Registration of aphid?resistant ‘California Blackeye 77’ cowpea

‘California Blackeye 77’ (CB77) (Reg. no. CV-344, PI 698656) is a blackeye-type cowpea [Vigna unguiculata (L.) Walp] cultivar developed by the University of California, Riverside. CB77 distinguished from industry standard cultivars, 46’ (CB46) and 5’ (CB5), its ability to resist infestation caused aphid (Aphis craccivora Koch), destructive sap-sucking insect pest prevalent in Central Valley California warm-to-hot regions worldwide. was introgression two known quantitative trait loci for resistance African breeding line IT97K-556-6 into CB46 through marker-assisted backcrossing. Genotyping with 51,128 single nucleotide polymorphism markers reveals that near-isogenic carries haplotypes (?4 Mb total) IT97K-556-6. On-station on-farm trials infestations confirmed inherent (aphids covered 0–10% plant surface area without causing any crown damage, whereas check had aphids covering 60–70% severe damage). Under protected conditions, showed grain yield, seed quality, other agronomic characteristics equivalent better yield than CB5. could therefore be substituted CB5 production where are present. The pair also useful materials gene discovery.