ISSN:
1615-6110
Keywords:
Angiosperms
;
Poaceae
;
Triticum dicoccoides
;
Uredinales
;
Puccinia striiformis
;
Wild emmer
;
pathogene resistances
;
ecology
;
allozyme genotypes
;
statistic analyses
;
Flora of Israel
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract From 114 accessions of wild emmer wheat from 11 sites in Israel, known for their allozymic variation (Nevo & al. 1982), individual genotypes were tested for resistance to one isolate of stripe rust both in the seedling stage in a growth chamber and in the adult plant stage in the field. The results indicate that resistance to stripe rust in seedlings and adults are significantly correlated (rs = 0.40, p 〈 0.001). Genetic polymorphisms of resistance to stripe rust vary geographically and are predictable by climatic, as well as allozymic markers. Three variable combinations of rainfall, evaporation, and temperature explain significantly 0.40–0.53 of the spatial variance in disease resistance to stripe rust, suggesting the operation of natural selection. Several allozyme genotypes are significantly associated with disease resistance. We conclude that natural populations of wild emmer wheat in Israel contain large amounts of disease resistance genes. These populations could be effectively screened and then utilized by the phytopathologist for identifying resistant genotypes and producing new resistant cultivars.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00989414
