Self-Incompatibility in Pineapple

In an attempt to determine the genotype and number of alleles responsible for self-incompatibility in two commercial varieties of p'neapple ‘Kew’ and ‘Queen’ grown in India, 406 artificial cross-pollinations in all possible combinations using ‘Kew’, ‘Queen’, (Kew x Queen) and (Queen x Kew) as well as 316 artificial self-pollinations and backcrosses among themselves as male and female parents were made. Self-incompatibility in these two p'neapple varieties was based on the gametophytic ‘S’ allele system ‘Kew’ was assigned the genotype S_aS_a and ‘Queen’ S_b Sb.