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Expression of resistance against powdery mildew (Blumeria graminis f.sp. tritici) in bread wheat (Triticum aestivum)

Indian Agricultural Research Journals

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Title Expression of resistance against powdery mildew (Blumeria graminis f.sp. tritici) in bread wheat (Triticum aestivum)
 
Creator AHMADI, H
ESMAEILI, A
GOODARZI, D
 
Subject Blumeria graminis; Expression; Powdery mildew; Triticum dicoccoides
 
Description Blumeria graminis f.sp. tritici (Bgt) causes an important disease of wheat, the powdery mildew to which accessions TA1055 and TA1150 of Triticum turgidum L. ssp dicoccoides (T. dicoccoides) were resistant. These carry MlTd1055 gene for resistance to Bgt. The F₁ hybrid plants obtained from crosses between ‘Chinese Spring (CS) ’ and T. dicoccoides were sterile or partially sterile. Overall, the mean number of BC₁ seed set was 1.43 seed/spike. Selfed seeds were harvested from 78 BC₁ plants grown to maturity. The levels of fertility were, 33.6% with TA1055 and 26.4% with TA1150. The chromosome numbers of the selfed seed from BC₁ plants ranged from 27 - 44. Fifty eight per cent of their BC₁ progeny had chromosome numbers between 40 and 42. The segregating of BC₁ plants fit a 1:1 ratio and BC₁F₂ fit a 3:1 ratio for resistance to susceptibility supporting further the hypothesis of one dominant gene for resistance. Based on screening of two BC₁F₂ lines carrying powdery mildew resistance derived from TA1055 and TA1150, it appeared that a new gene (MlTd1055) for powdery mildew resistance has been transferred to bread wheat Triticum aestivum. Bread wheat carrying this gene gave intermediate reaction types when inoculated with the tested mixed population of Bgt, while the T. dicoccoides parents were highly resistant to the mixed population of isolates.
 
Publisher The Indian Journal of Agricultural Sciences
 
Contributor —
 
Date 2011-08-03
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/8409
 
Source The Indian Journal of Agricultural Sciences; Vol 81, No 8 (2011)
0019-5022
 
Language eng
 
Relation http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/8409/3389
 
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