Chlorina, a New Chlorophyll-Deficient Character in Groundnut

The occurrence and the segregation pattern of the chlorina character confirmed recessive digenic control. Based on independent segregation of the duplicate chlorina factors, gene symbols cl₁ and cl₂ are proposed. Accordingly the following genetic constitutions of the parents used in the crosses are given.

Krinkle mutant: KrKrVVCl₁Cl₁cl₂cl₂; Spanish Improved: krkrVV-cl₁cl₁Cl₂Cl₂; Virescent mutant: krkrvvcl₁cl₁Cl₂Cl₂; Chlorina: krkrVVcl₁-cl₁cl₂cl₂; Krinkle-chlorina: KrKrVVcl₁cl₁cl₂cl₂.

There are at least three major genes, V, Cl₁ and Cl₂ controlling the development of chlorophyll in groundnut. They are non-allelic and do not show linkage. The chlorophyll deficiency resulting from homozygous recessive condition at all the three loci, results in seedling lethality.