ISHS Acta Horticulturae 425: II International Pineapple Symposium
USING INCOMPATIBILITY ALLELES AS GENETIC MARKERS TO IDENTIFY PINEAPPLE VARIETIES |
| Authors: | G. Coppens d'Eeckenbrugge, B. Bernasconi, B. Messiaen, M.F. Duval |
| Abstract:
The possibility of using sexual incompatibility between genotypes to complement morphological analysis in variety identification has been tested on two heterogenous sets of clones, initially classified as ‘Spanish’ and ‘Pernambuco’. Self- and cross-pollen tube growth were studied from a diallel cross in each group. Among 13 ‘Spanish’ clones, the morphological classification was confirmed and simplified. Three incompatibility genotypes corresponding to the ‘Red Spanish’ and ‘Singapore Spanish’ varieties and to a third variety were found. Among nine ‘Pernambuco’ clones, five incompatibility groups were found, confirming the heterogeneity of this set. These genotypes were cross-compatible with a tester from ‘Queen’ variety, indicating that they were genetically distinct from the latter despite its morphological similarity with the yellow-fleshed ‘Pernambuco’ clones. Incompatibility alleles are easy to use in the absence of pseudo-compatibility although pollen tube observation requires some experience. They may be useful genetic markers when no other markers are available. | |
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