Effects of interspecific hybridization and number of vector insect species on invasion and genetic structure of entomophilic nematodes

入侵线虫害虫松材线虫与近缘原生线虫B的种间杂交mucronatus表明B. mucronatus基因渗入到B中。而与致病性和寄生于昆虫载体的能力有关的基因位于核基因组上。有没有显着差异的内在自然增长率或寄宿能力之间的一些杂交衍生的人口和一个或两个父母的人口，这表明这种杂交衍生的人口能够坚持在该领域。现场调查和DNA分析表明，两种媒介天牛没有将锥尾伞滑刃线虫种群分成两个遗传上不同的亚群。

Interspecific hybridization between the invasive nematode pest Bursaphelenchus xylophilus and its closely-related, native nematode B. mucronatus showed that B. mucronatus genes introgressed into B. xylophilus genome and that genes responsible for the pathogenicity and ability to board insect vectors were on the nuclear genome. There were no significant difference in the intrinsic rate of natural increase or boarding ability between some hybrid-derived populations and one or two parent populations, suggesting that such hybrid-derived populations were able to persist in the field. Field survey and DNA analysis showed that the two cerambycid species of vectors did not separate Bursaphelenchus conicaudatus populations into two genetically different subpopulations.