Population parameters for resistance to Fusarium graminearum and Fusarium verticillioides ear rot among large sets of early, mid-late and late maturing European maize (Zea mays L.) inbred lines

Abstract Infection of maize ears with Fusarium graminearum (FG) and Fusarium verticillioides (FV) reduces yield and quality by mycotoxin contamination. Breeding and growing varieties resistant to both Fusarium spp. is the best alternative to minimize problems. The objectives of our study were to draw conclusions on breeding for ear rot resistance by estimating variance components, heritabilities and correlations between resistances to FV and FG severity and to investigate different inoculation methods. In 2007 and 2008, three maturity groups (early, mid-late, late) each comprising about 150 inbred lines were tested in Germany, France, Italy, and Hungary according to their maturity group. They were silk channel inoculated by FG (early) and FV (all groups). In the late maturity group, additionally kernel inoculation was applied in a separate trial. The percentage of mycelium coverage on the ear was rated at harvest (0–100%). Significant (P < 0.01) genotypic variances of ear rot severity were found in all groups. Inoculation was superior to natural infection because of higher disease severities and heritabilities. In early maturing flints and dents, FG caused significantly (P < 0.01) higher ear rot severity than FV (61.7 and 55.1% FG vs. 18.2 and 11.1% FV ear rot severity, respectively). FV inoculation in Southern Europe (mid-late, late) resulted in similar means between 10.3 and 14.0%. Selection is complicated by significant (P < 0.01) genotype × environment interactions. Correlation between FG and FV severity was moderate in flints and dents (r = 0.59 and 0.49, respectively) but lines resistant to both fungi exist. We conclude that chances for selecting improved European elite maize material within the existing germplasms is promising by multi-environmental inoculation trials..

Medienart:

E-Artikel

Erscheinungsjahr:

2009

Erschienen:

2009

Enthalten in:

Zur Gesamtaufnahme - volume:120

Enthalten in:

Theoretical and applied genetics - 120(2009), 5 vom: 25. Dez., Seite 1053-1062

Sprache:

Englisch

Beteiligte Personen:

Löffler, Martin [VerfasserIn]
Kessel, Bettina [VerfasserIn]
Ouzunova, Milena [VerfasserIn]
Miedaner, Thomas [VerfasserIn]

Links:

Volltext [lizenzpflichtig]

BKL:

48.58$jPflanzenzüchtung

Themen:

Artificial Inoculation
Flint
Fusarium
Fusarium Graminearum
Maturity Group

RVK:

RVK Klassifikation

Anmerkungen:

© Springer-Verlag 2009

doi:

10.1007/s00122-009-1233-9

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

OLC2096659140

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