Isesengura rya ADN nshya ryonyine rituruka mu bisigazwa bya kera by'imbwa byerekanaga ko byari byororerwa muri Siberiya hashize imyaka ibihumbi 23. Kuva aho, bakwira mu burengerazuba n'iburasirazuba, hamwe na ba shebuja baheze bambuka abazimizi bararohamye icyo gihe binjira muri Amerika. Ishusho nkiyi isobanura abanditsi b'Inyandiko Nshya Yatangajwe mu kinyamakuru cya PNAS.
Mubyukuri, imbwa zabaye inyamaswa za mbere zororerwa, ariko amakuru menshi yiyi nzira akomeza kuba amayobera. Genome yabo muri iki gihe yitiranyije iyo kugerageza gukurikirana inkomoko yabaturage ba mbere bo murugo bwerekana ko Ubushinwa no guha uburayi mumyaka ibihumbi 10 kugeza kumyaka ibihumbi 10, kandi abahanga bamwe ndetse bizera ko ibicumba byo murugo bibaye inshuro zirenze imwe.
Ikibazo nuko abahanga akenshi badashobora gutandukanya ibisigazwa byimbwa zikomeye ziva kumail, bakaba batari batandukanye cyane na anathice cyangwa rusange. Kubwibyo, abanditsi bashinzwe imirimo mishya bafatwa nk'ubwihindurize bw'imbwa mu mbaraga zibangikanye n'ubwihindurize nk'ubwo bw'abatuye muri Siberiya, Berigia na Amerika y'Amajyaruguru. Abahanga babonye ko amatsinda ya mbere y'abahigi b'imbwa yagaragaye mu mucyo mushya hashize imyaka ibihumbi 15, kandi abateganya mbere, kandi abateganya ko abateganya ko bakurikiranwa kugeza muri Siberiya, imyaka ibihumbi 22.8.
Wari igihe ntarengwa cyo gukurura ibintu byanyuma, mugihe uko byagaragaye ko byafashwe bidakwiye rwose ubuzima, ubukonje kandi bwumye. Nibisabwa bishobora guhatira abaturage b'impyisi kugirango twegere abantu gushaka amagufwa nubumwe, kandi bakorana nabo. Nyuma yigihe, ibi byatumye habaho umubano mwiza no guhinduka kw'inyamanswa mu nyamaswa nshya, zisanzwe zororerwa.
Kuva hano, gutura kwabo kwatangiye haba mu burengerazuba no mu burasirazuba, kugeza muri Amerika. David Metzer (David Metzer (David Metzer (David Mettor, (David Metzer, David Metnzin (David Metzer agira ati: "Twamenye kuva kera ko abantu ba mbere ku mugabane wa mbere bamaze kuba bafite ikoranabuhanga rikomeye ryo guhiga, umwe mu banditsi b'abisigazwa akazi. "Imbwa ziherekeje kubera ko isura nshya rwose ishobora kuba igice kimwe cyuyu muco, nkibikoresho byamabuye abantu bajyana nabo."
Inkomoko: Ubumenyi bwambaye ubusa