Theoretical and Applied Genetics

, Volume 100, Issue 1, pp 1–8

Inheritance of resistance to Fusarium graminearum in wheat

  • G. -H. Bai
  • G. Shaner
  • H. Ohm
Original Article

DOI: 10.1007/PL00002902

Cite this article as:
Bai, GH., Shaner, G. & Ohm, H. Theor Appl Genet (2000) 100: 1. doi:10.1007/PL00002902

Abstract 

To study the inheritance of resistance in wheat to Fusarium graminearum, six resistant cultivars from China were crossed to two susceptible cultivars. The parents and their progenies were evaluated in the greenhouse for resistance to the spread of scab within a spike. A central floret was inoculated by injecting a droplet of inoculum at the time of anthesis. Inoculated plants were kept in a moist chamber for three subsequent nights. The proportion of scabbed spikelets was recorded six-times from 3-days to 21-days after inoculation, and the area under the disease progress curve (AUDPC) was calculated from these proportions. One to three genes, depending on the cultivar, conditioned resistance to scab as reflected by the AUDPC. A simple additive-dominance effect model fitted the segregation data for 8 of the 11 crosses. Dominance and epistatic effects were significant in a few crosses. These effects increased resistance in some crosses but decreased resistance in others. However, relative to additive effects, dominant and epistatic effects accounted for only a small portion of the genetic effects in the populations evaluated. The importance of additive effects means that it should be possible to accumulate different genes to enhance resistance to scab in wheat.

Key words Fusarium head blightPartial resistanceQuantitative resistance

Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • G. -H. Bai
    • 1
  • G. Shaner
    • 2
  • H. Ohm
    • 3
  1. 1.Mycotoxin Research Unit, National Center for Agricultural Utilization Research, USDA/ARS, 1815 North University Street, Peoria, IL 61604, USA e-mail: baig@mail.ncaur.usda.govUS
  2. 2.Department of Botany and Plant Pathology, Lilly Hall, Purdue University, West Lafayette, IN 47907, USAUS
  3. 3.Department of Agronomy, Lilly Hall, Purdue University, West Lafayette, IN 47907, USA Indiana Experiment Station Journal Number 16004US