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Race-specificity of temperature-sensitive genes for resistance toPuccinia striiformisinTriticum dicoccoides

✍ Scribed by Z. K. Gerechter-Amitai; C. H. Silfhout

Book ID: 104617474
Publisher: Springer
Year: 1989
Tongue: English
Weight: 505 KB
Volume: 43
Category: Article
ISSN: 0014-2336
DOI: 10.1007/bf00037890

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✦ Synopsis

Twenty-four entries of wild emmer possessing temperature-sensitive genes for resistance to yellow rust were studied in the seedling stage, at two temperature-profiles, with 15 pathogenic races from 11 countries in South America, Africa, Asia and Europe . It was shown that the majority of the resistance genes in these wild emmer entries were race-specific . In most of these entries a more resistant reaction was displayed at the higher temperature-profile ; however in three entries a shift in reaction towards resistance was observed with certain races but towards susceptibility with some of the other races, suggesting that two different kinds of temperature-sensitive genes were involved in each of these entries . The similarity of temperature-sensitive genes occurring in wild emmer and in cultivated wheat is discussed .

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