Powdery Mildew of Dogwoods: Current Status and Future Prospects

Li, Yonghao; Mmbaga, Margaret T.; Windham, Alan S.; Windham, Mark T.; Trigiano, Robert N.

doi:10.1094/pdis-93-11-1084

Cited by 30 publications

(31 citation statements)

References 28 publications

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“…Cultivars of Cornus florida display little resistance to this fungal disease. Of more than 100 available cultivars of Cornus florida (Santamour and McArdle 1985), only five (‘Jean’s Appalachian Snow’, ‘Karen’s Appalachian Blush’, ‘Kay’s Appalachian Mist’, ‘Appalachian Joy’ and ‘Cherokee Brave’) display high levels of tolerance or resistance to powdery mildew (Li et al 2009, Ranney et al 1995). Again, cultivars of Cornus kousa generally show high levels of tolerance (Li et al 2009, Ranney et al 1995).…”

Section: Discussionmentioning

confidence: 99%

“…Of more than 100 available cultivars of Cornus florida (Santamour and McArdle 1985), only five (‘Jean’s Appalachian Snow’, ‘Karen’s Appalachian Blush’, ‘Kay’s Appalachian Mist’, ‘Appalachian Joy’ and ‘Cherokee Brave’) display high levels of tolerance or resistance to powdery mildew (Li et al 2009, Ranney et al 1995). Again, cultivars of Cornus kousa generally show high levels of tolerance (Li et al 2009, Ranney et al 1995). Due to Orton’s selection of parents, several cultivars of Cornus × rutgersensis (e.g., Stellar Pink®, Aurora®, Stardust®, Celestial®, and Constellation®) are resistant to powdery mildew (Li et al 2009).…”

Section: Discussionmentioning

confidence: 99%

“…Again, cultivars of Cornus kousa generally show high levels of tolerance (Li et al 2009, Ranney et al 1995). Due to Orton’s selection of parents, several cultivars of Cornus × rutgersensis (e.g., Stellar Pink®, Aurora®, Stardust®, Celestial®, and Constellation®) are resistant to powdery mildew (Li et al 2009). …”

Section: Discussionmentioning

confidence: 99%

“…Cornus × rutgersensis shows resistance to dogwood anthracnose and resistance or high levels of tolerance to powdery mildew ( Erysiphe pulchra and Phyllactinia guttata ; Li et al 2009, Ranney et al 1995, Trigiano et al 2005).…”

Section: Taxonomic Treatmentmentioning

confidence: 99%

“…Seed and clonally propagated big-bracted dogwoods are popular ornamental landscape trees in subtropical to temperate regions around the world. Their most conspicuous characteristics are their large, white or red petaloid floral bracts, showy red fruits, and brightly colored fall foliage (Li et al 2009). Cornus kousa can be easily distinguished from the other two species by its round, fleshy multiple fused fruits formed from a whole flower head (as opposed to single, separate drupes from each flower arranged in clusters).…”

Section: Introductionmentioning

confidence: 99%

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Cornus × elwinortonii and Cornus × rutgersensis (Cornaceae), new names for two artificially produced hybrids of big-bracted dogwoods

Mattera¹,

Molnar²,

Struwe³

2015

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Big-bracted dogwoods (Cornus sp.) are well-known plants in North America and eastern Asia where they occur as wild, generally spring-flowering understory trees. They are also popular ornamental landscape plants, and many economically important cultivars are propagated and sold across North America, Europe, and Asia. Starting in the late 1960s, Elwin Orton of Rutgers University in New Jersey (USA) utilized three geographically disjunct species of dogwoods, C. florida (eastern North America), C. nuttallii (western North America), and C. kousa (East Asia), in an extensive interspecific hybridization program. He was successful in developing the first-ever interspecific F 1 hybrids of these species, several of which have become staple items in the ornamental nursery trade due to their enhanced ornamental qualities and resistance to diseases. The original F 1 plants are still alive at Rutgers University. While they have been available for decades in horticultural commerce, the interspecific hybrid crosses were never formally described and their scientific hybrid names were never published. For the C. kousa × C. florida hybrids, the name Cornus 'rutgersensis' has been used on occasion in the horticultural trade, but without proper citation and description. Here, it is formally named Cornus × rutgersensis Mattera, T. Molnar, & Struwe, hybr. nov. For the C. kousa × C. nuttallii hybrids, no previous name has been used, and it is hereby named Cornus × elwinortonii Mattera, T. Molnar, & Struwe, hybr. nov. The need for providing scientific names for commonly used horticultural hybrids is discussed. Holotype material for both hybrid names was collected from the original F 1 hybrids for full documentation, typification, and description. The comparative intermediate development of leaves, inflorescence structures, and fruit types of the hybrids and their parents is discussed and illustrated. Etymology, phenology, and cultivation aspects of these hybrids and their cultivars including backcrosses to C. kousa are also presented. RESEARCH ARTICLE Launched to accelerate biodiversity research A peer-reviewed open-access journalRobert Mattera et al. / PhytoKeys 55: 93-111 (2015) 94

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Taxonomic Treatmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cornus × elwinortonii and Cornus × rutgersensis (Cornaceae), new names for two artificially produced hybrids of big-bracted dogwoods

Mattera¹,

Molnar²,

Struwe³

2015

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Ecological genomics of local adaptation inCornus floridaL. by genotyping by sequencing

Pais

Whetten

Xiang

2016

Ecology and Evolution

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Discovering local adaptation, its genetic underpinnings, and environmental drivers is important for conserving forest species. Ecological genomic approaches coupled with next‐generation sequencing are useful means to detect local adaptation and uncover its underlying genetic basis in nonmodel species. We report results from a study on flowering dogwood trees (Cornus florida L.) using genotyping by sequencing (GBS). This species is ecologically important to eastern US forests but is severely threatened by fungal diseases. We analyzed subpopulations in divergent ecological habitats within North Carolina to uncover loci under local selection and associated with environmental–functional traits or disease infection. At this scale, we tested the effect of incorporating additional sequencing before scaling for a broader examination of the entire range. To test for biases of GBS, we sequenced two similarly sampled libraries independently from six populations of three ecological habitats. We obtained environmental–functional traits for each subpopulation to identify associations with genotypes via latent factor mixed modeling (LFMM) and gradient forests analysis. To test whether heterogeneity of abiotic pressures resulted in genetic differentiation indicative of local adaptation, we evaluated F st per locus while accounting for genetic differentiation between coastal subpopulations and Piedmont‐Mountain subpopulations. Of the 54 candidate loci with sufficient evidence of being under selection among both libraries, 28–39 were Arlequin–BayeScan F st outliers. For LFMM, 45 candidates were associated with climate (of 54), 30 were associated with soil properties, and four were associated with plant health. Reanalysis of combined libraries showed that 42 candidate loci still showed evidence of being under selection. We conclude environment‐driven selection on specific loci has resulted in local adaptation in response to potassium deficiencies, temperature, precipitation, and (to a marginal extent) disease. High allele turnover along ecological gradients further supports the adaptive significance of loci speculated to be under selection.

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Estimation of narrow sense heritability of powdery mildew resistance in pseudo F2 (F1) population of flowering dogwoods (cornus Florida L)

et al. 2015

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Powdery Mildew of Dogwoods: Current Status and Future Prospects

Cited by 30 publications

References 28 publications

Cornus × elwinortonii and Cornus × rutgersensis (Cornaceae), new names for two artificially produced hybrids of big-bracted dogwoods

Cornus × elwinortonii and Cornus × rutgersensis (Cornaceae), new names for two artificially produced hybrids of big-bracted dogwoods

Ecological genomics of local adaptation inCornus floridaL. by genotyping by sequencing

Estimation of narrow sense heritability of powdery mildew resistance in pseudo F2 (F1) population of flowering dogwoods (cornus Florida L)

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