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Annals of Botany 90: 231-238, 2002
© 2002 Annals of Botany Company

Assessment of the Validity of the Sections in Musa (Musaceae) using AFLP

CAROL WONG1, RUTH KIEW2, GEORGE ARGENT3, OHN SET2, SING KONG LEE1 and YIK YUEN GAN*,1

1 Natural Sciences Academic Group, National Institute of Education, Nanyang Technological University, 1 Nanyang Walk, 637616 Singapore, 2 Singapore Botanic Gardens, 1 Cluny Road, 259569 Singapore, 3 Royal Botanic Garden, Edinburgh EH3 5LR, UK

* For correspondence. Fax +65 8969445, e-mail yygan{at}nie.edu.sg

Received: 15 November 2001; Returned for revision: 7 January 2002; Accepted: 22 April 2002

Musa L. (Musaceae) is currently separated into five sections (Musa, Rhodochlamys, Callimusa, Australimusa and Ingentimusa) based on chromosome numbers and morphological characters. However, the validation of this classification system is questioned due to the common occurrence of hybridizations across sections and the system not accommodating anomalous species. This study employed amplified fragment length polymorphism (AFLP) in a phenetic examination of the relationships among four sections (material of sect. Ingentimusa was not available) to evaluate whether their genetic differences justify distinction into separate groups. Using eight primer combinations, a total of 276 bands was scored, of which 275 were polymorphic. Among the monomorphic bands, 11 unique markers were identified that revealed the distinct separation of the 11-chromosome species from the 10-chromosome species. AFLP results suggest that species of sect. Rhodochlamys should be combined into a single section with species of sect. Musa, and likewise for species of sect. Australimusa to be merged with those of sect. Callimusa.

Key words: Banana, Musa, Musaceae, section, Rhodochlamys, Callimusa, Australimusa, AFLP, DNA fingerprinting.


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