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Articles by MIAO Yong-wang
Total Records ( 2 ) for MIAO Yong-wang
  HUO Jin-long , HUO Hai-long , MIAO Yong-wang , LI Fu-quan , LIU Li-xian , WU Ge-min , OUYANG Yi-na and QIAN Kun
  The Dahe pig is one of the representative indigenous pig breeds in the middle-altitude region of southwest China, and has played an important role in the local meat production for a long time. In order to estimate the genetic variability in its population, as well as provide the guidance and basis of genetic background for its conservation and further utilization, 76 microsatellite loci situated on swine’s 19 chromosomes were analyzed for 60 individuals sampled from their natural population by employing PCR and polyacrylamide gel electrophoresis. A total of 347 alleles were detected and all the loci were polymorphic. The number of alleles varied from 3 to 10, with a mean allele and effective allele number of 4.57 and 3.50 at each locus respectively. The mean heterozygosity and polymorphism information content of 76 microsatellite loci were 0.696 2±0.071 6 and 0.644 1±0.091 4, respectively. The results indicated that the genetic diversity of the Dahe pig was rich, and the Dahe pig has a good selection potential for breeding.
  YUAN Feng , MIAO Yong-Wang , LI Da-Lin , TANG Shou-Kun , XU Zheng , HUO Jin-Long and QI Hong
  The prolactin exerts obvious adjustment and control function for mammary gland development, lactation and milk protein gene expression in water buffalo. In this study the sequence features and polymorphisms of the exon 4 in prolactin gene were examined in 385 individuals which came from 12 river and swamp type buffalo populations using DNA direct sequencing and PCR-SSCP methods. The results showed that the sequence of exon 4 in prolactin gene was consists of 180 nucleotides, the fragment had high conservative character in different species. The e4. 109 C>T substitution was detected in nine swamp buffalo populations, and it was a silent mutation and was not associated with the traits of milk yield in buffalo. The PBA gene was the predominant gene in seven swamp type buffalo populations, while PBB gene was the dominant gene in Dehong and Fuzhong populations. The frequencies of PBA in swamp type buffalo was 0.400 − 0.917 and the average value was 0.629±0.049. The polymorphism wasn’t found in river buffalo, all the samples from river buffalo were holding nucleotides e4.109 C. The results indicate that there is distinct genetic differentiation between swamp and river type buffalo.
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