New Cyst Nematode,Heterodera sojaen. sp. (Nematoda: Heteroderidae) from Soybean in Korea.
A new soybean cyst nematodeHeterodera sojaen. sp. was found from the roots of soybean plants in Korea. Cysts ofH. sojaen. sp. appeared more round, shining, and darker than that ofH. glycines. Morphologically,H. sojaen. sp. differed fromH. glycinesby fenestra length (23.5-54.2 µm vs. 30-70 µm), vulval silt length (9.0-24.4 µm vs. 43-60 µm), tail length of J2 (54.3-74.8 µm vs. 40-61 µm), and hyaline part of J2 (32.6-46.3 µm vs. 20-30 µm). It is distinguished fromH. elachistaby larger cyst (513.4-778.3 µm × 343.4-567.1 µm vs. 350-560 µm × 250-450 µm) and longer stylet length of J2 (23.8-25.3 µm vs. 17-19 µm). Molecular analysis of rRNA large subunit (LSU) D2-D3 segments and ITS gene sequence shows thatH. sojaen. sp. is more close to rice cyst nematodeH. elachistathanH. glycines.Heterodera sojaen. sp. was widely distributed in Korea. It was found from soybean fields of all three provinces sampled.
Department of Plant Bioscience, College of Natural Resource and Life Sciences, Pusan National University, Miryang 50463, Korea.
Heonil
H
Kang
Department of Plant Bioscience, College of Natural Resource and Life Sciences, Pusan National University, Miryang 50463, Korea.
Geun
G
Eun
Department of Plant Bioscience, College of Natural Resource and Life Sciences, Pusan National University, Miryang 50463, Korea.
Jihye
J
Ha
Department of Plant Bioscience, College of Natural Resource and Life Sciences, Pusan National University, Miryang 50463, Korea.; Nematode Research Center, Life and Industry Convergence Research Institute, Pusan National University, Miryang 50463, Korea.
Yongchul
Y
Kim
Nematode Research Center, Life and Industry Convergence Research Institute, Pusan National University, Miryang 50463, Korea.
Namsook
N
Park
Nematode Research Center, Life and Industry Convergence Research Institute, Pusan National University, Miryang 50463, Korea.
Donggeun
D
Kim
Department of Plant Bioscience, College of Natural Resource and Life Sciences, Pusan National University, Miryang 50463, Korea.; Nematode Research Center, Life and Industry Convergence Research Institute, Pusan National University, Miryang 50463, Korea.
Insoo
I
Choi
Heterodera sojae n. sp.; morphology; phylogenetic; soybean; taxonomy