大多数现代狗种,包括吉娃娃, 都有最近亲近的狼DNA, 这是一项新研究发现。 Most modern dog breeds, including chihuahuas, have recent wolf DNA from interbreeding, a new study finds.

一项新的研究表明,近三分之二的现代狗品种,包括吉娃娃在内,携带着可检测到的狼DNA,可能是过去几千年中相互交织的,而不是古代祖先的。 A new study reveals that nearly two-thirds of modern dog breeds, including chihuahuas, carry detectable wolf DNA, likely from interbreeding within the last few thousand years rather than ancient ancestry. 研究人员对数以千计的狗和狼基因组进行了分析,发现大多数品种中数量很少,在吉华华人中约占0.2%,而捷克斯洛伐克和萨尔卢人等狼的品种则高达40%。 Analyzing thousands of dog and wolf genomes, researchers found small amounts in most breeds—around 0.2% in chihuahuas—while wolfdogs like Czechoslovakian and Saarloos breeds have up to 40%. 一些猎犬和视猎犬也表现出显著的水准，但圣伯纳犬没有。 Some hounds and sight hounds also show notable levels, but Saint Bernards had none. 科学家们认为,乡村狗可能便利了基因流动,特别是因为生境的丧失使狼群与流浪狗接触。 Scientists suggest village dogs may have facilitated gene flow, especially as habitat loss brought wolves into contact with stray dogs. 狼的DNA可能会影响独立、怀疑陌生人、领土行为等特征, Wolf DNA may influence traits like independence, suspicion of strangers, and territorial behavior, though breed traits don’t predict individual behavior. 调查结果发表在PNAS上,突出了野狼与家畜之间持续的遗传联系。 The findings, published in PNAS, highlight ongoing genetic ties between wild wolves and domestic dogs.