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Wide genetic diversity of Ralstonia solanacearum strains affecting tomato in Trinidad, West Indies

, : Wide genetic diversity of Ralstonia solanacearum strains affecting tomato in Trinidad, West Indies. Plant Pathology 61(5): 0-0

The genetic diversity of Ralstonia solanacearum causing bacterial wilt of tomato in Trinidad was assessed using the hierarchical phylotyping scheme and rep-PCR DNA fingerprinting. Seventy-one isolates were collected in 23 on infected tomato crops in the four main vegetable cropping areas of Trinidad (North, Central, South-East and South). Two phylotypes were present, with phylotype II being much more prevalent (66%) than phylotype I (34%). Phylotype II strains consisted mainly of sequevar 7 in Central and South-East, and sequevar 35 in North, South-East and South. This is the first report of sequevar 7 outside south-eastern USA. In contrast, no brown rot (phylotype IIB/1, race 3 biovar 2) or emerging strains of phylotype IIB/4NPB were identified. Rep-PCR data were used to assess population genetic structure. No significant clustering by geographical distance was found, suggesting regular gene flow among cropping areas (via waterways, plant or soil). However, the population from Central was significantly differentiated from the others, containing only phylotype II/seq 7 strains, with a high degree of clonality, suggesting a possible recent introduction from abroad. The South population was less aggressive and more genetically diverse, suggesting horizontal gene transfers within the population, even among isolates of different phylotypes. Phylotype I and phylotype II populations differed slightly in clonality levels, with indications of more frequent recombination events within phylotype I populations. Possible factors influencing genetic diversity and distribution within the island are discussed.


DOI: 10.1111/j.1365-3059.2011.02572.x

Other references

Hart, V.K., 2014: Intrathoracic lesions of clinical and pathologic interest; ganglioneuroma of mediastinum; endobronchial adenoma; endobronchial and extrabronchial adenoma; total, permanent, benign, obstructive, unilateral atelectasis, cyst of mediastinum. Laryngoscope 56: 367-388

Weed E.G.A. (investigator); Stone B.D. (investigator); Duty D.W. (investigator); Lyons P.C. (investigator), 1979: Narragansett Basin extends to Massachusetts coast. U S

Michalak, S.M.; Whitman, M.C.; Park, J.G.; Tischfield, M.A.; Nguyen, E.H.; Engle, E.C., 2017: Ocular Motor Nerve Development in the Presence and Absence of Extraocular Muscle. To spatially and temporally define ocular motor nerve development in the presence and absence of extraocular muscles (EOMs). Myf5cre mice, which in the homozygous state lack EOMs, were crossed to an IslMN:GFP reporter line to fluorescently label m...

Ocheke, A.N.; Onoja, K.O.; Nkwocha, G.C.; Oriji, V.K.; Ezugwu, E.C., 2015: Surgical Proficiency of Obstetrics and Gynaecologic Residents in Nigeria. The aim of residency training is to produce competent and professional experts in their areas of specialty. Surgical proficiency is required to be able to offer patients a genuine choice of treatment options and safety of procedures performed. We...

Govinda-Raj,, S., 1981: Correlation and path analysis in hexaploid triticale Genotypes, in India. Crop improvement 8(1): 47-51

Matkovskiĭ, V.S.; Antonov, V.S.; Mebel', B.D.; Mokrov, B.A., 1970: Basic principles and method of treatment of epidemic cerebrospinal meningitis. Voenno-Meditsinskii Zhurnal 10: 25-30

Gamm, E.G.; Abdulkadyrova, M.Zh., 1989: A method for assessing the resistance of the optic nerve to increased intraocular pressure. The examinations have involved 62 subjects (116 eyes), of these 48 ones with open-angle glaucoma and 14 with suspected glaucoma. Vacuum compression of the eye with simultaneous recording of the visual evoked potentials (electroencephalodynamograph...

Shumakovich, E.E., 1972: Construction of helminthological science and practice in the USSR. Volume 5. Bibliography. In 1965 the author produced a bibliography of Russian general and veterinary helminthology from the end of the 18th century to 1960 [see V.B. 36, abst. 620]. The present bibliography is in two parts: 1961 to 1965 (7801 references) and 1966 to 1967...

Sacco, F., 1890: I Molluschi dei Terreni Terziarii del Piemonte e della Liguria. Parte VII. Harpidae e Cassididae. Many tables given. Galeodocassis, n. subg.; Echinophoria, n. subg. of Cassis; Galeodosconsia, n. subg.; Morionassa, n. subg. of Morio. Many new species and varieties.

Beato, V.; Herreros, J., 1954: Uterine myoma and its treatment; review of 77 cases. Toko-Ginecologia Practica 13(118): 1-25