Query (optional)   in Class  All Allele Author Colleague Collection Assembly Gene Gene Class Gene Product Germplasm Image Journal Keyword Library Locus Map Map Data Marker Pathology Polymorphism Probe Protein QTL Rearrangement Reference Sequence Species Trait Trait Study Two Point Data  

---

GrainGenes Reference Report: SBB-26-719

[Submit comment/correction]

Reference	SBB-26-719
Title	Resistance to Gaeumannomyces graminis in wheat genotypes grown in field environments and sand culture
Journal	Soil Biology and Biochemistry
Year	1994
Volume	26
Pages	719-726
Author	Penrose L Neate S
Abstract	Evidence of resistance to the root pathogen Gaeumannomyces graminis was sought by correlating measurements of disease in wheat grown in sand culture and field environments Three sets of wheat were studied, one set of seven cultivars previously thought to differ in resistance, and two sets that had segregated from two crosses, AUS1080 X cv Condor and Temu89-72 X cv Bayonet Seedlings grown in sand culture were inoculated with infected agar disks, and disease was assessed from symptoms of colonization Incidences of infected roots and of 'deadheads' (wheat heads prematurely dead and empty of grain), and measures of plant growth, were recorded for sets of wheat at three field sites naturally infested with the pathogen. At least two characters detected in sand culture were correlated with root disease in the field, browning of root cortical tissue, and more general susceptibility to colonization. Grain weight was recorded at only two sites, and was positively correlated with cortical browning in sand culture at one, but not at the other site where progressive drought influenced grainfill more strongly than did disease. Other correlations were detected, but these were not directly indicative of resistance. Root colonization in sand culture, and both length of the subcoronal internode and number of tillers in field-grown plants, were correlated (in a complex manner) for both sets of segregate families. Many of the correlations that indicated resistance, and those that appeared not to have a pathogenic origin, were significantly affected by the maturity of wheat genotypes. Further work is required to evaluate characters indicative of resistance that were detected in this study.
Keyword	correlation [ Show all 14 ]

GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.