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Resistance to stripe rust in Triticum turgidum, T. tauschii and their synthetic hexaploids

By: Contributor(s): Material type: ArticleArticleLanguage: En Publication details: 1995ISSN:
  • 1573-5060 (Revista en electrónico)
Subject(s): Online resources: In: Euphytica v. 82, no. 2, p. 117-124649379Summary: Resistance to stripe rust (Puccinia striiformis) in 34 Triticum turgidum var. durum [T. durum], 278 T. tauschii [Aegilops squarrosa] and 267 synthetic hexaploid wheats (T. turgidum x T. tauschii) was evaluated at the seedling stage in the greenhouse and at the adult-plant stage at 2 field locations. Mexican pathotype 14E14 was used in all studies. Seedling resistance, expressed as low infection type, was present in all 3 species. Some 128 (46%) accessions of T. tauschii, 8 (23%) of T. turgidum and 21 (12%) of synthetic hexaploid wheats were highly resistant as seedlings. In the field tests, resistance was evaluated by estimating area under disease progress curve (AUDPC). Synthetic hexaploid wheats showed a wide range of variability for disease response in both greenhouse and field tests, indicating the presence of a number of genes for resistance. In general, genotypes with seedling resistance proved to be resistant as adult plants. Genotypes which were susceptible or intermediate as seedlings but resistant as adult plants were present in both T. turgidum and the synthetic hexaploids. Resistance from either T. turgidum or T. tauschii or both were identified in the synthetic hexaploids
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Peer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0014-2336

Resistance to stripe rust (Puccinia striiformis) in 34 Triticum turgidum var. durum [T. durum], 278 T. tauschii [Aegilops squarrosa] and 267 synthetic hexaploid wheats (T. turgidum x T. tauschii) was evaluated at the seedling stage in the greenhouse and at the adult-plant stage at 2 field locations. Mexican pathotype 14E14 was used in all studies. Seedling resistance, expressed as low infection type, was present in all 3 species. Some 128 (46%) accessions of T. tauschii, 8 (23%) of T. turgidum and 21 (12%) of synthetic hexaploid wheats were highly resistant as seedlings. In the field tests, resistance was evaluated by estimating area under disease progress curve (AUDPC). Synthetic hexaploid wheats showed a wide range of variability for disease response in both greenhouse and field tests, indicating the presence of a number of genes for resistance. In general, genotypes with seedling resistance proved to be resistant as adult plants. Genotypes which were susceptible or intermediate as seedlings but resistant as adult plants were present in both T. turgidum and the synthetic hexaploids. Resistance from either T. turgidum or T. tauschii or both were identified in the synthetic hexaploids

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