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Genetic inference of the mating system of free-ranging domestic dogs
Behavioral Ecology ( IF 2.4 ) Pub Date : 2021-02-04 , DOI: 10.1093/beheco/arab011
Eugenia Natoli 1 , Roberto Bonanni 1, 2, 3, 4 , Simona Cafazzo 1, 2, 3, 4 , Daniel S Mills 2 , Dominique Pontier 3 , Małgorzata Pilot 4
Affiliation  

Domestication has greatly changed the social and reproductive behavior of dogs relative to that of wild members of the genus Canis, which typically exhibit social monogamy and extended parental care. Unlike a typical gray wolf pack that consists of a single breeding pair and their offspring from multiple seasons, a group of free-ranging dogs (FRDs) can include multiple breeding individuals of both sexes. To understand the consequences of this shift in reproductive behavior, we reconstructed the genetic pedigree of an FRD population and assessed the kinship patterns in social groups, based on genome-wide single-nucleotide polymorphism genotypes. Consistent with behavioral observations, the mating system of the study population was characterized by polygynandry. Instead of the discreet family units observed in wolves, FRDs were linked by a network of kinship relationships that spread across packs. However, we also observed reproduction of the same male–female pairs in multiple seasons, retention of adult offspring in natal packs, and dispersal between neighboring packs—patterns in common with wolves. Although monogamy is the predominant mating system in wolves, polygyny and polyandry are occasionally observed in response to increased food availability. Thus, polygynandry of domestic dogs was likely influenced by the shift in ecological niche from an apex predator to a human commensal.

中文翻译:

自由放养家犬交配系统的遗传推断

相对于犬属的野生成员,驯化极大地改变了狗的社会和生殖行为,这些野生成员通常表现出社会一夫一妻制和长期的父母照顾。与典型的灰狼群不同,典型的灰狼群由单个繁殖对及其多个季节的后代组成,一群自由放养的狗 (FRD) 可以包括多个繁殖个体。为了了解这种生殖行为转变的后果,我们基于全基因组单核苷酸多态性基因型,重建了 FRD 人群的遗传谱系并评估了社会群体中的亲属关系模式。与行为观察一致,研究人群的交配系统以一夫多妻制为特征。而不是在狼身上观察到的谨慎的家庭单位,FRD 由分布在各个群体的亲属关系网络连接起来。然而,我们还观察到相同的雄性 - 雌性对在多个季节的繁殖,成年后代保留在出生包中,以及相邻包之间的分散——与狼相同的模式。虽然一夫一妻制是狼的主要交配系统,但偶尔会观察到一夫多妻制和一妻多夫制,以应对食物供应的增加。因此,家犬的一夫多妻制可能受到生态位从顶级捕食者到人类共生体的转变的影响。虽然一夫一妻制是狼的主要交配系统,但偶尔会观察到一夫多妻制和一妻多夫制,以应对食物供应的增加。因此,家犬的一夫多妻制可能受到生态位从顶级捕食者到人类共生体的转变的影响。虽然一夫一妻制是狼的主要交配系统,但偶尔会观察到一夫多妻制和一妻多夫制,以应对食物供应的增加。因此,家犬的一夫多妻制可能受到生态位从顶级捕食者到人类共生体的转变的影响。
更新日期:2021-02-04
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