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首页> 外文期刊>Tropical Animal Health and Production >Non-genetic sources of variation and temporal variability in growth and feed efficiency traits among phylogenetically distinct clusters of indigenous chicken in Kenya
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Non-genetic sources of variation and temporal variability in growth and feed efficiency traits among phylogenetically distinct clusters of indigenous chicken in Kenya

机译：肯尼亚本地鸡系统发育上不同群的生长和饲料效率性状的非遗传变异和时间变异性来源

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摘要

This study aims to investigate the influence of non-genetic factors on feed efficiency in indigenous chicken. Residual feed intake (RFI), residual gain (RG) and residual intake and gain (RIG) were used as measures of feed efficiency. Feed intake and body weight data were collected on 107 experimental birds on a daily and weekly basis, respectively, from ages 11 to 20 weeks. A general linear model was fitted to determine the effect of sex, cluster, genotype and hatch group on mean performance and to assess temporal variation across clusters. The overall mean performance for daily gain (ADG), daily feed intake (ADFI), weekly metabolic body weight (MBW), RFI, RG and RIG was 10.38 g/day, 133.01 g/day, 164.12 g/day, 0.00 (+/- 14.23), 0.00 (+/- 1.83) and 0.00 (+/- 14.64), respectively. Sex significantly influenced variation in ADG and RG while hatch group influenced all traits except ADFI. Cluster and genotype had no effect on the traits. Interaction between sex and cluster significantly influenced ADFI, RFI and RIG. There was a significant temporal variation within and among clusters resulting in re-ranking of the phylogenetic groups in efficiency across the test period. Results indicate that growth and feed efficiency traits are influenced by non-genetic factors which should be accounted for, to reduce bias and improve accuracy of performance evaluations in the indigenous chicken.
机译：这项研究旨在调查非遗传因素对本地鸡饲料效率的影响。剩余饲料摄入量（RFI），剩余增重（RG）以及剩余摄入量和增重（RIG）被用作饲料效率的量度。每天和每周分别从11至20周龄的107只实验鸟收集采食量和体重数据。拟合了一个通用的线性模型，以确定性别，聚类，基因型和孵化组对平均性能的影响，并评估各个聚类之间的时间变化。日增重（ADG），日采食量（ADFI），每周代谢体重（MBW），RFI，RG和RIG的总体平均性能为10.38 g /天，133.01 g /天，164.12 g /天，0.00（+ /-14.23），0.00（+/- 1.83）和0.00（+/- 14.64）。性别显着影响ADG和RG的变异，而孵化组影响除ADFI以外的所有性状。聚类和基因型对性状没有影响。性别与群体之间的相互作用极大地影响了ADFI，RFI和RIG。集群内部和集群之间存在明显的时间变化，导致整个系统发育阶段效率的重新排序。结果表明，生长和饲料效率性状受到非遗传因素的影响，应减少非遗传因素，以减少土鸡的性能评估准确性。

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