Genotyping <i>Cephalosporium gramineum</i> and development of a marker for molecular diagnosis

Baaj, Dunia Wafai; Kondo, Norio

doi:10.1111/j.1365-3059.2011.02429.x

Cited by 6 publications

(1 citation statement)

References 27 publications

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“…Because the pathogen has no known sexual stage, it is likely to be highly clonal with a limited spectrum of genetic variation within each lineage (Anderson & Kohn, ). A recent study of restriction fragment length polymorphism (RFLP) analysis of ribosomal DNA (Wafai Baaj & Kondo, ) indicated that the internal transcribed spacer (ITS) region was nearly identical among 40 C. gramineum isolates from Japan, Europe and USA. RFLP analysis of the intergenic spacer (IGS) region of the same 40 isolates identified only four genotypes.…”

Section: Population Structure and Genetic Variationmentioning

confidence: 99%

Biology and control of cephalosporium stripe of wheat

et al. 2014

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Cephalosporium stripe, caused by the fungus Cephalosporium gramineum, is the only known vascular wilt disease of small grain cereals. The pathogen causes characteristic striping of leaf blades and sheaths, but can also result in seedling death, stunting, and sterile seed heads (white heads). Cephalosporium stripe is a disease of autumn (fall)-sown wheat, especially in cool and wet production regions. The disease is further favoured by early sowing, reduced tillage practices, low pH soils, and by frost heaving that damages roots. Infections occur almost entirely from spores produced on surface crop debris that are washed into the soil, although a low level of seed transmission can also occur. The pathogen colonizes root epidermis and cortical cells, subsequently moves into the vascular tissue, and eventually spreads throughout the entire plant. Production of fungal toxin(s) and extracellular polysaccharides probably play an important role in pathogenesis. Cultural practices such as delayed sowing, crop rotation, destruction of crop debris, liming of soil and fertilizer management all have potential to reduce the incidence of cephalosporium stripe. All of these cultural practices have negative economic impacts and/or increase soil erosion, and thus there is much interest in the development of resistant cultivars. There is potential for introgression of highly effective resistance from wild species into cultivated wheat. Genes for quantitatively inherited resistance can also be accumulated within cultivated wheat to attain moderate resistance. The continued use of cultivars with moderate resistance will probably be sufficient for long-term control of the disease.

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Section: Population Structure and Genetic Variationmentioning

confidence: 99%

Biology and control of cephalosporium stripe of wheat

et al. 2014

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Identification of Cephalosporium stripe resistance quantitative trait loci in two recombinant inbred line populations of winter wheat

et al. 2014

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Identification of genome regions linked to Cephalosporium stripe resistance across two populations on chromosome 3BS, 4BS, 5AL, C5BL. Results were compared to a similar previous study. Cephalosporium stripe is a vascular wilt disease of winter wheat (Triticum aestivum L.) caused by the soil-borne fungus Cephalosporium gramineum Nisikado & Ikata. In the USA it is known to be a recurring disease when susceptible cultivars are grown in the wheat-growing region of Midwest and Pacific Northwest. There is no complete resistance in commercial wheat cultivars, although the use of moderately resistant cultivars reduces the disease severity and the amount of inoculum in subsequent seasons. The goal of this study was to detect and to compare chromosomal regions for resistance to Cephalosporium stripe in two winter wheat populations. Field inoculation was performed and Cephalosporium stripe severity was visually scored as percent of prematurely ripening heads (whiteheads) per plot. 'Tubbs'/'NSA-98-0995' and 'Einstein'/'Tubbs', each comprising a cross of a resistant and a susceptible cultivar, with population sizes of 271 and 259 F (5:6) recombinant inbred lines, respectively, were genotyped and phenotyped across four environments. In the quantitative trait loci (QTL) analysis, six and nine QTL were found, explaining in total, around 30 and 50 % of the phenotypic variation in 'Tubbs'/'NSA-98-0995' and 'Einstein'/'Tubbs', respectively. The QTL with the largest effect from both 'NSA-98-0995' and 'Einstein' was on chromosome 5AL.1 and linked to marker gwm291. Several QTL with smaller effects were identified in both populations on chromosomes 5AL, 6BS, and 3BS, along with other QTL identified in just one population. These results indicate that resistance to Cephalosporium stripe in both mapping populations was of a quantitative nature.

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Hymenula cerealis (Cephalosporium stripe)

Murray¹

2022

CABI Compendium

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Genotyping Cephalosporium gramineum and development of a marker for molecular diagnosis

Cited by 6 publications

References 27 publications

Biology and control of cephalosporium stripe of wheat

Biology and control of cephalosporium stripe of wheat

Identification of Cephalosporium stripe resistance quantitative trait loci in two recombinant inbred line populations of winter wheat

Hymenula cerealis (Cephalosporium stripe)

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