The genetics of non-virus vein-banding in aromatic pepper Capsicum annuum L.

Vein-banding is a genetically inherited trait controlled by one locus, Vb, which is expressed as a wave-like banding of the main and side veins of pepper leaves. It was studied as a morphological defect always present in the ‘Nsukka Yellow’ pepper, Capsicum annuum L., and was shown to be inherited as an incompletely dominant characteristic with an F₂ segregation ratio of 1:2:1. The F₁ population was uniformly mild in expression of the vein-handing characteristic of the parent ‘Nsukka Yellow’ pepper. VbVb was designated as the genetic constitution of severe vein-banding, and vbvb as a normal genotype, the F₁ being Vbvb. A selection of normal plants from the back-cross with the normal-leafed parent yield a stable normal-leafed strain of ‘Nsukka Yellow’ christened ‘UN-Yellow’.