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 × 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.

Details

Title
QTL mapping for bioenergy traits in sweet sorghum recombinant inbred lines
Author
Vander Fillipe de Souza 1 ; Guilherme da Silva Pereira 2 ; Pastina, Maria Marta 1 ; Rafael Augusto da Costa Parrella 1 ; Ferreira Simeone, Maria Lúcia 1 ; de Almeida Barros, Beatriz 1 ; Noda, Roberto Willians 1 ; Luciano da Costa e Silva 3 ; Jurandir Vieira de Magalhães 1 ; Schaffert, Robert Eugene 1 ; Franco Garcia, Antonio Augusto 2 ; Borges Damasceno, Cynthia Maria 1 

 Embrapa Maize and Sorghum, Sete Lagoas, MG, 35701-970, Brazil 
 Department of Genetics, Luiz de Queiroz College of Agriculture, University of São Paulo, Piracicaba, SP, 13418-900, Brazil 
 JMP Division, SAS Institute Inc ., Cary, NC 27513, USA 
Publication year
2021
Publication date
Nov 2021
Publisher
Oxford University Press
e-ISSN
21601836
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
3169736363
Copyright
© The Author(s) 2021. Published by Oxford University Press on behalf of Genetics Society of America. This work is published under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.