Animal Molecular Breeding, 2025, Vol.15, No.1, 39-48 http://animalscipublisher.com/index.php/amb 44 domesticated around 10 000 to 40 000 years ago from the gray wolf (Pendleton et al., 2018). The close genetic relationship is seen in some of their behaviors, such as social organization and hunting behavior. Wolves are typically socially monogamous and possess extended parental care within packs, while domesticated dogs, specifically feral ones, possess more flexible social structure, including polygynandry (Natoli et al., 2021). Coyotes are typically solitary or possess smaller family units compared to the large wolf packs. 7.2 Influence of domestication on genetic and behavioral diversity Domestication has greatly affected the genetic and phenotypic variation of dogs when compared to wild canids. Selective breeding highlights the enormous diversity of morphologic features and breed-specific behavior of domestic house dogs, which result from human demand (Plassais et al., 2019). This process has also resulted in deep genetic alterations, for instance, alterations in genes that are involved in the development of neural crest, which contribute to behavior as well as physical features like tameness, small jaws, and floppy ears (Pendleton et al., 2018). Domestication has also influenced the reproductive behavior of dogs to enable them to have more promiscuous mating systems compared to wolves' monogamous systems (Natoli et al., 2021). Genetic diversity in domestic dogs is also contributed to by introgressive hybridization with wild canids, which can introduce adaptive characteristics but at the same time reduce genetic diversity and promote tameness (Pilot et al., 2021). 7.3 Evolutionary trade-offs in wild and domesticated canids Evolutionary trade-offs between free-ranging and domesticated canids are realized in their genetic and physiological adaptations. For instance, free-ranging canids like wolves and coyotes have adapted to ensure optimal survival in the environment. This includes the capacity to offer high levels of genetic diversity and adaptive traits for hunting and socialization (Figure 3) (Pilot et al., 2021; Zdjelar et al., 2021). By contrast, domestic dogs have been bred for traits beneficial in human-dominated environments, such as reduced aggression and increased sociability (Pendleton et al., 2018). This has also led to less lower genetic diversity and susceptibility to a variety of diseases (Wang et al., 2018). Also, domestic dogs have higher oxidative stress and lower antioxidant capacity compared to their wild canid counterparts, which may be the cause for their more limited lifespans (Jiménez and Downs, 2020). 8 Applications and Implications 8.1 Impacts on wildlife conservation strategies Canid behavioral genetics, particularly the canid domestic and wild hybridization, has numerous uses in wildlife conservation. Hybridization may lead to the introgression of domestic genes into the wild population, and this will influence the genetic diversity and adaptability of the wild population. For instance, introgressive hybridization among Eurasian wolves and domestic dogs has been known to introduce genes that have been recorded to provide adaptive advantages to free-ranging domestic dogs but, in wolves, introgression mainly results due to genetic drift owing to small population sizes caused by processes such as habitat destruction and hunting (Pilot et al., 2021). This highlights the importance of maintaining high levels of wild canid populations in large numbers to regulate introgression rates and maintain the genetic integrity of such animals. The incursion of wolf-dog hybrids into Indian savannah also highlights the importance of instituting improved monitoring and citizen-science collaborative approaches toward curbing the canker of hybridization (Tyagi et al., 2023). 8.2 Insights into domestic animal breeding programs Insight into the genetic foundation of morphology and behavior in canids can be of practical importance for breeding programs of domestic animals. The profound genetic diversity reported among domestic dog breeds, which has arisen due to selective pressure from humans, has produced the extensive variety of morphologic characteristics and breed-related behaviors. By charting areas under selection in the genome and variation influencing specific traits, breeders can make more informed decisions towards desirable traits and against unwanted traits. For example, GWAS have identified variants associated with body weight variation and explained a significant proportion of body size variation in dogs (Plassais et al., 2019). This kind of knowledge can be used to maximize breeding techniques, promoting domestic dogs' health and happiness.
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