Etude de la fertilite femelle de cinq clones cultives D'<i>hevea brasiliensis</i> muell arg. (Euphorbiacee), en C&#244 D'Ivoire

Abstract

After 15 years of manual pollination in Côte d'Ivoire, female fertility of Hevea brasiliensis rubber tree clones was assessed from 3 estimators of fertility, which were the aborted seed, was studied in 5 wickham clones, using a discriminate factor analysis. The PB5/51, PB260 and PB235 clones, which were good seeders, had high initial and final fruit set average rates (11.23 to 15.17 % and 7.09 to 9.13 %), with the highest average rates of aborted seeds (31.72 to 55.91 %). These were, either lower, or higher (18.86 to 41.84 %) for the GT1 and AVROS2037 clones, which were found to be bad seeders. Overall, the study showed a better understanding of the low fertility of the Hevea brasiliensis rubber tree through the identification of good (PB5/ 51, PB 260, PB 235) and bad seeders (GT 1, AVROS 2037).