GrainGenes Reference Report: CRS-33-439
Reference
CRS-33-439
Title
Inheritance of septoria glume blotch resistance in wheat
Journal
Crop Science
Year
1993
Volume
33
Pages
439-443
Author
Bostwick D Ohm H Shaner G
Abstract
Incorporation of resistance to septoria glume blotch, caused by Stagonospora nodorum (Berk.) Castellani & E.G Germano, into wheat (Triticum aestivum L.) is complex because resistance is quantitatively inherited The Brazilian wheat 'Cotipora' expresses a high level of resistance to this pathogen. Crosses were made between Cotipora and the susceptible Purdue line, P831791A1-1-6. Populations of parents, F1, F2, BCF1, and BCF2 were inoculated with a conidial suspension of the pathogen containing 2.5 X 10(6) spores mL-1 and given a moist period of 52 h. Percentage of diseased tissue was estimated on the spikes and gag leaves four times over a 20-d period, and an area under disease progress curve (AUDPC) was calculated. Correlations between AUDPCs of spike and flag leaf in the and BCF1 populations were 0.312 and 0.293, respectively, indicating that resistance is at least partially controlled by different genes in these two plant organs. Resistance was partially dominant in the F1 generation in both the spike and flag leaf. In the F2, BCF1, and BCF2 generations, however, dominant gene action was not evident. The gene number estimate for the spike reaction was 3.16. Broad sense heritability estimates were 0.51 and 0.34 for the spike and flag leaf reactions to S. nodorum, respectively. Cotipora is a valuable source of S. nodurum resistance because of its high level of resistance expressed in the spike and flag leaves.
Keyword
disease resistance
[ Show all 11 ]
GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.
GrainGenes Reference Report: CRS-33-439
|
| ||||
|
| ||||
|
| ||||
|
| ||||
|
| ||||
|
| ||||
|
| ||||
|
| ||||
|
|
GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||