Genetic diversity among INERA-Mulungu (DR Congo) Musa spp. germplasm and their relatedness to those in Tanzania using numerical taxonomy
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Date
2012
Journal Title
Journal ISSN
Volume Title
Publisher
NIAB 2012
Abstract
Bananas and plantains (Musa spp.) constitute staple food for over 20 million people in
Democratic Republic of Congo (DRC). Since 1960, DRC is considered as a secondary centre
of plantain diversification with few unknown accessions kept in the INERA-Mulungu genebank.
Through similarity coefficients, cluster (unweighted pair group method with arithmetic
mean, single, complete, sequential, agglomerative, hierarchical and nested design/clustering
procedure) and/or multivariate analyses, numerical morpho-taxonomy has established that
this diversity is composed of 37 different accessions. Each accession expressed 98 characters
among the 401 possible character states, thus providing 39,298 feature patterns (data
points). The 98 characters included 32 vegetative and 66 male and female inflorescences.
The accessions were clustered into three genomic groups (AAA, AAB and AABB). Subjective
classification ascertained nine subgroups: AAB-Silk, AAB-Pome, AAB-Plantain, AABB-Pisang
Awak, AAA-Cavendish, AAA-Ibota, AAA-Gros Michel, AAA-Green-Red and AAA-Lujugira-
Mutika. Three subgroups were further divided into nine clone sets which consisted of:
Dwarf and Giant Cavendish, French and Horn Plantains, and Musakala, Nfuuka, Nakitembe,
Nakabululu and Beer/Mbidde within Lujugira-Mutika. Numerical morpho-taxonomy effectively
indicated a relationship between the DRC and Tanzania’s Musa diversity. For example, the
accessions ‘Kamaramasengi’ and ‘Isangi’ were found to be similar to ‘Kisukari’ (AAB-Silk)
and ‘Ngego I’ (AAB-French) common in the Tanzanian Southern Highland. Likewise, the
accessions Kimalindi-fupi, Kimalindi-ndefu and Jamaica of Tanzania were duplicates of
Bakurura (Kigurube), Cavendish of Butuza and Gros Michel in DRC, respectively. Moreover,
numerical morpho-taxonomy confirmed the pedigree of AAB-Prata (Cibwalo) in FHIA 17
and FHIA 23 and the closeness of the ancestors of Yangambi Km5 and Gros Michel.
Furthermore, numerical morpho-taxonomy established AA-Mshale malembo as one of the AAALujugira-
Mutika parents. Molecular investigations are finally required to confirm the genomes.
Description
Plant Genetic Resources: Characterization and Utilization (2013) 11(1); 50–61
doi:10.1017/S1479262112000354
Keywords
Banana, Genebanks (DRC), Tanzania, Genomic group, Numerical morpho-taxonomy, Plantain