Mary Allen
Kyakkyawar idanuwan Husky blue suna daukar ido. Wasu nau'ikan karnuka ne kawai, irin su Makiyayi na Australiya da Collie, suma suna iya samun idanu shuɗi. Dangane da Siberian Huskies, masu bincike yanzu sun tantance abin da launin su yakan kai ga. Bisa ga wannan, akwai dangantaka ta kut-da-kut tare da kwafin wani yanki na musamman akan chromosome 18. An rarraba kwayoyin halittar karnuka akan jimillar chromosomes 78, 46 a cikin mutane da 38 a cikin kuliyoyi.
Bambance-bambancen kwayoyin halitta, irin su abin da ake kira merle factor wanda ke haifar da idanu masu launin shuɗi a cikin wasu nau'in kare, an riga an san su, amma ba sa taka rawa a cikin Siberian Huskies. Tawagar karkashin jagorancin Adam Boyko da Aaron Sams na Embark Veterinary a Boston, Massachusetts, masu samar da gwajin DNA na kare, yanzu sun hada da karnuka fiye da 6,000 masu launin ido daban-daban a cikin nazarin kwayoyin halitta.
Yankin da aka ninka sau biyu na chromosome yana kusa da kwayoyin ALX4, wanda ke taka muhimmiyar rawa wajen bunkasa idanu a cikin dabbobi masu shayarwa, masu bincike sun ruwaito a cikin mujallar PLOS Genetics. Duk da haka, ba duk Huskies da ke da bambance-bambancen jinsin suna da idanu shuɗi ba, don haka dole ne sauran abubuwan da ba a san su ba a baya ko abubuwan muhalli dole su taka rawa. Sau da yawa dabba tana da ido ɗaya launin ruwan kasa, ɗayan kuma shuɗi.