Genome sequence data of the strongly antagonistic yeast Pichia kluyveri isolate APC 11.10 B as a foundation for analysing biocontrol mechanisms

Abstract

Pichia kluyveri strain APC 11.10 B was isolated from apple bark in Switzerland and exhibited strong antagonistic activity against plant pathogenic fungi in vitro (e.g., Botrytis, Fusarium or Monilinia isolates). In order to identify the mechanisms underlying this antagonism, we have sequenced the genome of this isolate by long- and short-read sequencing technologies. The sequence data were de novo assembled into nine scaffolds and a fully resolved circularized mitogenome. The total genome size was 10.9 Mbp and 7451 potential open reading frames (ORFs) and 202 tRNA genes were predicted. In comparison to two P. kluyveri genomes deposited at the NCBI (of strains X31-10 and CBA6002), the APC 11.10 B strain seemed to represent a hybrid because backmapping of sequencing reads resulted in a high rate of heterozygous and structural variants in the nuclear genome (this was not observed for the mitochondrial genome). The P. kluyveri (APC 11.10 B) draft genome represents a first step and resource for genome mining, comparative and functional genomics (e.g., identifying the biocontrol mode of action), and evolutionary studies. Since the genus Pichia comprises many biotechnologically relevant yeasts, the genome data may be used in a variety of fields and disciplines.

Keywords

• Antagonism
• Biocontrol
• Genome assembly and annotation
• Mechanism
• Plant protection
• Yeast