Allelism Test between Crosses of High-O/L x High-O/L and Very High-O/L x Very High-O/L Peanut Genotypes

Abstract

Crosses were made between High-O/L x High-O/L and between Very High-O/L x Very High-O/L peanut genotypes. The High-O/L parental genotypes were F435-OL-2 and ‘Flavor Runner 458’ and ranged between 20 and 40:1 oleic (O) to linoleic (L) fatty acid methyl ester ratio. The Very High-O/L parental cultivars were ‘Georgia Hi-O/L' and ‘Georgia-11J' and consistently had O/L ratios ≥40:1 over four years at the Tifton, Georgia location when grown under maximum-input production practices with irrigation. F1 plants from the High-O/L x High-O/L cross combination had an average O/L ratio of 32.5:1; whereas, the F1 plants from the Very High-O/L x Very High-O/L crosses had an average O/L ratio of 50:1. Average O/L ratios of both F2 and F3 generation progeny also had similar O/L ratios within High-O/L x High-O/L and Very High-O/L x Very High-O/L crosses. The results from these test crosses suggest that there are at least two different high-oleic genotypes possibly associated with either multiple alleles or modifier genes.