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- Title
Genetic resources of African mahogany in Brazil: genomic diversity and structure of forest plantations.
- Authors
Faria, Júlio Cézar Tannure; Konzen, Enéas Ricardo; Caldeira, Marcos Vinicius Winckler; de Oliveira Godinho, Tiago; Maluf, Luciana Prata; Moreira, Sarah Ola; da Silva Carvalho, Carolina; Leal, Bárbara Simões Santos; dos Santos Azevedo, Cássia; Momolli, Dione Richer; da Costa Pinto Coelho, Gracielle Teodora; de Oliveira, Conceição de Maria Batista; Soares, Taís Cristina Bastos
- Abstract
Background: African mahogany species (Khaya sp.) have been introduced to Brazil gaining increasing economic interest over the last years, as they produce high quality wood for industrial applications. To this date, however, the knowledge available on the genetic basis of African mahogany plantations in Brazil is limited, which has driven this study to examine the extent of genetic diversity and structure of three cultivated species (Khaya grandifoliola, Khaya senegalensis and Khaya ivorensis) and their prospects for forest breeding. Results: In total, 115 individuals were genotyped (48 of K. grandifoliola, 34 of K. senegalensis and 33 of K. ivorensis) for 3,330 filtered neutral loci obtained from genotyping-by-sequencing for the three species. The number of SNPs varied from 2,951 in K. ivorensis to 4,754 in K. senegalensis. Multiloci clustering, principal component analysis, Bayesian structure and network analyses showed a clear genetic separation among the three species. Structure analysis also showed internal structure within each species, highlighting genetic subgroups that could be sampled for selecting distinct genotypes for further breeding, although the genetic distances are moderate to low. Conclusion: In our study, SNP markers efficiently assessed the genomic diversity of African mahogany forest plantations in Brazil. Our genetic data clearly separated the three Khaya species. Moreover, pairwise estimates of genetic distances among individuals within each species showed considerable genetic divergence among individuals. By genotyping 115 pre-selected individuals with desirable growth traits, allowed us not only to recommend superior genotypes but also to identify genetically distinct individuals for use in breeding crosses.
- Subjects
GENETIC variation; PRINCIPAL components analysis; GERMPLASM; NEUTRAL density filters; GENETIC distance; PLANTATIONS
- Publication
BMC Plant Biology, 2024, Vol 24, Issue 1, p1
- ISSN
1471-2229
- Publication type
Article
- DOI
10.1186/s12870-024-05565-9