AFLP analysis of relationships among cassava and other Manihot species View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

1997-10

AUTHORS

A. C. Roa, M. M. Maya, M. C. Duque, J. Tohme, A. C. Allem, M. W. Bonierbale

ABSTRACT

Despite the worldwide importance of cultivated cassava (M. esculenta Crantz) its origin and taxonomic relationships with other species in the genus have not been clearly established. We evaluated a representative sample of the crop’s diversity and six wild taxa with AFLPs to estimate genetic relationships within the genus. Groupings of accessions of each species by data analysis corresponded largely with their previous taxonomic classifications. A mixed group, consisting of Manihot esculenta subsp. flabellifolia and M. esculenta subsp. peruviana, was most similar to cassava, while M. aesculifolia, M. brachyloba, and M. carthaginensis were more distant. Species-specific markers, which may be useful in germ-plasm classification or introgression studies, were suggested by the unique presence of AFLP products in samples of each of the three wild species. Heterogeneity of similarities among individuals of certain species suggested the existence of intraspecific gene pools, a hypothesis that was supported by morphological or ecogeographic evidence with varying degrees of success. Quantitative assessment of genetic diversity revealed greater homogeneity among cassava accessions than among itsclosest wild relatives. The demonstration of unique genetic diversity in the two M. esculenta subspecies and their genetic similarity to the crop supports the hypothesis that these materials may be the ancestors of cassava. More... »

PAGES

741-750

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s001220050620

DOI

http://dx.doi.org/10.1007/s001220050620

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1040572665


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