02550naa a2200289 a 450000100080000000500110000800800410001902400520006010000200011224501500013226000090028252016630029165000230195465000110197765000240198870000170201270000200202970000190204970000190206870000190208770000180210670000250212470000260214970000200217570000170219577300480221221774132025-07-21       2025    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1007/s40858-025-00751-y2DOI1 aPINTO, T. J. B.  aSources of resistance to Meloidogyne incognita in a diverse Capsicum chinense germplasm collection from the Amazon region.h[electronic resource]  c2025  aMeloidogyne incognita is one of the most important root-knot nematode species, causing significant yield losses in hot and sweet peppers (Capsicum spp.) worldwide. The employment of resistant cultivars is one of the most efficient and sustainable management strategies for this pathogen. However, there is a limited amount of data available on sources of resistance to M. incognita in Capsicum chinense germplasm. Herein, we evaluated the reaction to M. incognita of a genetically diverse C. chinense germplasm (collected in the Brazilian Amazon Basin), searching for useful sources of genetic resistance. Forty C. chinense accessions and two tomato controls were evaluated in two experiments conducted under greenhouse conditions. Individual plants were inoculated with a suspension containing 5000 eggs+second-stage juveniles (J2). Evaluations were carried out 60 days after inoculation according to the following criteria: egg mass index (EMI), gall index (GI), number of eggs and J2 per gram of roots (NR), the reproduction factor (RF), and the reproduction index (RI). Accessions exhibited varying types of reactions to M. incognita. New sources of resistance to M. incognita were identified in the accessions ‘CNPH 15348’, ‘CNPH 60087’, ‘CNPH 55001’, ‘CNPH 60090’, ‘CNPH 15749’, and the Brazilian cultivar ‘BRS Nandaia’. Thus far, sources of genetic resistance to Meloidogyne species in Capsicum species were identified mainly in C. annuum accessions. Hence, this subgroup of C. chinense accessions might represent potential sources of novel resistance genes/alleles, expanding the genetic basis of this relevant breeding trait.  aGenetic resistance  aPepper  aRoot-knot nematodes1 aCUNHA, D. F.1 aSILVA, G. O. da1 aBOITEUX, L. S.1 aRAGASSI, C. F.1 aCORREIA, V. R.1 aRAFAEL, F. S.1 aRIBEIRO, C. S. da C.1 aCARVALHO, S. I. C. de1 aPINHEIRO, J. B.1 aCARES, J. E.  tTropical Plant Pathologygv. 50, Jul. 2025.