QTL mapping for bioenergy traits in sweet sorghum recombinant inbred lines

Author(s):Show less -

de Souza, Vander Fillipe ^[1] ; Pereira, Guilherme da Silva ^{[2, 3]} ; Pastina, Maria Marta ^[1] ; da Costa Parrella, Rafael Augusto ^[1] ; Ferreira Simeone, Maria Lucia ^[1] ; Barros, Beatriz de Almeida ^[1] ; Noda, Roberto Willians ^[1] ; da Costa E Silva, Luciano ^[4] ; de Magalhaes, Jurandir Vieira ^[1] ; Schaffert, Robert Eugene ^[1] ; Franco Garcia, Antonio Augusto ^[2] ; Borges Damasceno, Cynthia Maria ^[1]

Affiliation

^[1] Embrapa Maize & Sorghum, BR-35701970 Sete Lagoas, MG - Brazil

^[2] Univ Sao Paulo, Luiz de Queiroz Coll Agr, Dept Genet, BR-13418900 Piracicaba, SP - Brazil

^[3] Univ Fed Vicosa, Dept Agron, BR-36570900 Vicosa, MG - Brazil

^[4] SAS Inst Inc, JMP Div, Cary, NC 27513 - USA

• Document type: Journal article
• Source: G3-GENES, GENOMES, GENETICS; v. 11, n. 11 NOV 2021.
• Web of Science Citations: 0

Abstract

During the past decade, sweet sorghum (Sorghum bicolor Moench L.) has shown great potential for bioenergy production, especially biofuels. In this study, 223 recombinant inbred lines (RILs) derived from a cross between two sweet sorghum lines (Brandes x Wray) were evaluated in three trials. Single-nucleotide polymorphisms (SNPs) derived from genotyping by sequencing of 272 RILs were used to build a high-density genetic map comprising 3,767 SNPs spanning 1,368.83 cM. Multitrait multiple interval mapping (MT-MIM) was carried out to map quantitative trait loci (QTL) for eight bioenergy traits. A total of 33 QTLs were identified for flowering time, plant height, total soluble solids and sucrose (five QTLs each), fibers (four QTLs), and fresh biomass yield, juice extraction yield, and reducing sugars (three QTLs each). QTL hotspots were found on chromosomes 1, 3, 6, 9, and 10, in addition to other QTLs detected on chromosomes 4 and 8. We observed that 14 out of the 33 mapped QTLs were found in all three trials. Upon further development and validation in other crosses, the results provided by the present study have a great potential to be used in marker-assisted selection in sorghum breeding programs for biofuel production. (AU)

• FAPESP's process: 12/25236-4 - Comparative QTL mapping and genomic synteny between sweet sorghum and sugarcane
• Grantee: Guilherme da Silva Pereira
• Support Opportunities: Scholarships in Brazil - Doctorate