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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Molecular diversity and genetic structure of Saccharum complex accessions

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Author(s):
Medeiros, Carolina [1] ; Almeida Balsalobre, Thiago Willian [1] ; Carneiro, Monalisa Sampaio [1]
Total Authors: 3
Affiliation:
[1] Univ Fed Sao Carlos, Ctr Ciencias Agr, Dept Biotecnol & Prod Vegetal & Anim, Araras, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: PLoS One; v. 15, n. 5 MAY 22 2020.
Web of Science Citations: 0
Abstract

Sugarcane is an important crop for food and energy security, providing sucrose and bioethanol from sugar content and bioelectricity from lignocellulosic bagasse. In order to evaluate the diversity and genetic structure of the Brazilian Panel of Sugarcane Genotypes (BPSG), a core collection composed by 254 accessions of the Saccharum complex, eight TRAP markers anchored in sucrose and lignin metabolism genes were evaluated. A total of 584 polymorphic fragments were identified and used to investigate the genetic structure of BPSG through analysis of molecular variance (AMOVA), principal components analysis (PCA), a Bayesian method using STRUCTURE software, genetic dissimilarity and phylogenetic tree. AMOVA showed a moderate genetic differentiation between ancestors and improved accessions, 0.14, and the molecular variance was higher within populations than among populations, with values of 86%, 95% and 97% when constrasting improved with ancestors, foreign with ancestors and improved with foreign, respectively. The PCA approach suggests clustering in according with evolutionary and Brazilian breeding sugarcane history, since improved accessions from older generations were positioned closer to ancestors than improved accessions from recent generations. This result was also confirmed by STRUCTURE analysis and phylogenetic tree. The Bayesian method was able to separate ancestors of the improved accessions while the phylogenetic tree showed clusters considering the family relatedness within three major clades; the first being composed mainly by ancestors and the other two mainly by improved accessions. This work can contribute to better management of the crosses considering functional regions of the sugarcane genome. (AU)

FAPESP's process: 08/57908-6 - National Institute of Science and Technology of Bioethanol
Grantee:Marcos Silveira Buckeridge
Support Opportunities: Program for Research on Bioenergy (BIOEN) - Thematic Grants