Components of partial resistance to <i>Puccinia striiformis</i> in barley

Osman-Ghani, N.; Manners, J.G.

doi:10.1111/j.1365-3059.1985.tb02763.x

Cited by 11 publications

(10 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the seedling stage the differences in LP among cultivars were small. Osman-Ghani and Manners (1985), working with the same pathosystem, found similar results for winter barley. In the barley-barley leaf rust pathosystem Parlevliet (1975) and Parlevliet and Van Ommeren (1975) also observed small cultivar differences in LP in the seedling stage, while the LP in the flag leaf showed much larger differences between cultivars.…”

Section: Discussionsupporting

confidence: 70%

See 1 more Smart Citation

Quantitative resistance and its components in 16 barley cultivars to yellow rust, Puccinia striiformis f. sp. hordei

et al. 2006

View full text Add to dashboard Cite

Sixteen barley cultivars with a susceptible infection type (IT = 7-8) in the seedling stage to an isolate of race 24 of Puccinia striiformis f. sp. hordei were planted at two locations in Mé xico. Disease severity (DS) parameters were assessed for the flag leaf and for the upper three leaves. The cultivars represented at least five levels of quantitative resistance ranging from very susceptible to quite resistant. ''Granado'', ''Gloria/Copal'' and ''Calicuchima-92'' represented the most resistant group and had an IT of 7 or 8. The cultivar · environment interaction variance, although significant, was very small compared with the cultivar variance. The disease severity parameters were highly correlated. The monocyclic parameter DS m , measured when the most susceptible cultivar had reached its maximum DS, was very highly correlated with the area under the disease progress curve (AUDPC), r being 0.98.Components of quantitative resistance were evaluated in two plant stages. In the seedling stage small cultivar effects for the latency period were observed, which were not correlated with the quantitative resistance measured in the field. In the adult plant stage the latency period (LP), infection frequency (IF) and colonization rate (CR) were measured in the upper two leaves. The LP was much longer than in the seedling stage and differed strongly between cultivars. The differences in IF were too large, those in CR varied much less. The components showed association with one another. The LP and IF were well correlated with the AU-DPC (r = 0.7-0.8).

show abstract

Section: Discussionsupporting

confidence: 70%

“…In both spring and winter barley it has been found that some cultivars have high infection types in the seedling stage associated with high levels of quantitative resistance in the adult plant stage (Osman-Ghani and Manners 1985;Sandoval-Islas et al 1998).…”

Section: Introductionmentioning

confidence: 99%

Quantitative resistance and its components in 16 barley cultivars to yellow rust, Puccinia striiformis f. sp. hordei

et al. 2006

View full text Add to dashboard Cite

show abstract

“…Our results differ in that more variation is associated between incubation period, latent period, sporulation, and necrosis among genotypes when tested as seedlings than as adult plants in the field . Osman- Ghani & Manners (1985) reported similar findings for latent period and sporulation among barley genotypes compared for resistance to Puccinia striiformis . This may explain some of the differences between our results and those of Jeger et al .…”

Section: Discussionsupporting

confidence: 69%

Components of partial resistance to Leptosphaeria nodorum among seven soft red winter wheats

1988

View full text Add to dashboard Cite

Seven soft red winter wheat cultivars were evaluated for partial resistance to Leptosphaeria nodorum under field conditions . The results demonstrate that resistance is available among cultivars that are adapted to the southeastern U .S . and that resistance is long lasting . Resistant cultivars had longer incubation and latent periods, slower rates of lesion development, and reduced the level of sporulation of L . nodorum . Seedlings of susceptible cultivars sustained severe disease with dew periods as short as 48 hr in greenhouse tests . One resistant cultivar sustained little damage with dew period as long as 144 hr .Latent period was shortest on the second leaf below the flag leaf (F-2 leaf) of all cultivars and longest on the flag leaf which reflected the effect of microclimate and leaf age . The range in length of latent period on the flag, F-1, and F-2 leaves of resistant cultivars was less than that for susceptible cultivars . Differences between cultivars were greatest (up to 6 .8 days) for the F-2 leaf . A delay in production of inoculum on the F-2 and lower leaves of resistant cultivars should delay infection of the flag leaf and spike .The greatest differentiation among cultivars for sporulation of L . nodorum was on upper leaves at Feekes growth stage 11 .2 . `Oasis' consistently had less sporulation than other cultivars at all sampling dates and leaf positions. The rate of disease progress up the plant (disease severity) and area under the disease progress curve were also least on `Oasis' .There were significant correlations among components of resistance and associated components suggesting that a single or interrelated mechanisms control expression of resistance . Overall, `Oasis' was the most resistant cultivar followed by 'Coker 762' and 'Coker 747' . These cultivars have remained resistant for ten or more years . 'Stacy' was intermediate in resistance and was the most variable of the seven cultivars for the components tested . 'Holley', `Omega 78', and `Florida 301' were highly susceptible by all criteria tested . Plant height was not a factor in resistance . The resistant cultivars are mostly later in maturity than the susceptible cultivars. In this study, crop maturity was similar under existing environmental conditions during the two seasons when most data were collected .

show abstract

“…Dierences in the degree of virulence of dierent isolates were also found by Osman- Ghani and Manners (1985).…”

Section: Resistance Testsmentioning

confidence: 61%

New sources of resistance for stripe rust in barley

Münnich

Walther²,

Weber

et al. 2000

Plant Breeding

View full text Add to dashboard Cite

Eight spring barley accessions from the gene bank in Gatersleben, Germany, and 10 cultivars were tested for stripe rust resistance. Tests were performed at the seedling stage in the growth chamber and as adult plants in the ®eld. All accessions and six cultivars were scored as resistant against race 24 under all test conditions, with very few plants as exceptions, while the susceptible control cultivars`Karat' and`Certina', and four other cultivars were attacked in all cases. Dierences between accessions and between cultivars were detected after infection with isolates from`Trumpf' and`Bigo' (seedling tests only). Infection structures within seedling leaves without pustules and for the ®rst time within leaves of adult plants from the ®eld were analysed by¯uorescence microscopy. With this method additional genetic dierences in the resistance reaction could be detected which could not to be seen in the resistance test. Crosses between the accessions and the susceptible cultivar`Karat' led to segregating F 2 progenies. The percentage of resistant plants varied between the accessions. This also indicates a dierent genetic basis of resistance in the accessions. The infection structures observed by¯uorescence microscopy stopped earlier in leaves of the two accessions HOR 8979 and HOR 8991 than in leaves of other accessions in all the tests. These accessions were the only ones with more than 50% resistant plants in all F 2 tests. In general, the accessions from the gene bank can be used as new resistance sources against stripe rust.

show abstract

Components of partial resistance to Puccinia striiformis in barley

Cited by 11 publications

References 12 publications

Quantitative resistance and its components in 16 barley cultivars to yellow rust, Puccinia striiformis f. sp. hordei

Quantitative resistance and its components in 16 barley cultivars to yellow rust, Puccinia striiformis f. sp. hordei

Components of partial resistance to Leptosphaeria nodorum among seven soft red winter wheats

New sources of resistance for stripe rust in barley

Contact Info

Product

Resources

About