A systematic hybridisation programme for improving pineapple was started at the MARDI Integrated Peat
Research Station in Pontian in 1984. Four cultivars representing the three major groups of pineapple i.e.,
Sarawak (Cayenne, Moris (Queen), Johor (Spanish) and Masmerah (Spanish) were crossed in a complete
diallel to generate about 50 000 F1 progenies. This hybrid population was evaluated and 300 selections were
subsequently made. These selections were further evaluated, trimmed down to 13 in 1989 and further reduced
to six in 1991. These six potential hybrids were tested over three environments i.e., Pontian, Bukit Tangga and
Kluang from 1991-1994, to establish the hybrids'performance and stability. The results of the trial showed
that one of the hybrids, A25-34, has good yield and its strong aroma and high, stable TSS % are suited for
table fruit. Further, its attractive fruit cosmetics, improved storage life and tolerance to black heart disorder
also make it a good candidate for export. This hybrid was named 'JOSAPINE' because it was derived from
'JOhore' and ,SArawak'parents and was officially released by MARDI on 5 August 1996