Sheridan A K, Howlett C R, Burton R W
Br Poult Sci. 1978 Jul;19(4):491-9. doi: 10.1080/00071667808416505.
A breeding programme to develop a line of chickens with a high incidence of tibial dyschondroplasia (TD) from Australian broiler stock is described. Despite the absence of a control flock, this programme has demonstrated that selection in a broiler population can rapidly increase the incidence of TD. There was consistent circumstantial evidence of the presence of a major sex-linked gene, the recessive allele of which is associated with an increased incidence of TD. The realised heritability estimates (obtained in the absence of a control flock) consistently exceeded 1.00, suggesting the presence of an environmental trend favourable to the onset of TD over the four generations of this investigation. There was a high maternal component or dominance genetic component, or both, for the inheritance of TD in the final generation, suggesting that environmental factors associated with the female parent line may influence the incidence of TD in broilers.
本文描述了一项利用澳大利亚肉鸡种群培育胫骨软骨发育不良（TD）高发品系鸡的育种计划。尽管没有对照鸡群，但该计划已证明，在肉鸡群体中进行选择可迅速提高TD的发病率。有一致的间接证据表明存在一个主要的性连锁基因，其隐性等位基因与TD发病率增加有关。在没有对照鸡群的情况下获得的实际遗传力估计值始终超过1.00，这表明在本研究的四代中存在有利于TD发病的环境趋势。在最后一代中，TD的遗传存在较高的母体成分或显性遗传成分，或两者兼而有之，这表明与雌性亲本系相关的环境因素可能会影响肉鸡中TD的发病率。
