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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jbsc/030/05/0595-0598

    • Keywords

       

      Beijing Holstein cows; growth hormone gene; genetic polymorphism; milk production traits

    • Abstract

       

      Associations were analysed between polymorphisms of the growth hormone gene (GH-MspI) (localized in intron 3) and milk production traits of Beijing Holstein cows (a total of 543 cows). Polymerase chain reaction (PCR)-restriction fragment length polymorphism (RFLP) method was used for identification of various geno-types. Frequencies of genotypes were 0.77, 0,21 and 0.02 for A/A, A/B and B/B, respectively. The frequency of theGHA allele is 0.875.

      The results of the least squares means show that in all three lactations, theGH A/A cows yielded more milk (P < 0.01 for lactation I andP 0.05 for lactations II and III), whereas A/B cows showed higher milk fat content than A/A individuals (P < 0.05 for lactations I and II, andP < 0.01 for lactation III). The A/A cows yielded more fat than A/B individuals (P < 0.01 only in lactation I). The A/A cows yielded more milk protein than A/B individuals (P < 0.01 for lactations I, II, and III). The A/A cows produced milk of higher protein content than of A/B individuals (P < 0.05 only in lactation II).

    • Author Affiliations

       

      Guo Li Zhou1 Hai Guo Jin1 2 Chen Liu1 2 Shan Li Guo1 Qi Zhu1 Yu Hou Wu1

      1. College of Life Science, Liaocheng University, Liaocheng, Shandong - 252059, People’s Republic of China
      2. Branch of Animal Husbandry Jilin Academy of Agricultural Sciences, Gongzhuling, Jilin - 136100, People’s Republic of China

    • Dates

       
      Published
      December 2005
      Manuscript received
      29 March 2005
      Accepted
      6 September 2005

  • Journal of Biosciences | News

      Forthcoming Special issue.


    • To trigger further research on plant mitochondria, the Journal of Biosciences is bringing out a special issue titled "Plant Mitochondria: Properties and Interactions with Other Organelles".


      Plant mitochondria are quite distinct and have unique features, such as a cyanide-insensitive alternate pathway. They also interact with chloroplasts to optimize photosynthetic carbon assimilation.


      Submissions are welcome until 30 July 2023. The contributions can be original articles, short communications, reviews, or mini-reviews on any topic related to plant mitochondria.


      Authors can submit their articles online at https://www.editorialmanager.com/jbsc/default2.aspx

      Posted on April 12, 2023
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