ORF2 gene fragment was amplified from Porcine circovirus type 2( PCV2) Shandong isolates by PCR,homology analysis and genotype identification were conducted on
To culture new breeds of Guizhou Heima goat,establishing open nucleus breeding system in farm was adopted to develop comprehensive selection index and establish
In order to analyze effects of domestication manner and age on reproduction of Lepus timidus,contrast test using large-cage and small-cage domestication manners