Kestin S C, Su G, Sørensen P
Department of Clinical Veterinary Science, University of Bristol, Langford, United Kingdom.
Poult Sci. 1999 Aug;78(8):1085-90. doi: 10.1093/ps/78.8.1085.
A trial was conducted to investigate the susceptibility of different genotypes of broilers to leg weakness. Four crosses of commercial broiler lines were assessed. Birds were reared on commercial diets at commercial stocking densities. Indices of leg weakness examined included: walking ability, tibial dyschondroplasia (TD), foot pad burn, hock burn, and angulation of the hock joint. Body weight and feed efficiency were also measured. There were small differences in BW and feed efficiency among the commercial crosses; however, there were large differences in some of the indices of leg weakness among the crosses. Three crosses had similar prevalence of TD; one cross had much less TD than the others. There were large differences in walking ability among crosses. There were also differences among crosses in the prevalence of foot pad and hock burn and angulation of the hock joint. Adjusting the observations for differences in BW did not substantially alter the findings. There were differences among genotypes regarding the correlation coefficients between walking ability and BW, walking ability and hock burn, and TD and BW. It was concluded that there were large differences in some important traits associated with leg weakness among the commercial line crosses.
进行了一项试验，以研究不同基因型肉鸡对腿部无力的易感性。评估了四个商业肉鸡品系的杂交组合。鸡只以商业饲养密度用商业饲料饲养。所检查的腿部无力指标包括：行走能力、胫骨软骨发育不良（TD）、脚垫灼伤、跗关节灼伤以及跗关节角度。还测量了体重和饲料效率。各商业杂交组合之间的体重和饲料效率存在微小差异；然而，各杂交组合之间在一些腿部无力指标上存在较大差异。三个杂交组合的TD发生率相似；一个杂交组合的TD比其他组合少得多。各杂交组合之间的行走能力存在很大差异。各杂交组合在脚垫和跗关节灼伤发生率以及跗关节角度方面也存在差异。对体重差异进行观测调整并没有实质性改变研究结果。不同基因型在行走能力与体重、行走能力与跗关节灼伤以及TD与体重之间的相关系数方面存在差异。得出的结论是，各商业品系杂交组合之间在与腿部无力相关的一些重要性状上存在很大差异。
