Assessment of Host-Induced Selection on Three Geographic Isolates of Heterodera schachtii Using RAPD and AFLP Markers.

摘要: ABSTRACT The hypothesis that host plants exert selection pressure on Heterodera schachtii populations was tested. Host of genotypes from three genetically distinct isolates H. assessed using cabbage, sugar beet, oilseed radish (Raphanus sativus), and white mustard (Sinapis alba). represent a range susceptibility to included R. sativus S. alba, because cultivars those species have been used as trap crops for in Europe. Genotypic differences amplified fragment length polymorphism (AFLP) random polymorphic DNA (RAPD) markers were detected among the after they reproduced different hosts. poorest plant, sativus, resulted greatest number changes both AFLP RAPD markers. Oilseed selected nematode less than four generations. population by analyses observed even transferred back other genetic influenced original isolates. results indicate utility RAPDs AFLPs identifying monitoring intraspecific variability nematodes understanding responses plants. Nematode management practices such resistant may alter gene frequencies, thereby reducing efficacy tactic exacerbating nematode's potential damage subsequent crops.