Genetic diversity as revealed by AFLP fingerprinting and systematic relationships of species in Sesbania (Fabaceae) | ||||
| Taeckholmia | ||||
| Article 6, Volume 26, Issue 1, 2006, Page 105-120 PDF (395.92 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/taec.2006.12285 | ||||
 View on SCiNiTO | ||||
| Author | ||||
| Hanaa El-Shazly* | ||||
| Department of Biological and Geological Sciences, Faculty of Education, Ain Shams University, Roxy, Cairo, Egypt | ||||
| Abstract | ||||
| Genetic diversity has been revealed, using AFLP finger printing, in 37 accessions representing 21 species of Sesbania. The AFLP data has been analyzed and distance trees, illustrating the relationships within and among species, have been constructed using UPGMA and neighbor joining (NJ) methods as implemented in the NTSYS-pc software. Both trees illustrated polymorphism between accessions of the same species, from different origins, but illustrated that intraspecific accessions have closer genetic affinity to each other than to other species. The NJ and UPGMA distance trees clearly delimited the species of the two subgenera Agati and Daubentonia as two separate groups from those in subgenus Sesbania. The AFLP data revealed considerable polymorphism among species of subgenus Sesbania that is not correlated with karyotype resemblances of species in this subgenus and their ability to cross. Based on AFLP data this subgenus may be regarded the center from which species in the other two subgenera have been derived. In the NJ tree S. quadrata and S. rostrata are distinguished from two large groups, but in the UPGMA tree S. quadrata is grouped with S. bispinosa and S. cannabina, whereas S. rostrata is grouped with S. exaltata in one of the NJ groups. The delimitation of species based on the analyses of AFLP data is discussed in the light of their systematic delimitation. | ||||
| Keywords | ||||
| Genetic diversity; AFLP finger-printing; Sesbania; systematics | ||||
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