Sweetpotato [<i>Ipomoea batatas</i> (<i>L</i>.) Lam] genetic incompatibility effects in true hybrids seeds for new farmer cultivars development

Introduction Sweetpotato is a vegetatively propagated, highly heterozygous and outcrossing crop. Genetic improvement of sweetpotato complicated because the hexaploid nature The objective this study was to assess genetic compatibility between accessions collected from Niger Nigeria select best parents for next hybridisation block develop new farmer varieties. Materials Methods experiment conducted at field department crop production landscape management, Ebonyi State University, Abakaliki, Nigeria. crossing established using diallel mating design method three cross 13 genotypes. Results revealed very significant difference (χ2 = 48.32; p < 0.001) successful rates. Complete incompatibility both direct reciprocal crosses obtained two while, partial observed in 25 (16.02%). Successful rate varied 14.82% 43.58% with grand mean 28.04%. number seeds per capsule families ranged 0.73% 1.57% 1.05. Germination 22.92% 75.90% 45.91%. Conclusion Clones AYT/19/05, TIS-81-64 Umu SPO1 had high they can be used as block.