<i>Septoria tritici</i> Resistance and Associations with Agronomic Traits in a Wheat Cross

Camacho-Casas, Miguel Alfonso; Kronstad, W. E.; Scharen, A. L.

doi:10.2135/cropsci1995.0011183x003500040006x

Cited by 25 publications

(23 citation statements)

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“…Levels of STB were substantially lower in later‐heading than in earlier‐heading lines (Fig. 1a), consistent with previous results (Shaner et al , 1975; Tavella, 1978; Eyal, 1981; van Beuningen & Kohli, 1990; Camacho‐Casas et al , 1995; Chartrain et al , 2004). Height components had a smaller effect on the variation of STB (Table 2), consistent with the results of Arama et al (1994, 1999), who studied a set of wheat cultivars.…”

Section: Discussionsupporting

confidence: 92%

“…The effect of individual major reduced‐height genes ( Rht ) on STB infection has been studied (Tavella, 1978; Eyal, 1981; Baltazar et al , 1990; van Beuningen & Kohli, 1990; Jlibene et al , 1992; Camacho‐Casas et al , 1995; Simón et al , 2004). Baltazar et al (1990) found that near‐isogenic lines carrying the Norin 10 gene Rht‐D1b (formerly Rht2 ) were less susceptible to STB than lines with no Rht genes, or with the other Norin 10 gene Rht‐B1b (formerly Rht1 ), although the Rht‐D1b line was shorter than the other two.…”

Section: Introductionmentioning

confidence: 99%

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Resistance of wheat to septoria tritici blotch (Mycosphaerella graminicola) and associations with plant ideotype and the 1BL−1RS translocation

Arraiano¹,

Brading²,

Dedryver³

et al. 2005

Plant Pathology

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Septoria tritici blotch (STB) is a major disease of wheat, reaching epidemic proportions in many parts of the world. In several studies, taller, later-maturing cultivars have had lower disease levels. This study was undertaken to investigate the genetic associations of natural field infection by STB with disease-escape mechanisms related to heading date and height components, mainly leaf spacing, in a population where height and maturity are not controlled by major genes. In field trials of a single seed-descent population of a cross between two nonsemi-dwarf cultivars, Apollo (with strong partial resistance to STB) and Thésée (susceptible), conducted over 3 years, there was a negative correlation between STB and heading date. There was no correlation between STB and distance from stem base to leaf 2; and there was an unexpected positive correlation between STB and distance from flag leaf to leaf 2, which contradicted the so-called 'ladder effect' postulated in STB epidemiology. No effect was detected of the presence of the 1BL − 1RS translocation on STB levels. The largest single contributor to variation in STB levels was genetic variation between the progeny lines, and the narrow-sense heritability was 42%. These results suggest that breeders can select for STB resistance alongside optimal stature within the range of height which is adaptive in a particular environment.

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Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Resistance of wheat to septoria tritici blotch (Mycosphaerella graminicola) and associations with plant ideotype and the 1BL−1RS translocation

Arraiano¹,

Brading²,

Dedryver³

et al. 2005

Plant Pathology

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“…However, several European lines had better resistance than Cappelle Desprez, which suggests that resistance genes must have been accumulated from several sources. Quantitative resistance to septoria tritici blotch in European wheat cultivars is therefore probably polygenic, controlled by many genes, each with a small effect, as is similar resistance in American material (Jlibene et al ., 1994; Camacho‐Casas et al ., 1995). Progress in improving resistance to septoria tritici blotch may be made by intercrossing lines from different European breeding programmes.…”

Section: Discussionmentioning

confidence: 99%

Resistance of wheat cultivars and breeding lines to septoria tritici blotch caused by isolates of Mycosphaerella graminicola in field trials

Brown

Kema²,

Forrer

et al. 2001

Plant Pathology

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Isolate-specific resistance of 71 cultivars and breeding lines of wheat (Triticum aestivum) to septoria tritici blotch was evaluated in six field trials in the Netherlands, Switzerland and the UK between 1995 and 1997. Each plot was inoculated with one of six single-pycnidium isolates of the pathogen Mycosphaerella graminicola. There were strong interactions between wheat lines and M. graminicola and the line-by-isolate interactions were stable over the six trials. Lines with specific resistance or specific susceptibility to each of the isolates were identified. Specific resistance to isolate IPO323 was especially common, being carried by 22 lines from 10 countries. The results confirm that lineby-isolate interactions in septoria tritici blotch of wheat are effective in adult plants in field conditions, and are not simply confined to seedlings. Wheat lines with good, quantitative resistance to all or most isolates were identified, including lines from Brazil, the USA and seven European countries. These may be useful as sources of resistance in wheat breeding.

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“…In highly susceptible cultivars, this disease may reduce grain yield by 50% (Eyal and Ziv, 1974). Regarded as a wet weather disease (Shaner and Finney, 1976), it is highly destructive in a number of European countries, western Australia (Eyal et al, 1973), New Zealand (Gaunt et al, 1986), the Southern Cone of Latin America (De Ackermann et al, 1995), the Pacific Northwest (Camacho‐Casas et al, 1995), and eastern regions of the USA (Shaner and Finney, 1982). In the northern Great Plains of the USA, severe epidemics of septoria diseases on winter wheat have been observed during the last decade when S. tritici was the predominant causal species.…”

mentioning

confidence: 99%

“…Wilson (1985) proposed three different genes conferring resistance to STB, designated Slb1 , Slb2 , and Slb3 A second inheritance model proposes that resistance is conditioned by more than one major gene (Eyal et al, 1987). Resistance to STB also has been considered as a quantitative trait, as intermediate resistance has been commonly identified in wheat and a continuous distribution of phenotypes in the F 2 population for disease reaction was observed in the field (Camacho‐Casas et al, 1995). Jlibene et al (1994) and Simon and Cordo (1998) reported significant GCA for resistance to STB.…”

mentioning

confidence: 99%

Inheritance of Septoria Tritici Blotch Resistance in Winter Wheat

2001

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Septoria tritici blotch (STB), a fungal foliar disease of wheat (Triticum aestivum L.) caused by Septoria tritici Rob. ex Desm., is a major constraint to wheat production worldwide. Understanding the inheritance of resistance in known resistant genotypes would potentially lead to more efficient deployment of host plant resistance. In our study, inheritance of seedling STB resistance was evaluated by an eight‐parent full diallel set of crosses. Parents, F1, and reciprocal F1 were planted in a greenhouse on three different dates. Within each planting date, three to five seeds of each entry were planted in a randomized complete block design with three replicates. Plants at the second‐leaf stage were inoculated with a bulk of six S. tritici isolates. Significant general combining ability (GCA), specific combining ability (SCA), and reciprocal effects were observed in the analysis of variance. The ratio of GCA sum of squares relative to SCA sum of squares suggested that GCA was more important than SCA. Additive gene effects played a major role in host response to STB, while nonadditive gene effects were also detected. General combining ability effects of individual genotypes were in a close agreement with parental performance. ‘KS94U338’, a genotype with putative resistance derived from Aegilops tauschii Coss., had the lowest STB score and the highest general combining ability. Our results suggested that KS94U338, which possesses resistance thought to be distinct from other known sources, should prove useful in breeding efforts to improve STB resistance in wheat.

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Septoria tritici Resistance and Associations with Agronomic Traits in a Wheat Cross

Abstract: Septoria leaf blotch of wheat (Triticum aestivura L. em Thell) caused by the pathogen Septoria tri~'ci Rob. in Desm. [telemorph Mycosphaerella graminicola (Fuckel) J. Schroeter in Cohn] is a major disease reaching epidemic proportions in many parts of the world. Concerns

Cited by 25 publications

References 0 publications

Resistance of wheat to septoria tritici blotch (Mycosphaerella graminicola) and associations with plant ideotype and the 1BL−1RS translocation

Resistance of wheat to septoria tritici blotch (Mycosphaerella graminicola) and associations with plant ideotype and the 1BL−1RS translocation

Resistance of wheat cultivars and breeding lines to septoria tritici blotch caused by isolates of Mycosphaerella graminicola in field trials

Inheritance of Septoria Tritici Blotch Resistance in Winter Wheat

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