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- Title
Cytomolecular diversity among Vigna Savi (Leguminosae) subgenera.
- Authors
Dias, Sibelle; Souza, Rosilda Cintra; Vasconcelos, Emanuelle Varão; Vasconcelos, Santelmo; da Silva Oliveira, Ana Rafaela; do Vale Martins, Lívia; de Oliveira Bustamante, Fernanda; da Costa, Victor Alves; Souza, Gustavo; da Costa, Antônio Félix; Benko-Iseppon, Ana Maria; Knytl, Martin; Brasileiro-Vidal, Ana Christina
- Abstract
The genus Vigna (Leguminosae) comprises about 150 species grouped into five subgenera. The present study aimed to improve the understanding of karyotype diversity and evolution in Vigna, using new and previously published data through different cytogenetic and DNA content approaches. In the Vigna subgenera, we observed a random distribution of rDNA patterns. The 35S rDNA varied in position, from terminal to proximal, and in number, ranging from one (V. aconitifolia, V. subg. Ceratotropis) to seven pairs (V. unguiculata subsp. unguiculata, V. subg. Vigna). On the other hand, the number of 5S rDNA was conserved (one or two pairs), except for V. radiata (V. subg. Ceratotropis), which had three pairs. Genome size was relatively conserved within the genus, ranging from 1C = 0.43 to 0.70 pg in V. oblongifolia and V. unguiculata subsp. unguiculata, respectively, both belonging to V. subg. Vigna. However, we observed a positive correlation between DNA content and the number of 35S rDNA sites. In addition, data from chromosome-specific BAC-FISH suggest that the ancestral 35S rDNA locus is conserved on chromosome 6 within Vigna. Considering the rapid diversification in the number and position of rDNA sites, such conservation is surprising and suggests that additional sites may have spread out from this ancestral locus.
- Subjects
VIGNA; DISTRIBUTION (Probability theory); GENOME size; RECOMBINANT DNA; CHROMOSOMES; LEGUMES
- Publication
Protoplasma, 2024, Vol 261, Issue 5, p859
- ISSN
0033-183X
- Publication type
Article
- DOI
10.1007/s00709-024-01944-z