The global market for mangoes is potentially very lucrative, and mango producers are keen to exploit the fruit's growing popularity. Modern shoppers appreciate the fruit'a high nutritional value (the mango is a good source of vitamins A and C, protein, fructose and fibre), but also expect it to look and taste perfect. Unfortunately for producers, the seedlings of mangoes are extremely variable in quality, and many have to be rejected as below the standard required for propagation. For mass-cultivation, producers now select only the best quality seedlings which have the most chance of developing into good quality fruit.