Molecular markers associated with aluminium tolerance in Sorghum bicolor

Too, E.J. and Onkware, A.O. and Were, B.A. and Gudu, S. and etl, . (2018) Molecular markers associated with aluminium tolerance in Sorghum bicolor. Hereditas, 155. pp. 1-13.

[img]
Preview
 PDF (This is an Open Access Article) - Published Version
| Preview

Abstract

Background: Sorghum (Sorghum bicolor, L. Moench) production in many agro-ecologies is constrained by a variety of stresses, including high levels of aluminium (Al) commonly found in acid soils. Therefore, for such soils, growing Al tolerant cultivars is imperative for high productivity. Methods: In this study, molecular markers associated with Al tolerance were identified using a mapping population developed by crossing two contrasting genotypes for this trait. Results: Four SSR (Xtxp34, Sb5_236, Sb6_34, and Sb6_342), one STS (CTG29_3b) and three ISSR (811_1400, 835_200 and 884_200) markers produced alleles that showed significant association with Al tolerance. CTG29_3b, 811_1400, Xtxp34 and Sb5_236 are located on chromosome 3 with the first two markers located close to AltSB, a locus that underlie the Al tolerance gene (SbMATE) implying that their association with Al tolerance is due to their linkage to this gene. Although CTG29_3b and 811_1400 are located closer to AltSB, Xtxp34 and Sb5_236 explained higher phenotypic variance of Al tolerance indices. Markers 835_200, 884_200, Sb6_34 and Sb6_342 are located on different chromosomes, which implies the presence of several genes involved in Al tolerance in addition to SbMATE in sorghum. Conclusion: These molecular markers have a high potential for use in breeding for Al tolerance in sorghum.

Item Type: Article
Uncontrolled Keywords: Aluminium tolerance, Mapping population, Molecular markers, Net root length in aluminium, Sorghum bicolor
Author Affiliation: Department of Plant Breeding, Swedish University of Agricultural Sciences, P.O. Box 101, SE-230 53 Alnarp, Sweden
Subjects: Crop Improvement
Divisions: Sorghum
Depositing User: Mr T L Gautham
Date Deposited: 03 Aug 2018 05:50
Last Modified: 03 Aug 2018 05:50
URI: http://eprints.icrisat.ac.in/id/eprint/15508

Actions (login required)

View Item View Item
EPrints Logo
eprints is powered by EPrints 3 which is developed by the School of Electronics and Computer Science at the University of Southampton. More information and software credits.