Abstract
The development of a papaya cultivar for unripe or green consumption that has resistance to papaya ringspot virus (PRSV) began in 2004 by crossing red-fleshed ‘Red Krang’ cultivar with yellow-fleshed Sai Nampeung cultivar. Numerous diverse hybrids that were obtained were selected in a recurrent selection until 2010. The ’Yellow Krang’ line was selected because of the early and high yielding, elongated fruit shape, is yellow and crispy flesh when unripe and suitable for consumption as green papaya, and tolerance to PRSV. From 2010 to 2015 the ‘Yellow Krang’ line was refined through pure line selection. It was evaluated in four growing areas in Thailand for 3 years. The field trial showed that ‘Yellow Krang’ can be classified as dwarf, reaching a height of 110-150 cm, early bearing, with mean 105 days to first flower anthesis; an average of 100 flowers and 206 fruits per plant, mean fruit weight 1.2 kg, mean fruit thickness 2.4 cm, mean fruit firmness 7.15 Newtons; high yielding, with mean fresh weight yield of 134.606 kg/hectare; and 24.86% incidence of PRSV.