Effect of fruit set on fructification of coconut tall ecotypes for production of hybrid seednuts in Cote D'Ivoire

  • AE Issali
  • TT Lekadou
  • AEB Nguessan
  • JL Konan
  • K Allou
  • A Adiko

Abstract

To assess the effect of coconut fruit set on the variation expression of the number of nuts yielded at the end of the fructification, a modelling approach was used. Four female parents namely Kar Kar Tall (KKT), Kappadam Tall (KPD), Sri Lanka Tall (SLT) and Vanuatu Tall (VTT) as well as four male parents known as Panama Aguadulce Tall (PNT01), Rennell Island Tall (RIT), Tagnanan Tall (TAG) and West African Tall (WAT) were involved in six crosses. The WAT was used as a control. Results showed that fruit set and fructification was female genotype and crossing-independent. Thus, the four female genotypes can be indifferently used in crossings to produce seednuts. In contrast, pollen age discriminated the male parents into two groups, especially 1) PNT01, TAG and 2) WAT and RIT. Nevertheless, the two latter male parents WAT and RIT, having provided the oldest pollen, did not induce significant differences among crosses. Fruit set explained 83.70% fluctuations of the fructification. Hence, it exerted a significant effect on the fructification variation expression. In Côte d’Ivoire, we could predict the seednuts production coming to maturity from the fruit set using the equation Nut = 0.006 + 0.774*Setfruit.

Keywords: Cocos nucifera, modelling, pollen age

African Crop Science Journal, Vol. 21, No. 4, pp. 303 - 310

Author Biographies

AE Issali
Station Cocotier Port Bouët Marc Delorme, CNRA, 07 BP 13 Abidjan 07, Côte d’Ivoire
TT Lekadou
Station Cocotier Port Bouët Marc Delorme, CNRA, 07 BP 13 Abidjan 07, Côte d’Ivoire
AEB Nguessan
Direction Régionale de Korhogho du CNRA, BP 856 Korhogo, Côte d’Ivoire
JL Konan
Station Cocotier Port Bouët Marc Delorme, CNRA, 07 BP 13 Abidjan 07, Côte d’Ivoire
K Allou
Station Cocotier Port Bouët Marc Delorme, CNRA, 07 BP 13 Abidjan 07, Côte d’Ivoire
A Adiko
Conseil Scientifique, Chargé de la Coopération Internationale du CNRA. 01 BP 1740. Direction Générale du CNRA. Km 17, route de Dabou, Côte d’Ivoire
Published
2013-10-15
Section
Articles

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eISSN: 2072-6589
print ISSN: 1021-9730