Pratylenchus smoliki , a new nematode species (Pratylenchidae: Tylenchomorpha) from the Great Plains region of North America
Makaleler > Tam Makale · 2021
Yazarlar: Thomas Powers, Timothy Todd, Tim Harris, Rebecca Higgins, Ann MacGuidwin, Peter Mullin, Mehmet Ozbayrak, Kirsten Powers, Kanan Sakai
Journal of Nematology, Uluslararası, Wos, 2021, cilt 53, ss 1-23
Özet
Abstract Pratylenchus smoliki is a new species of root-lesion nematode described from corn-soybean production fields in the Central Great Plains of North America. It is characterized by populations with relatively abundant males, two lip annuli, females with a round functional spermatheca and a conoid to subcylindrical tail with a non-crenate, smooth terminus. In host preference tests, corn and wheat produce the largest nematode populations, whereas sorghum and soybeans produce less than 20% the numbers observed on corn. Scanning electron microscopy reveals that the en face patterns compare to those seen in Pratylenchus pseudocoffeae , P . scribneri, P. hexincisus , and P. alleni. The pattern is described as rectangular to trapezoidal subdorsal and subventral lips adjoining oral disc, but with a clear demarcation between the oral disc and the subdorsal and subventral sectors. A Maximum Likelihood COI tree recognizes P . smoliki as a moderately-well-supported clade with several haplotype subgroups. A Maximum Likelihood partial 28S tree provides strong support for the P. smoliki clade and reinforces the close relationships between species with similar en face patterns. Topotype specimens of P . alleni were demonstrably different from P. smoliki using DNA markers. The geographic range of P. smoliki overlaps with the ranges of P. alleni , P. scribneri , P. neglectus , P . hexicisus , and P. dakotaensis . The observed host range (corn, rye, sunflower, and wheat) suggests that P. smoliki may be native to the tallgrass prairie region of the Great Plains.