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《Chinese Journal of Animal and Veterinary Sciences》 1989-01
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SILVER STAINING NUCLEOLUS ORGANIZER REGINE ( AG-NOR ) AND EVOLUTIONARY RELATIONSHIPS IN THE BREEDS OF DOMESTIC PIGS

Zhan Tiesheng, Yuan Zifa, Liu Wansheng ( Northwestern University of Agriculture )  
It was found that Ag-NOR was a very helpful mark of cytogenetics to understand the evolution of domestic pigs. Phenotype of Ag-NOR was stable and very sensitive to show the minute variations between the breeds of the domestic pigs. In the present paper, the date of Ag-NOR for 14 breeds of domestic pigs and European wild pig ( S. scrofa L. ) were collected, and analysed using bio-mathematics methods, such as X2 test and estimating the genetic distance. Using Ag-NOR charicters as the mark, the breeds of pigs could be distinguished and classified, also the relationship of them could be revealed well.
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