Greener Journal of Agricultural Sciences

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Koffi et al

Greener Journal of Agricultural Sciences Vol. 6 (4), pp. 134-144, April 2016.

 ISSN: 2276-7770 © 2015 Greener Journals

Research Paper

Manuscript Number: 020416032


(DOI: http://doi.org/10.15580/GJAS.2016.4.020416032)

 

Morphological Diversity among 18 Genitors of Vanuatu Tall (VTT) Coconut (Cocos nucifera L.) Population used in Crosses for Hybrids Resistant to Lethal Yellowing Disease Selection at Port-Bouët, Côte d’Ivoire

 

Koffi Eric-BZ*1,2, Yao SDM3, Sie RS1, Konan KJL2, Koffi Y1,2,

Doh F1,2, Issali AE2, Allou K2

 

1UFR Sciences de la Nature, Nangui Abrogoua University, 02 BP 801 Abidjan 02, Côte d'Ivoire.

2Marc Delorme Research Station, CNRA, 07 BP 13 Abidjan 07, Côte d’Ivoire.

3UFR des Sciences Biologiques, Peleforo Gon Coulibaly University, BP 1328 Korhogo, Côte d’Ivoire.

Abstract


Genetic control by creation of the coconut varieties expressing both Lethal Yellowing (LY) disease resistance and good agronomic performances led breeders to select in Tall populations which contain large diversity, some peculiar palms used as genitors. Thus, 18 genotypes of Vanuatu Tall (VTT) coded from G1 to G18 were described from 30 quantitative descriptors assessed on the coconut organs that are stem, leaf, inflorescence and fruit. The results showed that these 18 VTT genotypes were divided into two agro-morphological clusters: (i) genotypes providing large nuts with heavy components and (ii) the genotypes characterized by small fruit with weak component weights. Therefore, the genotypes that belong to first cluster G1, G4, G6, G7, G8, G9, G11, G13, G14, G16, G17 and specially G15 which also exhibited a vegetative robustness. could be selected as parent palms and involved in crosses with Dwarf or Tall coconut populations to develop hybrids that are potentially resistant to LY disease and producing large fruits with heavy components.

 

Keywords: Coconut palms, genitor VTT, genotype, morphological trait, Lethal Yellowing (LY) disease, selection, Côte d’Ivoire.

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