“…The hierarchical cluster based on pollen quantity and germination rate showed that 65 litchi cultivars could be classified into six clusters, and 41.54% of litchi cultivars ranged between 3830 and 4730 pollen grains per anther. The number of pollen grains per anther ranged between 1170 and 3800 in 18 apple cultivars grown under subtropical conditions in São Paulo, Brazil, and the pollen grains per flower ranged between 23,000 and 74,000 (Campo Dall'Orto et al, 1985). On an average, Brazilian apple cultivars, such as Baronesa, Suprema, Imperatriz, Lisgala, Joaquina, Princesa, Fred Hough, Daiane, Catarina, Primícia, Duquesa and Condessa produce 16-20 anthers, and a variable number of pollen grains per flower ranging between 53,000 and 103,700 were found.…”