Search for resistance to gummy stem blight (Didymella bryoniae) in cucumber (Cucumis sativus L.)

Wyszogrodzka, Anna J.; Williams, Paul H.; Peterson, C. E.

doi:10.1007/bf00021869

Cited by 19 publications

(28 citation statements)

References 9 publications

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“…The generally low estimates of broad and narrow sense heritability indicated that the environment in which the parents are tested has a larger effect on leaf rating than their genotypes. This finding is in agreement with the low realised heritability for mass selection reported by Wyszogrodzka et al (1986). Thus, breeding efforts to increase resistance will require good control over environmental variations.…”

Section: Discussionsupporting

confidence: 88%

Inheritance of resistance to Cotton leaf curl virus in cotton (Gossypium hirsutum L.)

Hussain¹,

Rauf²

2007

Plant Prot. Sci.

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Khan A. I., Hussain M., Rauf S., Khan T. M. (2007): Inheritance of resistance to Cotton leaf curl virus in cotton (Gossypium hirsutum L.). Plant Protect. Sci., 43: 5-9.Resistance to Cotton leaf curl virus (CLCuV) in three cultivars of cotton was investigated in crosses with a susceptible cultivar using generation mean analysis. No single gene of major effect controlled resistance to Cotton leaf curl virus in the three crosses. The mean number of effective factors controlling resistance in cross LRA-5166 × S-12 was estimated to be at least five. Estimates of broad and narrow sense heritability indicate that effects by the environment were larger than those of genetic components. Epistasis was significant in two crosses. Additive gene effects contributed more to resistance than to susceptibility in contrast with dominance gene effect. Reciprocal differences were detected in the cross with LRA-5166. Estimates of genetic gain ranged form low to moderate. Thus, a breeding method that makes use of additive variance should be used because much of the variances for resistance are additive, whereas dominance effects, at least in these crosses, tended to contribute to susceptibility.

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Section: Discussionsupporting

confidence: 88%

Inheritance of resistance to Cotton leaf curl virus in cotton (Gossypium hirsutum L.)

Hussain¹,

Rauf²

2007

Plant Prot. Sci.

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“…Methods of artificial inoculation or greenhouse screening of cucumbers (Cucumis sativus) for resistance to gummy stem blight Didymella bryoniae have been reported in at least 15 articles since 1949. Only Wyszogrodzka et al (1986) indicated that their test was correlated with field resistance. Their report did not specifically measure the correlation between field and greenhouse tests, but found that cultigens (breeding lines, cultivars, and plant introduction accessions) resistant in greenhouse tests were usually resistant in field tests.…”

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confidence: 99%

“…The greenhouse screening method reported by Wyszogrodzka et al (1986) did not account for the effects of phylloplane nutrition on the infectivity of Didymella bryoniae. Hordijk and Goosen (1962), Svedelius and Unestam (1978), and Svedelius (1990) have demonstrated the importance of nutrition external to the leaf in causing infection by D. bryoniae on cucumber.…”

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confidence: 99%

Greenhouse, Detached-leaf, and Field Testing Methods to Determine Cucumber Resistance to Gummy Stem Blight

Amand¹,

Wehner²

1995

jashs

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The effects of leaf age, guttation, stomata and hydathode characteristics, and wounding on the symptom development of gummy stem blight [Didymella bryoniae (Auersw.) Rehm] of cucumber (Cucumis sativus L.) were studied to develop a useful germplasm screening method. Older cucumber leaves were more susceptible than younger leaves in field, greenhouse, and detached-leaf tests. Compared to seedlings with true leaves, seedlings at the cotyledon stage were less susceptible, had a smaller variance for ratings, and were more likely to escape infection. Stomata density and hydathode counts were not correlated with field ratings; but, stomata length on older leaves was highly correlated with susceptibility y. In greenhouse and field tests, susceptibility y increased as guttation increased and actively guttating plants were more susceptible than nonguttating plants. Phylloplane moisture and/or nutrition were more important in the infection process than was stomata] opening. Although important, guttation was not necessary for infection. Dawn inoculation of field or greenhouse tests increased leaf symptoms compared with dusk inoculation. The increase was likely due to the free water and nutrients provided by guttation. Genotype ranks and ratings for detached-leaf tests were not correlated with field results. A useful method, highly correlated (r = 0.82 to 0.96) with field ratings. for screening germplasm in the greenhouse was developed. --

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“…Although differences have been observed between cultivars, no highly resistant types are available (Van der Meer et al, 1978, Wyszogrodzka et al, 1986. Nutritional conditions leading to higher dry matter content of the plant tissues are generally believed to confer resistance.…”

Section: Introductionmentioning

confidence: 97%

Studies of Didymella bryoniae: The influence of nutrition and cultural practices on the occurrence of stem lesions and internal and external fruit rot on different cultivars of cucumber

Neergaard¹,

Haupt²,

Rasmussen³

1993

Netherlands Journal of Plant Pathology

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Cucumber plants of different cultivars grown under various levels of nutrient supply, climatic conditions and different pruning practices were inoculated with Didymella bryoniae (Auersw.) Rehm. Increased concentration of the nutrient solution in the rockwool slabs leading to a higher amount of dry matter content in the plant tissue resulted in a lower percentage of internal and external fruit rot in the cultivars Daleva and LD 290/82 (D~ehnfeldt), and in lower percentage of internal fruit rot in cv. Aminex, whereas the effect on cv. Dalibor was insignificant. Differences between cultivars were observed, cv. Dalibor showing the highest level of resistance against internal fruit rot and lowest incidence of nodal and internodal lesions.Separate factors appear to affect the establishment of the pathogen in the nodal tissue and its invasion of the internodal tissue. By raising the temperature to daytime level 3 h before sunrise, the risk of extended periods with high humidity was limited and the incidence of internal fruit rot was reduced. An increased incidence of nodal and internodal lesions and external fruit rot was observed at reduced pruning, leaving wilted leaves and shoots on the plants.

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Search for resistance to gummy stem blight (Didymella bryoniae) in cucumber (Cucumis sativus L.)

Cited by 19 publications

References 9 publications

Inheritance of resistance to Cotton leaf curl virus in cotton (Gossypium hirsutum L.)

Inheritance of resistance to Cotton leaf curl virus in cotton (Gossypium hirsutum L.)

Greenhouse, Detached-leaf, and Field Testing Methods to Determine Cucumber Resistance to Gummy Stem Blight

Studies of Didymella bryoniae: The influence of nutrition and cultural practices on the occurrence of stem lesions and internal and external fruit rot on different cultivars of cucumber

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