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Solanum palinacanthum : broad‐spectrum resistance to root‐knot nematodes ( Meloidogyne spp.)
Author(s) -
Murata Gaku,
Uesugi Kenta,
Uehara Taketo,
Kumaishi Kie,
Ichihashi Yasunori,
Saito Takeo,
Shinmura Yoshimi
Publication year - 2020
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.5942
Subject(s) - solanum , terra incognita , biology , melongena , meloidogyne incognita , meloidogyne arenaria , inoculation , nematode , horticulture , pest analysis , biological pest control , botany , agronomy , ecology
BACKGROUND Root‐knot nematodes (RKN, Meloidogyne spp.) are harmful phytophagous pests of Solanum spp. Some RKN species are becoming worldwide problems because of their virulence to RKN‐resistant Solanum species. A new Solanum species carrying broad‐spectrum resistance to Meloidogyne spp. is required for the effective management of this pest. Here we sought to determine the host suitability of RKN to Solanum palinacanthum , a wild Solanum species, and to evaluate its potential effectiveness in RKN management. RESULTS We identified an RKN‐resistant Solanum species, S. palinacanthum , by screening Solanum accessions. We tested its spectrum of resistance to common Meloidogyne spp. in Japan. In pot tests inoculated with second‐stage juveniles, S. palinacanthum showed poor host suitability for Melidogyne incognita , M. arenaria genotypes A2‐J and A2‐O, M. javanica and M. hapla , indicating broad‐spectrum resistance to RKN. The development of M. incognita within S. palinacanthum roots was significantly poorer than that in susceptible S. melongena and S. lycopersicum at 10 and 21 days after inoculation. Microplot tests confirmed that the number of second‐stage juveniles in plots where S. palinacanthum grew and root galling of the root system were significantly lower than those of susceptible S. melongena , suggesting that the resistance could be used to manage RKN under field conditions. CONCLUSION S. palinacanthum showed poor host suitability to all Meloidogyne spp. tested in this study, and it thus has the potential to be used as a genetic resource with broad‐spectrum RKN resistance, and it could be effective against multiple RKN species in a field. © 2020 Society of Chemical Industry