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<p>A <italic>Pratylenchus</italic> species identified during a survey of <italic>Pratylenchus quasitereoides</italic> incidence at four locations of the grainbelt of Western Australia is described. Morphological and morphometric features indicated the previously undescribed morphotypes in nematode mixtures encountered were conspecific to <italic>P. curvicauda</italic>, and were clearly distinguishable from nine common <italic>Pratylenchus</italic> spp. Typical features of <italic>P. curvicauda</italic> were its body length (415–540 µm), which was curved to a c-shaped with a maximum body diameter of 20 µm, and the nature of its tail; 34 µm long, 2.8 µm wide at the anus and a typical ventrally arcuate with a round terminus. Sequenced for the first time, the sequences of the partial 18S-ITS1-5.8S-ITS2-partial 28S (80 clones, 14 individual nematodes) and the 28S-D3 (17 clones) regions of the rDNA of <italic>P. curvicauda</italic> had overall mean distances of 0.013 and 0.085, respectively. Phylogenetic analyses with sequences of both segments of the rDNA clearly showed the <italic>P. curvicauda</italic> isolates as monophyletic, distinct from ca 40 <italic>Pratylenchus</italic> species. Notably, it was distinct from <italic>Pratylenchus</italic> species present in Australia including <italic>P. quasitereoides</italic> and a Western Australia isolate of <italic>P. thornei</italic>. Further research into the biology of <italic>P. curvicauda</italic> is needed to facilitate development of strategies for its management, if it is an important pest.</p>
</abstract>

A Pratylenchus species identified during a survey of Pratylenchus quasitereoides incidence at four locations of the grainbelt of Western Australia is described. Morphological and morphometric features indicated the previously undescribed morphotypes in nematode mixtures encountered were conspecific to P. curvicauda, and were clearly distinguishable from nine common Pratylenchus spp. Typical features of P. curvicauda were its body length (415–540 µm), which was curved to a c-shaped with a maximum body diameter of 20 µm, and the nature of its tail; 34 µm long, 2.8 µm wide at the anus and a typical ventrally arcuate with a round terminus. Sequenced for the first time, the sequences of the partial 18S-ITS1-5.8S-ITS2-partial 28S (80 clones, 14 individual nematodes) and the 28S-D3 (17 clones) regions of the rDNA of P. curvicauda had overall mean distances of 0.013 and 0.085, respectively. Phylogenetic analyses with sequences of both segments of the rDNA clearly showed the P. curvicauda isolates as monophyletic, distinct from ca 40 Pratylenchus species. Notably, it was distinct from Pratylenchus species present in Australia including P. quasitereoides and a Western Australia isolate of P. thornei. Further research into the biology of P. curvicauda is needed to facilitate development of strategies for its management, if it is an important pest.

Serendipitous identification of <italic>Pratylenchus curvicauda</italic> from the grainbelt of Western Australia

Journal of Nematology

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Serendipitous identification of  from the grainbelt of Western Australia

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A Pratylenchus species identified during a survey of Pratylenchus quasitereoides incidence at four locations of the grainbelt of Western Australia is...

Serendipitous identification of Pratylenchus curvicauda from the grainbelt of Western Australia

Article Category: Arts & Humanities

Publicado en línea: 29 jul 2019

Páginas: 1 - 15

Recibido: 17 feb 2019

DOI: https://doi.org/10.21307/jofnem-2019-046

© 2019 Farhana Begum et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.