Further evidence of polygenic inheritance of partial resistance in barley to leaf rust, Puccinia hordei

Parlevliet, J.E.

doi:10.1007/bf00043161

Cited by 97 publications

(72 citation statements)

References 12 publications

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“…Partial resistance to leaf rust (Puccinia hordei Otth) in barley is a quantitative resistance that is inherited polygenically and is not based on hypersensitivity (Parlevliet 1978). In a previous study (Qi et al 1998), QTL mapping was performed in a recombinant inbred population derived from a cross between the susceptible L94 barley line and the partially resistant Vada barley cultivar, at the seedling stage and adult plant stage.…”

Section: Introductionmentioning

confidence: 99%

The phenotypic expression of QTLs for partial resistance to barley leaf rust during plant development

Wang

et al. 2010

Theor Appl Genet

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Partial resistance is generally considered to be a durable form of resistance. In barley, Rphq2, Rphq3 and Rphq4 have been identiWed as consistent quantitative trait loci (QTLs) for partial resistance to the barley leaf rust pathogen Puccinia hordei. These QTLs have been incorporated separately into the susceptible L94 and the partially resistant Vada barley genetic backgrounds to obtain two sets of near isogenic lines (NILs). Previous studies have shown that these QTLs are not eVective at conferring disease resistance in all stages of plant development. In the present study, the two sets of QTL-NILs and the two recurrent parents, L94 and Vada, were evaluated for resistance to P. hordei isolate 1.2.1 simultaneously under greenhouse conditions from the Wrst leaf to the Xag leaf stage. EVect of the QTLs on resistance was measured by development rate of the pathogen, expressed as latency period (LP). The data show that Rphq2 prolongs LP at the seedling stage (the Wrst and second leaf stages) but has almost no eVect on disease resistance in adult plants. Rphq4 showed no eVect on LP until the third leaf stage, whereas Rphq3 is consistently eVective at prolonging LP from the Wrst leaf to the Xag leaf. The changes in the eVectiveness of Rphq2 and Rphq4 happen at the barley tillering stage (the third to fourth leaf stages). These results indicate that multiple disease evaluations of a single plant by repeated inoculations of the fourth leaf to the Xag leaf should be conducted to precisely estimate the eVect of Rphq4. The present study conWrms and describes in detail the plant development-dependent eVectiveness of partial resistance genes and, consequently, will enable a more precise evaluation of partial resistance regulation during barley development.

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Section: Introductionmentioning

confidence: 99%

The phenotypic expression of QTLs for partial resistance to barley leaf rust during plant development

Wang

et al. 2010

Theor Appl Genet

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“…This resistance is readily available in barley cultivars (Parlevliet et al, 1980). It is inherited polygenically (Parlevliet, 1978), considered to be a durable form of resistance (Parlevliet, 1981a) and high levels can be selected for quite easily (Parlevliet and van Ommeren, 1988). Also in the barley cultivars present in Ecuador it was not difficult to find substantial levels of partial resistance (Vivar, 1994).…”

Section: Introductionmentioning

confidence: 99%

Effect of partial resistance to barley leaf rust, Puccinia hordei, on the yield of three barley cultivars

Ochoa

Parlevliet

2006

Euphytica

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Three barley cultivars, Shyri, Clipper and Terán, with different levels of partial resistance to barley leaf rust, caused by Puccinia hordei, were exposed to six levels of the pathogen. These levels were obtained by 5, 4, 3, 2, 1 and 0 fungicide (Propiconazol) applications respectively and occurred every 15 days starting at 66 days after sowing. No application served as the control treatment. There were three replicates. The six-row plots were surrounded by a row of a highly susceptible barley cultivar in which the barley leaf rust arrived naturally in a fairly early plant stage. The disease severity was assessed five times with 15 days intervals starting at 66 days after sowing. The yields were determined by harvesting the inner four rows of the plots.An analysis of variance was carried out on the area under the disease progress curve (AUDPC) data and on the yield data. 'Shyri' was the least susceptible cultivar, 'Terán' the most. The percentage yield losses varied with the six levels of pathogen from 0 to 31.5% ('Shyri'), from 0 to 46% ('Clipper') and from 0 to 63.5% ('Terán'). The yield losses correlated strongly with the AUDPC, the linear correlation coefficient being 0.97. The yield losses indicate the importance of the pathogen in Ecuador. It also means that high levels

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“…PR is characterized by a slow epidemic build-up despite a high infection type (non-hypersensitive type of resistance) indicating a compatible host-pathogen interaction (PARLEVLIET 1975). In most cases, PR is inherited polygenically (PARLEVLIET 1979;QI et al 1998) and hence selection for higher levels of resistance is less straightforward than for monogenically inherited traits. There are indications that PR of some wheat cultivars against wheat leaf rust may rely on a combination of few genes.…”

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Characterization of Lr46, a Gene Conferring Partial Resistance to Wheat Leaf Rust

et al. 2004

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Components of resistance conferred by the Lr46 gene, reported as causing "slow rusting'' resistance to leaf rust in wheat, were studied and compared with the effects of Lr34 and genes for quantitative resistance in cv. Akabozu. Lr34 is a gene that confers non-hypersensitive type of resistance. The effect of Lr46 resembles that of Lr34 and other wheats reported with partial resistance. At macroscopic level, Lr46 produced a longer latency period than observed on the susceptible recurrent parent Lalbahadur, and a reduction of the infection frequency not associated with hypersensitivity. Microscopically, Lr46 increased the percentage of early aborted infection units not associated with host cell necrosis and decreased the colony size. The effect of Lr46 is comparable to that of Lr34 in adult plant stage, but in seedling stage its effect is weaker than that of Lr34.

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Further evidence of polygenic inheritance of partial resistance in barley to leaf rust, Puccinia hordei

Cited by 97 publications

References 12 publications

The phenotypic expression of QTLs for partial resistance to barley leaf rust during plant development

The phenotypic expression of QTLs for partial resistance to barley leaf rust during plant development

Effect of partial resistance to barley leaf rust, Puccinia hordei, on the yield of three barley cultivars

Characterization of Lr46, a Gene Conferring Partial Resistance to Wheat Leaf Rust

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