Characterization of Host Specificity and Reproductive Compatibility Among Different Isolates of Belonolaimus longicaudatus in Southeastern United States

미국 동남부지역에 분포하는 Belonolaimus longicaudatus 개체군들간의 기주특이성과 생식교합능력 비교

Five isolates of Belonolaimus longicaudatus collected from different geographical locations and hosts in southeastern United Stated were tested to determine their host specificity and reproductive compatibility. Both the Georgia and Lake Alfred isolates reproduced well on cotton, bermudagrass, and citrus. On the other hand, the North Carolina and Gainesville isolates reproduced poorly on all crops. The Hastings isolate reproduced well on cotton and potato. The Lake Alfred and Hastings isolates showed greater host specificity to their original host of citrus and potato, respectively. Except for the Hastings isolate, all isolates reproduced poorly on potato, which clearly differentiated the Hastings isolate from others (P>0.05). Hybridization test presented reproductive compatibility among five different isolates of B. longicaudatus by generating F$_1$ offspring. The Gainesville males showed comparatively poor ability to fertilize other females and generated a lower number of offspring. In contrast, the North Carolina males were attracted by all the other isolates of sting nematode, and produced the highest number of juveniles.