Abstract
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
Highlights
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
The results showed that these 18 Vanuatu Tall (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
Genotype G15 has the most values of stem height (SH = 14.77 m), stem girth at 20 cm above soil level (C20 = 221.67 cm) and stem girth at 1.5 m height (C150 = 107.67 cm) (Table 2)
Summary
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. VTT have a bad agronomic performances (small fruit size, low fruit weight and coprah yield) (Bourdeix et al, 2005, Konan and Allou, 2006) To improve this coconut cultivar and vary LY disease resistance sources, CNRA decided to select the best individuals VTT to create together resistant hybrids with high yields. The objective of this study was to know some morphological and agronomical characteristics of 18 best genotypes VTT selected as genitors for hybrids Tall x Tall or Dwarf x Tall resistant to Lethal Yellowing disease creation in coconut breeding programme of Côte d’Ivoire
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