egg shell weight in Ikenne, Nigeria
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Heritability estimates of egg weight and egg shell weight in Ikenne, Nigeria

机译：尼日利亚伊肯省鸡蛋重量和蛋壳重量的遗传力估计

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This study is designed to determine the inheritance pattern of egg weight and egg shell weight of exotic laying chickens at 25, 51, 72 weeks and overall mean ages of the birds. For this purpose, thirty eggs were collected daily from the birds continuously for five days of egg production, at each ages 25, 51 and 72 weeks. The total number of eggs collected at each age was 150 and 450 for the total of three age periods. The mean values of egg weight and egg shell weight revealed an apparent increase from 25-72 weeks of age with their corresponding overall mean values. The least square means of egg shell weight at different age groups are significantly different at (P0.01) while egg weight was significantly the same since egg shell weight depends on age variance for adequate performance. Statistical analytical system was used to obtain the variance components for the estimation of heritability. High and moderate heritability estimates were obtained when the age variance were included in the computation at different age groups for both traits while high, moderate and low estimates were obtained when the age variances were excluded. The heritability estimates from different egg quality traits were low to high. Since egg weight yielded high estimates at various age groups, the low and moderate heritability estimates recorded for egg shell weight imply that collection of additional records and improvement of non-genetic factors influencing the trait will improve the accuracy of characterizing the inherent ability of the birds.
机译：本研究旨在确定25、51、72周外来产蛋鸡的蛋重和蛋壳重的遗传模式以及禽的总体平均年龄。为了这个目的，每天在25、51和7​​2周龄的蛋上连续五天从禽类中收集三十个卵。每个年龄段的三个年龄段的总卵数分别为150和450。鸡蛋重量和蛋壳重量的平均值显示，从25-72周龄开始，其相应的总体平均值明显增加。不同年龄组的蛋壳重量的最小二乘均值在（P <0.01）时有显着差异，而蛋重则显着相同，这是因为蛋壳的重量取决于年龄的差异，才能获得适当的性能。使用统计分析系统获得方差分量，以评估遗传力。当两种特征在不同年龄组的计算中都包括年龄差异时，可获得高和中度遗传力估计值，而当排除年龄差异时，可获得高，中和低遗传力估计值。不同蛋品质性状的遗传力估计值从低到高。由于卵重在各个年龄段的估计值较高，因此对蛋壳重量记录的中低遗传力估计值表明，收集更多记录和改善影响性状的非遗传因素将提高表征禽类固有能力的准确性。 。

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