Research Article Open Access

The Evolution Force of Genome Reduction in Carnivorous Plants

Ming-Yue Ma1, Tao Tan2, Xin-Xin Yin1, Jia-Ling Zou1 and Kun-Xian Shu1
  • 1 Chongqing University of Posts and Telecommunications, China
  • 2 Chongqing Medical University, China

Abstract

The introns are widely present in the genome of eukaryotes and the distribution of intron varies greatly among different organisms or different genes. Generally, introns loss is an important way for uneven distribution of intron during genome evolution. In this study, two closely related carnivorous plants (Genlisea aurea and Utricularia gibba) were chosen, their genome were relatively integrity and high quality, especially, the large difference in genome size between them. We detected intron loss events, then investigated the relationship between the genome size, intron density, intron loss and the mutation rate in the carnivorous plants. Finally, a total of 752 and 124 intron loss positions were identified in G. aurea and U. gibba, respectively. In carnivorous plants, we found that the region around lost site had high mutation rate, the genes of intron loss had high mutation rate. Besides, for the species with more intron losses, the genome size was smaller and the mutation rate was higher. Thus, we propose that the mutation rate was positively correlated with intron losses, but negatively correlated with intron number and genome size. These could be explained by the selection to minimize mutational hazards.

American Journal of Biochemistry and Biotechnology
Volume 14 No. 2, 2018, 154-161

DOI: https://doi.org/10.3844/ajbbsp.2018.154.161

Submitted On: 25 April 2018 Published On: 26 May 2018

How to Cite: Ma, M., Tan, T., Yin, X., Zou, J. & Shu, K. (2018). The Evolution Force of Genome Reduction in Carnivorous Plants. American Journal of Biochemistry and Biotechnology, 14(2), 154-161. https://doi.org/10.3844/ajbbsp.2018.154.161

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Keywords

  • Genome Size
  • Intron Loss
  • Mutational-Hazard Hypothesis
  • Genlisea aurea
  • Utricularia gibba