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      https://www.ias.ac.in/article/fulltext/jgen/100/0020

    • Keywords

       

      codon usage bias; genomic coding sequences; genetic divergence; Jatropha curcas

    • Abstract

       

      Jatropha curcas has recently emerged as an important bioenergy plant which is an ideal alternative for fossil fuels. It is particularly significant to analyse the codon usage bias (CUB) and further evaluate the intraspecific genetic divergence of three J. curcas in Asia, considering its potential economic benefits and various utilities. In the present study, the patterns of CUB were systematicallycompared, and the factors shaping CUB were identified in all three genomes of J. curcas. Our observations indicate that the preference for A/T nucleotides and A/T ending codons was present in all the three genomes. Moreover, 11 identical high-frequency codons as well as the optimal expression receptor Nicotiana tabacum were confirmed. Besides, it was observed that CUB resulted from the combined effects of natural selection and mutation pressure, while the natural selection was the determining factor. Eventually, similarity indices based onrelative synonymous codon usage (RSCU) values implied low intraspecific genetic divergence in three Asian J. curcas. This study provides useful clues for improving the expression level of exogenous genes and optimizing breeding programmes by molecular-assisted breeding in J. curcas.

    • Author Affiliations

       

      ZHANJUN WANG1 2 GUIYI WANG1 QIANWEN CAI1 YAO JIANG3 CHENCHEN WANG1 HAIMENG XIA4 ZIQI WU1 JIE LI1 ZULAN1 OU1 ZHONGDONG XU1 JISEN SHI2 JINHUI CHEN2

      1. College of Life Sciences, Hefei Normal University, Hefei 230601, People’s Republic of China
      2. Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, People’s Republic of China
      3. Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University, Wuhan 430070, People’s Republic of China
      4. School of Biosciences, University of Nottingham, Sutton Bonington LE12 5RD, UK
    • Dates

       
  • Journal of Genetics | News

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