<abstract xmlns="http://www.w3.org/1999/xhtml">

<p><italic>Pratylenchus haiduongensis</italic> sp. n. is described as associated with carrot (<italic>Daucus carota</italic> subsp. sativus (Hoffm.) Schübl. &amp; G. Martens) in Hai Duong Province, Vietnam. <italic>P. haiduongensis</italic> sp. n. is characterized by the lip region with three annuli and slightly separated from the body. Stylet knobs are rounded (never indented anteriorly). The lateral field includes four incisures, bearing areolation at the pharynx region and tail region and occasionally appears in the vulval region. Sometimes the appearances of oblique broken striaes divide the lateral field into five or six incisures. The ovary is distinct with one row of oocytes. Spermatheca is oval in shape with round central cavity, without sperm or reduced in some specimens. The postvuval uterine sac is long surpassing the vulva body diameter by 2 to 2.5 times (PUS = 31 to 65 mm). High vulva position with V = 66 to 75%. The tail shape can be subhemispherical with a smooth, slightly indented, broadly smooth, or cleft terminus observed in some specimens. The matrix code of <italic>P. haiduongensis</italic> sp. n. is: A2, B1, C4, D(1,3), E1, F(5,6), G(1,2), H(1,4); I(1,2,3,4), J1, K(1,2) according to Castillo and Vovlas (2007). The LSU–D2D3 segment and the ITS–rDNA region of this species were amplified and sequenced. The morphological characters and molecular phylogenetic analyses confirmed that this is a new species of the genus <italic>Pratylenchus</italic> in Vietnam.</p>
</abstract>

Pratylenchus haiduongensis sp. n. is described as associated with carrot (Daucus carota subsp. sativus (Hoffm.) Schübl. & G. Martens) in Hai Duong Province, Vietnam. P. haiduongensis sp. n. is characterized by the lip region with three annuli and slightly separated from the body. Stylet knobs are rounded (never indented anteriorly). The lateral field includes four incisures, bearing areolation at the pharynx region and tail region and occasionally appears in the vulval region. Sometimes the appearances of oblique broken striaes divide the lateral field into five or six incisures. The ovary is distinct with one row of oocytes. Spermatheca is oval in shape with round central cavity, without sperm or reduced in some specimens. The postvuval uterine sac is long surpassing the vulva body diameter by 2 to 2.5 times (PUS = 31 to 65 mm). High vulva position with V = 66 to 75%. The tail shape can be subhemispherical with a smooth, slightly indented, broadly smooth, or cleft terminus observed in some specimens. The matrix code of P. haiduongensis sp. n. is: A2, B1, C4, D(1,3), E1, F(5,6), G(1,2), H(1,4); I(1,2,3,4), J1, K(1,2) according to Castillo and Vovlas (2007). The LSU–D2D3 segment and the ITS–rDNA region of this species were amplified and sequenced. The morphological characters and molecular phylogenetic analyses confirmed that this is a new species of the genus Pratylenchus in Vietnam.

Morphological and Molecular Characteristics of <italic>Pratylenchus haiduongensis</italic> sp. n., a New Species of Root–Lesion Nematodes Associated with Carrot in Vietnam

Vietnam Academy of Sciences and Technology

Universidad de Jaén, Campus ‘Las Lagunillas’

Journal of Nematology

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

Morphological and Molecular Characteristics of  sp. n., a New Species of Root–Lesion Nematodes Associated with Carrot in Vietnam

Pratylenchus haiduongensis sp. n. is described as associated with carrot (Daucus carota subsp. sativus (Hoffm.) Schübl. & G. Martens) in Hai Duong Province,...

Morphological and Molecular Characteristics of Pratylenchus haiduongensis sp. n., a New Species of Root–Lesion Nematodes Associated with Carrot in Vietnam

Published Online: Dec 04, 2017

Page range: 168 - 176

Received: May 09, 2017

DOI: https://doi.org/10.21307/jofnem-2017-073

Keywords
carrot, molecular, morphology, new species, root–lession nematode, SEM, Vietnam.

© 2017 Thi Duyen Nguyen et al., published by Sciendo

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

Morphological and Molecular Characteristics of Pratylenchus haiduongensis sp. n., a New Species of Root–Lesion Nematodes Associated with Carrot in Vietnam

Published Online: Dec 04, 2017

Page range: 168 - 176

Received: May 09, 2017

DOI: https://doi.org/10.21307/jofnem-2017-073

Keywordscarrot, molecular, morphology, new species, root–lession nematode, SEM, Vietnam.

© 2017 Thi Duyen Nguyen et al., published by Sciendo

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

Keywords
carrot, molecular, morphology, new species, root–lession nematode, SEM, Vietnam.