Akatswiri a sayansi ya zamoyo ku Japan apeza kuti agalu akhala “bwenzi lapamtima la munthu” chifukwa cha jini yomwe imachepetsa kupsinjika maganizo, analemba motero “Scientific Reports”.
Malinga ndi omwe adalemba kafukufukuyu kuchokera ku yunivesite ya Azabu, jini yomwe ikufunsidwayo yapangitsa agalu akale kukhala odekha m'malo a anthu. Izi, zapangitsa kuti ubale wapadera pakati pawo ukhalepo pakapita nthawi.
Chimodzi mwa ziweto zomwe zimakonda kwambiri padziko lapansi zimachokera ku nkhandwe. Komabe, kwa zaka zambiri akatswiri okhulupirira za chisinthiko akhala akuzunguza mutu wa galuyo.
Asayansi aku Japan amakhulupirira kuti athetsa chinsinsi. Agalu amaoneka kuti ali ndi masinthidwe awiri mu jini yotchedwa MC2R (melanocortin 2 receptor). Zimapanga hormone cortisol - alamu yopangidwa mwachilengedwe yomwe imatulutsidwa pamene wina akukumana ndi mantha kapena nkhawa.
"Zomwe anapezazi zikusonyeza kuti jini ya MC2R inathandiza kuti agalu aziweta, mwina polimbikitsa kuchepetsa kupsinjika maganizo kwa anthu," anatero Dr. Miho Nagasawa wa gulu lofufuza.
Mwambi wotchulidwa kuti bwenzi lapamtima la munthu woyamba anali nkhandwe yotuwa imene inakumana ndi mabwenzi ake oyambirira aumunthu pafupifupi zaka 33,000 zapitazo, kwinakwake ku Southeast Asia. Pafupifupi zaka 15,000 zapitazo, kagulu kakang'ono ka agalu oweta anayamba kusamukira ku Middle East ndi Africa.
Mitunduyi, yotchedwa Canis lupus familiaris, inafika ku Ulaya pafupifupi zaka 10,000 zapitazo. Anthu anayamba kumanga minda ndi midzi yokhala ndi makoma otetezera, zomwe zimasonyeza chiyambi cha chitukuko chamakono. Agalu alipo kale kuti athandize kulondera, kudyetsa ng'ombe zoyamba ndi maulendo oyendayenda. Malingana ndi kafukufukuyu, ndondomeko za ulendo waukuluwu zimalembedwa mu DNA yawo.
