Etude de la fertilite femelle de cinq clones cultives D'hevea brasiliensis muell arg. (Euphorbiacee), en Cô 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).