Fusarium species and chemotypes associated with fusarium head blight and fusarium root rot on wheat in Sardinia

• DOI: 10.1111/ppa.12337
• Publication Date: 2014-12-09T18:12:32Z
• Authors: V. Balmas; B. Scherm; A. Marcello; M. Beyer; L. Hoffmann; Q. Migheli; M. Pasquali
• Keywords: Chemotype; Fusarium culmorum; Root rot

Environmental conditions in Sardinia (Tyrrhenian Islands) are conducive to fusarium root rot ( FRR ) and head blight FHB ). A monitoring survey on wheat was carried out from 2001 2013, investigating relations among these diseases their causal agents. more frequently encountered the most recent years while constantly present throughout monitored period. By assessing population composition of agents as well genetic chemotypes EF ‐1α polymorphisms, study examined whether two could be differentially associated a species or population. Fusarium culmorum caused both were detected at different abundances (88% 3‐ ADON , 12% NIV graminearum (15‐ chemotype) appeared only recently (2013) few areas agent . In F haplotypes identified based an SNP mutation located 34 bp after first exon partial sequence (60% adenine, 40% thymine); populations did not segregate with chemotype but A‐haplotype significantly Sardinian data set P = 0·001), suggesting possible fitness advantage establishment that neither dependent sampling location nor year. The determining haplotype is distributed worldwide. question segregates characters facilitating will require further validation specifically sampled international set.