incognita in cowpea, and that geographic origin of germplasm was not linked to sources of resistance. These results demonstrate the greater virulence of M. enterolobii based on gall score (≤3) and RI (25 ≤ RI ≤ 50), respectively. incognita screening, 86.1% of accessions showed some level of resistance based on gall score (≤3), and 77.7% based on reproduction index (RI) (25 ≤ RI ≤ 50), whereas only 10.4% and 29.8% of accessions were resistant to M. Both screenings showed significant genotypic variation and medium/high broad-sense heritability ( H 2) estimates for most traits, and several traits were also strongly correlated. enterolobii Yang and Eisenback to verify the potential of this collection to be used for improving RKN resistance in cowpeas. Thus, we screened the University of California, Riverside (UC-Riverside), cowpea mini-core collection for resistance to Meloidogyne incognita Kofoid and White (Chitwood) and M. However, root-knot nematodes (RKNs) ( Meloidogyne spp.) represent a threat to cowpea production worldwide. In developing countries, cowpea is exploited as a dual-purpose crop for its grain and fodder it is cultivated primarily for grain and as a cover crop in industrialized countries. Cowpea is a multipurpose crop that provides nutrients for human and livestock diets, as well as regulates and supports ecosystem services.
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