Manjun 1 ZHAI, Yifan XIE, Min YANG, Jian MU, ? Zongsheng 1 ZHAO

Investigation of the Relationships Between Wool Quality and Microsatellite in Hybrids of Australian Merino and Chinese Merino

This work was carried out to analyze of effects of twelve microsatellite loci and genetic heterozygosity on wool fineness and natural length, which are important indicators for evaluating of wool quality. 131 individuals from F2 and F3 generations of Australian Merino and Chinese Merino sheep (Xinjiang military reclamation type) mating were used as experimental subjects. Five loci on chromosome 1 and seven loci on chromosome 6 were determined as related with fineness and natural length of wool. The results showed that 3 loci significantly associated with wool fiber diameter (WFD), and 4 loci were significantly related to wool natural length (WNL). WFD increased by approximately 0.2%- 2.5%, and WNL decreased by 2%-10.93%, and also heterozygosity increased by 0.05 in the range of 0.5 to 1.0. These results could partially explain the molecular mechanism of heterosis for sheep wool quality. Provide theoretical support for the effective exploitation and utilization of this precious resource.

Avustralya Merinosu ve Çin Merinosu Hibritlerinde Yün Miktarı İle Mikrosatellit Arasındaki İlişkinin Araştırılması

Bu çalışma, yün kalitesini değerlendirmede önemli belirteçler olan yün inceliği ve doğal uzunluğu üzerine on iki mikrosatellit bölgenin ve genetik heterozigotluğun etkilerini incelemek amacıyla yapılmıştır. Avustralya Merinosu ve Çin Merinosu eşleşmesinden (Xinjiang askeri ıslah tipi) F2 ve F3 jenerasyonlarından 131 koyun deneysel materyal olarak kullanıldı. Kromozom 1’de beş bölge ve kromozom 6’da yedi bölge yün inceliği ve doğal uzunluğuyla ilişkili olarak belirlendi. Elde edilen sonuçlar 3 bölgenin anlamlı derecede yün teli çapı ile 4 bölgenin de anlamlı derecede yün doğal uzunluğu ile ilişkili olduğunu gösterdi. Yün teli çapı yaklaşık %0.2-%2.5 artarken ve yün doğal uzunluğu %2-%10.93 azaldı ve heterozigotluk 0.5 ile 1.0 aralığında 0.05 kadar arttı. Bu sonuçlar koyun yün kalitesinde heterozisin moleküler mekanizmasını kısmen açıklamaktadır. Çalışma ile bu değerli kaynağın etkili yayılımı ve kullanımı konusunda teorik destek sağlanmıştır.

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