QTLs for Energy-Related Traits in a Sweet × Grain Sorghum [Sorghum bicolor (L.)Moench] Mapping Population

Felderhoff, T. J. and Murray, S. C. and Klein, P. E. and et al, . (2012) QTLs for Energy-Related Traits in a Sweet × Grain Sorghum [Sorghum bicolor (L.)Moench] Mapping Population. Crop Science.

[img] PDF (Post-print) - Accepted Version
Restricted to ICRISAT researchers only

[img] PDF (Supplement) - Accepted Version
Restricted to ICRISAT researchers only


To meet anticipated markets for sweet sorghum production, the development of sweet sorghum hybrids is underway. As this development is in its infancy, genetic markers will be very useful to define the genetic basis of sugar yield components and reduce the time required to deliver new hybrids to market. The purpose of this research was to characterize genetic components that influence sweet sorghum productivity and agronomics. A grain × sweet sorghum mapping population was evaluated for 16 phenotypic traits across four environments. 185 F3 derived F4 (F3:4) lines were derived from the parents ‘BTx3197’ and ‘Rio’, which are 9 dry-stalked grain and juicy-stalked sweet sorghums, respectively. A genetic map was constructed with 381 single nucleotide polymorphisms (SNPs) and quantitative trait locus (QTL) analysis was performed. A major and previously reported QTL for soluble solids was identified on chromosome 3, but in contrast to previous studies, this QTL co-localized with other QTLs that had negative influences on desirable traits. Therefore, selection for this QTL may not be advantageous. A limited number of QTLs for percent moisture were found, and results indicated that the dry-stalk phenotype does not affect moisture content as measured in this study. Thus, breeding for moisture content will be more challenging than previously expected. The absence of dominance effects for the brix trait indicated that brix must be high in both parents to produce high brix in hybrids.

Item Type: Article
Additional Information: Support for this project was provided by the Office of Science ( 1 BER), U.S. Department of Energy DOE-USDA Feedstock Genomics Grant No. DE-FG02-07ER644
Uncontrolled Keywords: QTL, sweet sorghum, brix, dry stalk, dominance
Author Affiliation: Department of Soil and Crop Sciences, Texas A&M University, College Station, TX
Subjects: Crop Improvement
Divisions: Sorghum
Depositing User: Mr Siva Shankar
Date Deposited: 18 May 2012 09:59
Last Modified: 02 May 2017 05:48
Official URL: http://dx.doi.org/10.2135/cropsci2011.11.0618
URI: http://eprints.icrisat.ac.in/id/eprint/5486

Actions (login required)

View Item View Item