Inheritance of bone characteristics affecting osteoporosis in laying hens
Inheritance of bone characteristics affecting osteoporosis in laying hens
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DOI：
10.1080/00071660086376
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发表时间：
2000-03-01
影响因子：
2
通讯作者：
Whitehead, CC
中科院分区：
文献类型：
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作者：
Bishop, SC;Fleming, RH;Whitehead, CC
1.在产蛋终了母鸡的骨骼中测量了一系列形态测量学、放射学和强度特征的遗传率。胫骨强度（TSTR）、肱骨强度（HSTR）和龙骨放射学密度（KRD）具有中度至强烈的遗传性，并结合在骨指数中，作为选择的基础。数据可用于6代/队列的母鸡（n=1306），其中最后3个是分歧选择的鸟类的后代。骨指数中使用的所有骨特征对趋异选择反应迅速，并且相互之间具有很强的相关性。在最后一代中，品系TSTR的差异为25%，HSTR的差异为13%，KRD的差异为19%。该指数的遗传力为0.4 ~ 0.4。在2个不同地点饲养的鸟类之间没有明显的基因型与环境的相互作用。与选择用于低骨强度的生产线相比，选择用于高骨强度的生产线的骨折发生率显著降低。肱骨骨折发生率在上一代中的差异为6倍。胫骨强度与骨折发生率呈二次曲线关系（r（2）=0.92，P
1. Heritabilities of a range of morphometric, radiological and strength characteristics were measured in the bones of end-of-lay hens.2. Tibial strength (TSTR), humeral strength (HSTR) and keel radiographic density (KRD) were moderately to strongly inherited and were combined in a Bone Index which was used as a basis for selection. Data are available on 6 generations/cohorts of hens (n=1306), the last 3 of which are the progeny of divergently selected birds.3. All bone characteristics used in the Bone Index responded rapidly to divergent selection and were strongly correlated with each other. In the last generation, the lines differed by 25% for TSTR, 13% for HSTR and 19% for KRD. The heritability of the index was 0.40.4. There were no apparent genotype by environment interactions between birds housed at 2 different locations.5. The incidence of bone fractures was significantly decreased in the line selected for high bone strength compared to the line selected for low bone strength. Humerus fracture incidence differed by a factor of 6 between the lines in the last generation. There was a strong quadratic relationship between tibia strength and overall fracture incidence (r(2)=0.92, P