Nematodes of Agricultural Importance in North and South Carolina

Ye, Weimin

doi:10.1007/978-3-319-99588-5_10

Cited by 18 publications

(17 citation statements)

References 52 publications

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“…Additionally, moving forward, tobacco growers in the southeastern United States face a new, highly destructive, polyphagous nematode threat in the form of M. enterolobii . This nematode, which has recently been found on root-knot resistant sweet potato in South Carolina ( Rutter et al, 2019 ) and is present in at least eight counties in North Carolina ( Schwartz, 2019 ) is a quarantine-level pathogen ( Thiessen, 2018 ) that, while not yet known to be directly impacting tobacco growers, presents a potentially serious threat, as this nematode is not controlled by available forms of resistance including Mi and Rk -mediated resistance ( Ye, 2018 ). Perhaps exploiting N. repanda germplasm, which has long been a source of novel traits for cultivated tobaccos ( Stavely et al, 1973 ) could present solutions to these and other issues facing tobacco breeders and growers alike.…”

Section: Discussionmentioning

confidence: 99%

Reproduction of Meloidogyne arenaria race 2 on flue-cured tobacco with putative resistance derived from Nicotiana repanda

Adamo

Johnson

Reed

et al. 2021

Journal of Nematology

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Chemical controls for root-knot nematodes are increasingly restricted due to environmental and human health concerns. Host resistance to these nematodes is key to flue-cured tobacco production in Virginia. Resistance to Meloidogyne incognita races 1 and 3, and race 1 of M. arenaria is imparted by the gene Rk1, which is widely available in commercial flue-cured tobacco. Rk2 imparts increased resistance to M. javanica when stacked with Rk1 and is becoming commercially available. The efficacy of Rk2 against M. arenaria race 2, which is increasingly prevalent in Virginia, is unclear. Greenhouse trials were conducted in 2017 to determine how potential resistance derived from N. repanda compares to the root-knot nematode resistance afforded by Rk1 and Rk2. Trials were arranged in a completely randomized block design and included an entry with traits derived from N. repanda, a susceptible entry and entries possessing Rk1 and/or Rk2. Data collected after 60 days included percent root galling, egg mass counts, and egg counts. Root galling and reproduction were significantly lower on the entry possessing traits derived from N. repanda relative to other entries, suggesting that the N. repanda species may hold a novel source of root-knot nematode resistance for commercial flue-cured tobacco cultivars.

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Section: Discussionmentioning

confidence: 99%

Reproduction of Meloidogyne arenaria race 2 on flue-cured tobacco with putative resistance derived from Nicotiana repanda

Adamo

Johnson

Reed

et al. 2021

Journal of Nematology

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“…(1984, Lehman (2002) T. coomansi De Waele & Carbonell, 1982Florida Lehman (2002 T. cottieri Clark, 1963Florida Lehman (2002 T. cylindricus Hooper, 1962Florida Anon. (1984 T. dilatatus Rodriguez & Bell, 1978California Rodriguez & Bell (1978 T. elefjohnsoni Bernard, 1992b Tennessee, North Carolina Bernard (1992b), Ye (2018) T. elegans Allen, 1957Idaho Anon. (1984 T. hooperi Loof, 1973Florida Lehman (2002 T. intermedius Rodriguez & Bell, 1978 California, Florida Lehman (2002); Rodriguez & Bell (1978); this study T. minzi De Waele & Cohn, 1992 Florida Lehman (2002) T. obscurus Allen, 1957Arkansas, California, Florida, Maryland, New Jersey, Oregon, Pennsylvania, Virginia, Siddiqui et al (1973Anon.…”

Section: Discussionmentioning

confidence: 99%

Molecular characterisation of some stubby root nematodes (Nematoda: Trichodoridae) from the USA and other countries

et al. 2019

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SummaryThe stubby root nematodes are world-wide distributed polyphagous root ectoparasites and can cause damage to a wide range of crops and natural vegetation. In this study, 22 valid and putative species of stubby root nematodes were identified in 37 samples collected in Malaysia, Mexico, Russia, and the USA (California, Florida, Minnesota and Nevada). The analysis of 58 new sequences of the D2-D3 expansion fragments of 28S rRNA gene revealed the following species: Nanidorus minor from California, Florida and Mexico, N. renifer from Florida, two unidentified Nanidorus species from California and Malaysia, respectively, Paratrichodorus allius from Florida and Minnesota, P. pachydermus and Paratrichodorus sp. from Russia, Trichodorus californicus, T. intermedius, and T. obscurus from California, T. obtusus from Florida, eight unidentified Trichodorus species from California, one unidentified Trichodorus species from Nevada, and two unidentified species of stubby root nematodes, one of Trichodorus and another undetermined species from Mexico. Molecular characterisation of T. californicus, T. intermedius and T. obscurus is given for the first time. The phylogenetic tree reconstructed from the analysis of 108 D2-D3 of 28S rRNA gene sequences of 58 valid and putative species of the stubby root nematodes contained five major clades: i) Trichodorus from Europe, Asia and North America; ii) Nanidorus and Trichodorus from Asia; iii) Trichodorus from California; iv) Paratrichodorus from several distant geographical regions; and v) Monotrichodorus from Central and South America. It has been hypothesised that the California Floristic Province is one of the centres of origin and diversification of stubby root nematodes. There is no information on the economic importance of the stubby root nematode species found in California and Mexico. The confirmation of the occurrence of N. renifer and P. allius in Florida should be of concern for the blueberry and potato industries in the state.

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“…Among lance nematodes, Hoplolaimus galeatus is a widely distributed species. In the USA, H. galeatus can be found along the East Coast from New England to Florida, along the Mississippi River basin (from Minnesota and Wisconsin to Louisiana), in Colorado, Texas, and southern California ( Crow & Brammer, 2001 ; Ye, 2018 ). This species is also found in Canada, Sumatra, India, Tanzania, as well as in Central and South America ( Crow & Brammer, 2001 ; Ye, 2018 ).…”

Section: Introductionmentioning

confidence: 99%

“…In the USA, H. galeatus can be found along the East Coast from New England to Florida, along the Mississippi River basin (from Minnesota and Wisconsin to Louisiana), in Colorado, Texas, and southern California ( Crow & Brammer, 2001 ; Ye, 2018 ). This species is also found in Canada, Sumatra, India, Tanzania, as well as in Central and South America ( Crow & Brammer, 2001 ; Ye, 2018 ). This phyto-pathogen feeds and reproduces on a wide range of host plants, including Bermuda grass, boxwood, Chinese holly, corn, cotton, creeping bentgrass, creeping grasses, slash pine, soybean, tall fescue, and white clover ( Ye, 2018 ).…”

Section: Introductionmentioning

confidence: 99%

Genome survey sequencing of the phyto-parasitic nematode Hoplolaimus galeatus

Agudelo

Richards

et al. 2022

PeerJ

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Background Hoplolaimus galeatus is a plant-parasite nematode with a broad range of hosts. This nematode is known to damage cotton, corn, and soybean crops. Hoplolaimus galeatus is also an economically important pest of turfgrasses. Despite its economical importance, no genomic resources exist for this parasite. Methods Using 300 bp paired-end short read sequencing, this study estimated genome size, analyzed a nearly complete mitochondrial chromosome, and explored nuclear repetitive elements, including microsatellites, in H. galeatus for the first time. The phylogenetic placement of H. galeatus in the superfamily Tylenchoidea was also examined. Results The average haploid genome size estimated using a k-mer approach was 517.69 Mbp. The partially assembled mitochondrial genome of H. galeatus is 16,578 bp in length and comprised of 11 protein-coding genes, two ribosomal RNA genes, and 16 transfer RNA genes. A maximum likelihood phylogenetic analysis confirmed the monophyly of the genus Hoplolaimus and the superfamily Tylenchoidea. Repetitive elements constituted 50% of the nuclear genome while half of the genome represented single- or low-copy sequences. A large portion of repetitive sequences could not be assigned to known repeat element families. Considering only annotated repetitive elements, the most ubiquitous belonged to Class II- Subclass 2-Maverick elements, Class I-LTR-Ty-3/Bel-Pao elements, and satellites. 45S ribosomal DNA was also abundant and a total of 36 SSRs were identified.This study developed genomic resources for the plant-parasitic nematode Hoplolaimus galeatus that will contribute to the better understanding of meta-population connectivity and putative genomic mechanisms involved in the exploitation of the broad range of host plants used by H. galeatus.

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Nematodes of Agricultural Importance in North and South Carolina

Cited by 18 publications

References 52 publications

Reproduction of Meloidogyne arenaria race 2 on flue-cured tobacco with putative resistance derived from Nicotiana repanda

Reproduction of Meloidogyne arenaria race 2 on flue-cured tobacco with putative resistance derived from Nicotiana repanda

Molecular characterisation of some stubby root nematodes (Nematoda: Trichodoridae) from the USA and other countries

Genome survey sequencing of the phyto-parasitic nematode Hoplolaimus galeatus

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