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Quantitative trait loci in bread wheat (Triticum aestivum L.) associated with resistance to stripe rust

Author: Badakhshan, H.
Author: Mohammadi, S.A.
Author: Zad, S.A.
Author: Moghaddam, M.
Author: Jalal-Kamali, M.R.
Author: Khodarahmi, M.
Year: 2008
Abstract: Stripe rust is an important wheat disease worldwide and resistance to stripe rust is often not controlled by race-specific resistance genes. To identify quantitative trait loci (QTL) affecting quantitative resistance to stripe rust, 329 F2:3 families from a cross between highly resistant winter type cv. MV17 and highly susceptible spring type local cv. Bolani were used. The population was evaluated for adult plant resistance to pathotype 134E134A+ of Puccinia striiformis, in the field condition and area under the disease progress curve (AUDPC) was calculated. Fifty six polymorphic SSR markers between parental genotypes were screened in the population and linkage map was constructed using these markers. Based on composite interval mapping (CIM) 14 regions on nine (4A, 1B, 2B, 3B, 4B, 5B, 6B, 2D and 7D) out of the 21 wheat chromosomes were significantly associated with AUDPC. The effect of QTLs varied from 0.01 to 8.00% giving an aggregate effect of 34.3% for AUDPC. Leaf tip necrosis (LTN) was also recorded as presence and absence and the phenotype was used as a dominant Mendelian morphologic marker. Linkage analysis revealed association between LTN and Xbarc352 SSR marker on chromosome 7D.
Language: English
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Type: Article
Region: Global
Pages: 901-906
Journal issue: 4
Journal: Biotechnology and Biotechnological Equipment
Journal volume: 22
Keywords: AUDPC
Keywords: Composite interval mapping
Keywords: Leaf tip necrosis
Keywords: Stripe rust
Keywords: SSR markers

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  • Wheat
    Wheat - breeding, phytopathology, physiology, quality, biotech

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