Figure 1:
Figure 2:
Figure 3:
Figure 4:
Figure 5:
Nematode samples used in this study_
| Population code | Collection date | Host plant | Coordinates |
|---|---|---|---|
| SG936 | July 27, 2016 | Rice | 36.902188, 126.661624 |
| SG153 | August 16, 2017 | Rice | 36.901005, 126.671008 |
Morphometrics of second-stage juveniles and cysts for the Heterodera sp_ of two populations SG153 and SG 936 as compared to H_ oryzae and H_ elachista in previous studies_
| Population | SG936, South Korea, This study | SG153, South Korea, This study | H. oryzae, Côte d’Ivoire, Nobbs et al. (1992) | H. elachista, Japan, Nobbs et al. (1992) | H. elachista, Iran, Tanha Maafi et al. (2004) |
|---|---|---|---|---|---|
| Cysts (n) | 13 | 25 | 50 | 50 | 39 |
| Length (excl. neck) | 498.9 ± 96.4 (307.0-617.2) | 523.3 ± 54.5 (438.9-643.3) | 714.8 ± 71.5 (442-999) | 446 ± 30.3 (328-557) | 431 ± 48 (340-586) |
| Width | 429.3 ± 97.3 (251.2-550.1) | 360.2 ± 47.2 (288.3-447.8) | 426.6 ± 53.8 (229-655) | 322.6 ± 26.0 (229-449) | 311 ± 48 (225-540) |
| Length/width | 1.2 ± 0.1 (1.0-1.4) | 1.5 ± 0.2 (1.3-1.8) | 1.71 ± 0.12 (1.1-2.3) | 1.4 ± 0.1 (1.1-1.9) | 1.4 ± 0.2 (1.1-1.9) |
| Vulval areas (n) | 11 | 16 | 10 | 10 | 10 |
| Fenestral length | 36.5 ± 4.7 (28.2-40.9) | 34.2 ± 4.9 (24.8-43.6) | 38.8 ± 1.85 (32-46) | 29.3 ± 2.0 (23.36) | 40 ± 6.5 (30-50) |
| Semifenestral width | 34.8 ± 4.4 (29.3-44.2) | 35.7 ± 4.4 (25.9-41.0) | 51.6 ± 5.20 (36-69) | 32.0 ± 2.5 (26-39) | 31.2 ± 4.7 (26-42) |
| Vulval slit length | 33.1 ± 5.0 (27.6-45.6) | 34.3 ± 3.8 (27.8-41.3) | 50.7 ± 4.0 (41-65) | 37.5 ± 2.8 (26-46) | 40 ± 3.8 (32-45) |
| Vulval bridge width | 9.0 ± 4.5 (4.4-17.9) | 7.2 ± 3.3 (4.0-15.0) | 12.14 ± 1.9 (6-16) | 5.8 ± 2.0 (2-16) | – |
| Underbridge length | 80.1 ± 7.2 (70.8-96.4) | 83.0 ± 7.9 (63.4-95.3) | 112.5 ± 9.0 (87-153) | 72.0 ± 2.9 (65-78) | 85 |
| Vulva to anus distance | 34.9 ± 3.0 (30.5-41.6) | 36.6 ± 5.9 (30.1-50.3) | – | – | – |
| J2 (n) | 11 | 11 | 20 | 20 | 10 |
| L | 450.6 ± 16.6 (414.7-478.6) | 472.4 ± 19.3 (433.1-495.1) | 554 ± 9.4 (523-589) | 402 ± 10.0 (377-450) | 391 ± 11 (372-410) |
| a | 23.4 ± 0.7 (22.4-24.6) | 23.3 ± 1.6 (20.1-25.9) | 34.0 ± 1.03 (30.1-39.3) | 24.6 ± 0.9 (21.3-28.1) | 22.5 ± 1.0 (20.8-24) |
| b | – | – | |||
| c | 6.8 ± 0.3 (6.3-7.4) | 6.8 ± 0.3 (6.3-7.2) | 9.4 ± 0.3 (8.6-10.7) | 7.0 ± 0.4 (5.4-8.4) | 6.7 ± 0.3 (5.9-7.2) |
| Stylet (S) | 21.1 ± 0.5 (20.4-22.4) | 21.1 ± 0.8 (19.5-22.6) | 20.5 ± 1.15 (16-25) | 19.2 ± 0.8 (16-21) | 20 ± 0.7 (18-21) |
| Labial region height | 4.7 ± 0.5 (3.8-5.4) | 4.7 ± 0.3 (4.3-5.3) | – | – | 3 |
| Labial region diam. | 9.0 ± 0.7 (7.8-10.1) | 9.1 ± 0.3 (8.7-9.6) | – | – | 7.8 ± 0.4 (7-8) |
| DGO | 7.3 ± 0.7 (6.5-8.4) | 6.0 ± 0.8 (4.9-7.7) | – | – | 5.2 ± 0.8 (4-7) |
| Anterior end to | |||||
| Excretory pore | 97.5 ± 4.8 (87.5-103.0) | 99.3 ± 6.6 (84.8-110.8) | – | – | 84 ± 2.8 (79-88) |
| Median bulb valve (MB) | 65.4 ± 2.7 (62.1-72.6) | 64.4 ± 2.2 (60.6-68.0) | – | – | 59 ± 3.6 (52-67) |
| Body diam. at | |||||
| Mid-body | 19.2 ± 0.8 (18.1-20.7) | 20.4 ± 1.9 (18.2-24.3) | 16.3 ± 0.43 (15-18) | – | 17.4 ± 0.8 (16-19) |
| Anus (BDA) | 12.6 ± 0.9 (11.7-14.5) | 13.3 ± 0.8 (12.0-14.6) | 12.3 ± 0.72 (10-15) | 11.4 ± 0.8 (10-13) | 10.2 ± 0.6 (9-11) |
| Hyaline region (H) | 36.9 ± 3.2 (29.3-41.0) | 35.8 ± 3.4 (31.6-42.4) | 32.8 ± 1.3 (26-44) | – | 32 ± 3.0 (25-39) |
| Tail length (Tl) | 66.9 ± 3.8 (60.5-73.4) | 69.6 ± 4.7 (60.6-78.9) | 58.8 ± 2.25 (49-66) | 57.8 ± 2.9 (47-70) | – |
| H/S | 1.7 ± 0.1 (1.4-1.9) | 1.7 ± 0.2 (1.4-2.0) | 1.6 ± 0.11 (1.4-2.2) | – | 1.6 ± 0.1 (1.3-1.9) |
| L/MB | 6.9 ± 0.2 (6.6-7.2) | 7.3 ± 0.3 (6.9-8.1) | – | – | 6.7 ± 0.4 (5.6-7.4) |
| Tl/H | 1.8 ± 0.2 (1.6-2.5) | 2.0 ± 0.1 (1.7-2.2) | – | – | – |