QTL Mapping of a High Protein Digestibility Trait in Sorghum bicolor
Joint Authors
Robbins, Adriana L.
Hays, Dirk B.
Mason, R. Esten
Rooney, William L.
Winn, Jennifer A.
Source
International Journal of Plant Genomics
Issue
Vol. 2009, Issue 2009 (31 Dec. 2009), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2009-07-07
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
Compared with other cereal grains, Sorghum bicolor shows lower protein digestibility.
The low digestibility is thought to result from disulfide cross linking in the β- and γ-kafirins.
In contrast, the single recessive high digestibility/high lysine content (HD) mutation which confers greater grain digestibility exists in sorghum that is thought to result from reduced accumulation of γ-kafirin that allows greater access to the high digestible α-kafarin fraction.
In an effort to both clearly define the molecular basis for the HD trait and develop tools to improve the introgression of this difficult-to-screen trait, this study focuses on mapping the QTLs linked to this trait.
While the HD trait has been defined as a single recessive gene, our results uncovered that two major QTLs on chromosome 1 are associated with protein digestibility—one QTL (locus 1 from the HD parent) unfavorably affects digestibility and one QTL (locus 2 from the HD parent) only 20 cM away favorably affects digestibility.
A contrast analysis between genotypic groups at these two loci shows that a higher level of protein digestibility may be obtained when this linkage in repulsion is broken and favorable alleles are allowed to recombine.
American Psychological Association (APA)
Winn, Jennifer A.& Mason, R. Esten& Robbins, Adriana L.& Rooney, William L.& Hays, Dirk B.. 2009. QTL Mapping of a High Protein Digestibility Trait in Sorghum bicolor. International Journal of Plant Genomics،Vol. 2009, no. 2009, pp.1-6.
https://search.emarefa.net/detail/BIM-474180
Modern Language Association (MLA)
Winn, Jennifer A.…[et al.]. QTL Mapping of a High Protein Digestibility Trait in Sorghum bicolor. International Journal of Plant Genomics No. 2009 (2009), pp.1-6.
https://search.emarefa.net/detail/BIM-474180
American Medical Association (AMA)
Winn, Jennifer A.& Mason, R. Esten& Robbins, Adriana L.& Rooney, William L.& Hays, Dirk B.. QTL Mapping of a High Protein Digestibility Trait in Sorghum bicolor. International Journal of Plant Genomics. 2009. Vol. 2009, no. 2009, pp.1-6.
https://search.emarefa.net/detail/BIM-474180
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-474180