Improvement of jackfruit (Artocarpus heterophyllus Lam.) through selection.
Fruits from various genotypes were collected in the course of surveys of jackfruit growing regions, particularly in eastern Uttar Pradesh, from November 1989 to August 1990. On the basis of fruit morphology, the genotypes were grouped into 9 categories. Wide variation was observed in number, shape, colour, size and rind thickness of fruits. Average fruit weight ranged from 6.6 to 18.8 kg and the average number of fruits per tree from 12 to 212. All genotypes matured in July-August except one genotype which matured March-May. There was also variability in chemical composition of the pulp, with total soluble solids ranging from 14 to 20.5% and ascorbic acid content from 23.8 to 32.9 mg/100 g. The best genotype was considered to be 7, with moderate yields, large fruits (>15 kg) and bulbs (about 20 g), small cylinders, high pulp/cylinder ratio and average fruit quality.