ABSTRACT Fifteen newly-produced cacao hybrids were evaluated in the field with an objective of understanding their genetic diversity using morphological descriptors. The field trials were conducted in Ibadan (7° 13ʹN, 3° 51ʹE), and Owena (7° 11ʹN, 5° 1ʹE), Nigeria. Juvenile performance data were subjected to ANOVA, Principal Component and Cluster analyses. The first three principal axes accounted for 34.41%, 16.71%, and 14.09% of variation among the plant characters, respectively. Numerical taxonomy showed P2 x P11 as the most distinct. The FASTCLUS technique grouped the genotypes into four clusters, P2 x P11 being the only member of its group. There is significant genetic diversity among the genotypes, while plant height, stem diameter, Cherelle wilt, fruiting, and tree size among others are important discriminatory traits among cacao genotypes.

中文翻译：

---

基于幼年表型植物性状的尼日利亚可可（Theobroma Cacao）基因型多样性分析

摘要 在田间对 15 种新生产的可可杂种进行了评估，目的是使用形态描述符了解它们的遗传多样性。田间试验在尼日利亚的伊巴丹（7° 13ʹN，3° 51ʹE）和欧文纳（7° 11ʹN，5° 1ʹE）进行。对幼年性能数据进行方差分析、主成分和聚类分析。前三个主轴分别占植物性状变异的34.41%、16.71%和14.09%。数值分类法显示 P2 x P11 是最明显的。FASTCLUS 技术将基因型分为四个簇，P2 x P11 是其组的唯一成员。基因型之间存在显着的遗传多样性，而株高、茎粗、樱桃枯萎、结果和树木大小等是可可基因型之间重要的区分性状。