The taxonomic status of Aphelenchoides besseyi Christie, 1942 (Nematoda: Aphelenchoididae) populations from the southeastern USA, and description of Aphelenchoides pseudobesseyi sp. n.
POB 110620;
Dept Entomol & Nematol;
Baton Rouge;
Gainesville;
Louisiana State Univ;
Dept Plant Pathol & Crop Physiol;
Madrid 28933;
Florida Dept Agr & Consumer Serv;
DPI;
Fis & Quim Inorgan;
Calif Dept Food & Agr;
GCREC;
LA 70803 USA;
Wimauma;
FL 32614 USA;
Nematol Sect;
Agr Ctr;
Univ Florida;
FL 33598 USA;
Campus Mostoles;
Spain;
Sacramento;
POB 147100;
Univ Rey Juan Carlos;
CA 95832 USA;
FL 32611 USA;
Dept Biol & Geol;
Louisiana Agr Expt Stn;
Plant Pest Diagnost Ctr;
USDA APHIS PPQ CAPS;
关键词：
morphology;
Farfugium japonicum;
taxonomy;
cryptic species;
Dryopteris erythrosora;
Echinacea sp.;
summer crimp nematode;
Oryza sativa;
phylogenetic analysis;
rice white tip nematode;
Fragaria x Ananassa;
Aphelenchoides oryzae;
molecular analysis;
期刊名称：
Nematology
i s s n：
1388-5545
年卷期：
2021 年
23 卷
Pt.4 期
页 码：
381-413
页 码：
摘 要：
Populations reviously identified as Aphelenchoides besseyi were studied. Using an integrated approach, the A. besseyi species complex contains several cryptic species: A. besseyi sensu stricto, A. oryzae, A. pseudobesseyi sp. n. and other putative undescribed species. A population from Florida strawberry morphologically fits the A. besseyi of both Christie and Allen and is considered the only representative of this species. A Louisiana rice population fitted the descriptions of A. oryzae of both Yokoo and Fortuner; PUS length was consistently less than one-third of VA. Aphelenchoides oryzae, parasitising rice and other monocots, was re-established based on morphological and molecular datasets. Three populations from Florida ornamental plants (Dryopteris erythrosora, Echinacea sp. and Farfugium japonicum) differed from those of the two above-mentioned species and are described as A. pseudobesseyi sp. n. Populations previously identified as 'A. besseyi' from several countries were considered representatives of this new species, which usually had a large and conspicuous PUS, 8-14 mu m wide and with a length greater than one-third of VA in 40-70% of studied specimens. Morphological variability made separation of A. pseudobesseyi sp. n. from A. oryzae and A. besseyi unreliable without the examination of numerous specimens and molecular analysis.
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