論文

査読有り 最終著者 国際誌
2020年8月

Root-knot nematode genetic diversity associated with host compatibility to sweetpotato cultivars.

Molecular plant pathology
  • Erika Asamizu
  • ,
  • Kenta Shirasawa
  • ,
  • Hideki Hirakawa
  • ,
  • Hideaki Iwahori

21
8
開始ページ
1088
終了ページ
1098
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1111/mpp.12961

Plant parasitic root-knot nematodes (RKN) such as Meloidogyne incognita cause significant crop losses worldwide. Although RKN are polyphagous, with wide host ranges, races with differing host compatibilities have evolved. Associations between genotype and infection phenotype in M. incognita have not yet been discovered. In this study, 48 M. incognita isolates were collected from geographically diverse fields in Japan and their genomes sequenced. The isolates exhibited various infection compatibilities to five sweetpotato (SP) cultivars and were assigned to SP races. Genome-wide association analysis identified 743 SNPs affecting gene coding sequences, a large number of which (575) were located on a single 1 Mb region. To examine how this polymorphic region evolved, nucleotide diversity (Pi) was scanned at the whole genome scale. The SNP-rich 1 Mb region exhibited high Pi values and was clearly associated with the SP races. SP1 and 2 races showed high Pi values in this region whereas the Pi values of SP3, 4, and 6 were low. Principal component analysis of isolates from this study and globally collected isolates showed selective divergence in this 1 Mb region. Our results suggest for the first time that the host could be a key determining factor stimulating the genomic divergence of M. incognita.

リンク情報
DOI
https://doi.org/10.1111/mpp.12961
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/32558191
PubMed Central
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7368124

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