Greener Journal of Biological Sciences Vol. 3 (3), pp. 127-135, April 2013.
© 2011 Greener Journals
Manuscript Number: 022313492
Self-fertility of four female parent clones ofAnanas comosus L., involved in a 6x6 complete diallel mating system with selfings using the typological approach
Issali A.E.1*, Nguessan Angelo E.B.2, Mpika J.3, Adiko Amoncho4, Sangare A.5, Saraka D.M.6, Deffan Zranseu A.B.7
1,6,7 Station de Recherche sur le Cocotier Port Bouët Marc Delorme. CNRA. 07 BP 13 Abidjan 07. Côte d’Ivoire.
2 Coordonateur scientifique à la Direction Régionale d’Abidjan du CNRA. 19, 21 Rue Jean Mermoz. 08 BP 33 Abidjan 08. Tel : 225 22 44 28 58 / 225 22 44 21 08.
3 Station de Recherche CNRA de Bimbresso, 01 BP 1563 Abidjan 01.
4 Directeur des Programmes de Recherche et de l’Appui au Développement du CNRA. 01 BP 1740 Abidjan 01.
1*Corresponding Author’s Email: issaliemma @ yahoo. com
To determine the cropping system that applies to four clones of Ananas comosus in on-farm trials, their behaviour under hand selfings was analysed on-station. Hybrid female clones 103-104-6, 410-106-33, 410-200-15 and Queen Victoria clone RE43 as well as clones HA10 and HA25 as controls were involved in a 6 x 6 complete diallel crossing system with selfings. The total seeds number derived from hand self-pollinations per week, mean seeds number obtained per self-pollinated flower per week, ripe fruit weight and bloomed flowers number per week were measured. The Anova, Principal Component Analysis (PCA) and Hierarchical Cluster Analysis (HCA) were successively run. Results showed that 410-200-15 revealed self-incompatibility, while RE43 is found to be self-sterile. In the same way, 410-106-33 expresses self-sterile behaviour, whereas 103-104-6 showed more self-fertile characteristics. The behaviour under selfings of both clones 410-200-15 and 410-106-33 comes from their Smooth Cayenne female parent HA10 which was previously characterised as self-incompatible. The structurings provided by the Anova and HCA was globally comparable. The hybrid clone 410-200-15 can already subject to on-farm trials via single or mixed crop before authorising its popularisation. The clones 410-106-33 and 103-104-6 must be first subjected to successive back crosses before on-farm trials then their popularisation. The RE43 clone must be cultivated in on-farm trials via single crop. The morphological relatedness of four clones was discussed.
Keywords: Hybrid clones, hand self-pollinations, self-compatibility, self-sterility, relatedness among groups, Côte d’Ivoire.