Sources of resistance to Fusari-um head blight in VIR oat col-lection

Игорь Градиславович Лоскутов, Татьяна Гагкаева, Ольга Гаврилова, T. Yli-Mattila

Research output: Contribution to journalArticlepeer-review

Abstract

Fusarium head blight (FBH) is a serious
disease of cultivated oats (Avena sativa L.). The
objective of this study was to screen a set of oat
genotypes from the VIR Avena sativa germplasm
collection for the FHB resistance. Of the 155 screened
genotypes 42 % belonged to both hulled and naked
cultivars, 55 % were landraces and the rest were
breeding lines. Screening nurseries were planted at
two locations: in the Northwestern Russia in
2007–2008 with artificial inoculation by F. sporotri chioides strains and in the Russian Far East in 2009
(natural infections). The resistance data were based on
three different parameters: (a) percentage of grain
showing evidence of Fusarium damage, (b) the DNA
content of the trichothecene-producing Fusarium
species and (c) the trichothecene mycotoxin
accumulation; the sum of which permitted identification of genotypes with multicomponent resistance to
FHB. The highest degrees of resistance were observed
in the naked cvs. Iymay (k-11014, China) and Numbat
(k-14851, Australia) and by the hulled cv. Kuromi (r11632, Japan). The most resistant landraces were the
hulled oats originating from the Asian region (k-2513,
k-6963, k-7766, and k-8479). Considerable similarity
was observed between the resistance reactions of oat
genotypes to the Fusarium disease under different
environmental conditions. The identified resistant
accessions may serve as crossing partners in oat
breeding efforts
Original languageEnglish
Pages (from-to)355-364
Number of pages10
JournalEuphytica
Volume191
Issue number3
StatePublished - 2013

Cite this