Acta Agriculturae Zhejiangensis ›› 2022, Vol. 34 ›› Issue (7): 1439-1448.DOI: 10.3969/j.issn.1004-1524.2022.07.11

• Horticultural Science • Previous Articles     Next Articles

Codon usage bias and its influencing factors in the whole genome of three truffles

HAN Lihong(), TIAN Xuelian, LIU Chao(), FU Xiaolin, WANG Yuanxian   

  1. Yunnan Engineering Research Center of Fruit Wine, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing 655011, Yunnan, China
  • Received:2021-12-21 Online:2022-07-25 Published:2022-07-26
  • Contact: LIU Chao

Abstract:

Truffle is a rare wild macrofungi for both medicine and food, it has high value in nutrition and health care. Codon bias analysis can provide a theoretical basis for genetic evolution and resource development of truffles. Based on the genomic data of Tuber melanosporum, T. magnatum and T. borchii, CodonW 1.4 2, Mega X software, and EMBOSS online website were used to systematically analyze the codon usage bias and influencing factors of the genomes of three truffles. The results showed that the codon usage patterns of the three truffles were highly similar, with a tendency to use the guanine or cytosine ending codons, and the effective number of codons showed high values. Among them, the similarity of codon usage between T. melanosporum and T. borchii was the highest. The guanine or cytosine (G/C) base related parameters of T. magnatum were higher than other two species. Among the optimal codons of the three truffles, the G/C ending codons accounted for 81.8%, 78.9% and 61.9% respectively. 24 high-frequency codons and 14 optimal codons were common in the three truffles. All of them prefer the guanine or cytosine or thymineas ending codons, but the preference was not strong as a whole. The results of Parity Rule 2 plot, ENC-plot, neutrality plot and correspondence analysis showed that the formation of codon bias of the three truffles were mainly affected by multiple factors such as selection pressure. Among them, T. melanosporum was mainly affected by translational selection pressure, and T. magnatum was mainly affected by other factors other than translational selection, and T. borchii was relatively less affected by selection pressure. The results showed that the codon use patterns of the three truffles were similar, and the codon usage bias was weak with low expression potential. The codon bias was mainly affected by multiple factors. The results provided a theoretical basis for species evolution and genetic breeding of truffles.

Key words: truffle, genome, codon usage bias, optimal codon, selection pressure

CLC Number: