Phenotypic and genomic analyses of agonistic interactions in laying hen lines divergently selected for feather pecking
Phenotypic and genomic analyses of agonistic interactions in laying hen lines divergently selected for feather pecking
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DOI：
10.1016/j.applanim.2020.105177
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发表时间：
2021-01-18
影响因子：
2.3
通讯作者：
Bennewitz, Joern
中科院分区：
文献类型：
--
作者：
Iffland, Hanna;Schmid, Markus;Bennewitz, Joern
在家禽中，攻击性啄和威胁是正常的争斗行为模式，用于建立社会等级。由于争斗行为是动物的一种应激源，其过度发生在蛋鸡群中是不希望的。啄羽行为是蛋鸡群体长期存在的一个严重问题，其与竞争行为的关系尚不清楚。因此，本研究以高啄羽量和低啄羽量两个不同选择的蛋鸡品系为研究对象，对它们的激惹和啄羽行为进行了表型和基因组分析。对母鸡的主动特征攻击性啄（APD）1，威胁（TD）2，羽毛啄（FPD）3和被动特征攻击性啄（APR）4，威胁（TR）5和羽毛啄（FPR）6进行表型分析。通过从各自的主动性状中减去被动性状来构建指数，以获得攻击指数、威胁指数和啄羽指数。由于所有三种行为模式在其过度表现中都是不受欢迎的，因此也通过结合主动和被动特征来定义指标特征主动和被动。结果表明，两个品系的FPD与APD和TD均呈极显著正相关，但高啄羽品系的相关系数较高。两个品系FPR的平均量几乎相同，并且在任何品系中均未发现FPR与FPD、APD或TD之间的相关性。活动性状和啄羽指数表现为中等遗传力，其余性状的遗传力较小。GWAS显示4个名义显著性（p
In poultry, aggressive pecking and threatening are normal agonistic behavior patterns which serve to establish a social hierarchy. As agonistic behavior is a stressor for animals, its excessive occurrence is undesired in layer flocks. Feather pecking is a longstanding serious problem in layer flocks and its relationship to agonistic behavior is still not clear. Therefore, phenotypic and genomic analyses of the agonistic and feather pecking behavior of two laying hen lines divergently selected for high and low feather pecking were conducted. The hens were phenotyped for the active traits aggressive pecks delivered (APD)1, threats delivered (TD)2, feather pecks delivered (FPD)3 and the passive traits aggressive pecks received (APR)4, threats received (TR)5 and feather pecks received (FPR)6. Indices were built by subtracting the passive traits from the respective active traits to obtain the aggression index, the threat index, and the feather pecking index. As all three behavior patterns in their excessive manifestations are undesired, the index-traits Activity and Passivity were also defined by combining each the active and passive traits. The results showed that FPD is significantly positive correlated with APD and TD in both lines, but with higher coefficients in the high feather pecking line. The average amount of FPR in both lines is nearly the same and no correlation was found between FPR and FPD, APD or TD in any of the lines. The active traits and the feather pecking index showed medium heritabilities, whereas the heritability was negligibly small for the other traits. GWAS revealed four nominal significant (p