Submitted to: HortScience
Publication Type: Abstract Only
Publication Acceptance Date: April 17, 1995
Publication Date: N/A
Populations of wild Carica papaya, previously designated as Carica peltata, were sampled from its native range on the Caribbean coast of Central America (Mexico, Belize, Guatemala, Honduras) and cultivated Carica papaya from both Central and South America were examined for isozyme variability. Thirteen loci from nine enzyme systems (Pgm, Pgi, Idh, Mdh, 6Pgd, Ugpp, Skdh, Aco, Tpi) were scored for all populations. Ten loci were polymorphic and a total of 31 alleles were detected. Isozyme genotypes as determined through segregation analysis were used in the genetic interpretation for eight loci and eighteen alleles while six additional loci and thirteen alleles were postulated on the basis of phenotypic variation found throughout the species. Nei's genetic identity, I, for both cultivated and wild Carica papaya was greater than 0.9 which is consistent with nonspecific populations. Wild papaya populations from different geo- graphic areas appear more related to one another than to domesticates in the same geographic region.