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Two isogenic sets of bell pepper ( Capsicum annuum  L.) lines (differing at the  N  root-knot nematode resistance locus) were characterized for resistance to  Meloidogyne arenaria  (Neal) Chitwood races 1 and 2,  M. hapla  Chitwood, and  M. javanica  (Treub) Chitwood in greenhouse and growth chamber tests .  The isogenic sets of  C. annuum  were `Charleston Belle' ( NN ) and `Keystone Resistant Giant' ( nn -recurrent parent), and `Carolina Wonder' ( NN ) and `Yolo Wonder B' ( nn -recurrent parent).  Meloidogyne arenaria  race 1 is pathogenic to  C. annuum . `Charleston Belle' and `Carolina Wonder' exhibited high resistance to  M. arenaria  race 1. Their respective recurrent backcross parents, `Keystone Resistant Giant' and `Yolo Wonder B', were susceptible to  M. arenaria .  Meloidogyne arenaria  race 2 and  M. javanica  are not highly pathogenic to pepper. However, `Charleston Belle' and `Carolina Wonder' both exhibited higher ( P ≤0.05) resistance to  M. arenaria  race 2 and  M. javanica  than `Keystone Resistant Giant' and `Yolo Wonder B'.  Meloidogyne hapla  is pathogenic to pepper. Both `Charleston Belle' and `Carolina Wonder' and their respective recurrent parents, `Keystone Resistant Giant' and `Yolo Wonder B', were susceptible to  M. hapla . We concluded that the  N  gene confers resistance to  M. arenaria  races 1 and 2, and  M. javanica  in  C. annuum , but the  N  gene does not condition resistance to  M. hapla.

journal of the american society for horticultural science

Characterization of Resistance Conferred by the N gene to Meloidogyne arenaria Races 1 and 2, M. hapla, and M. javanica in Two Sets of Isogenic Lines of Capsicum annuum L.