Molecular markers associated with aluminium tolerance in Sorghum bicolor

Sammanfattning

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 Alt(SB), a locus that underlie theAl 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.

Nyckelord

Aluminium tolerance; Mapping population; Molecular markers; Net root length in aluminium; Sorghum bicolor

Publicerad i

Hereditas
2018, volym: 155, artikelnummer: 20
Utgivare: BIOMED CENTRAL LTD

SLU författare

• Were, Beatrice angiyo

  • University of Eldoret

• Carlsson, Anders

  • Institutionen för växtförädling, Sveriges lantbruksuniversitet
    

• Dida, Mulatu Geleta

  • Institutionen för växtförädling, Sveriges lantbruksuniversitet
    

Globala målen (SDG)

SDG2 Ingen hunger

UKÄ forskningsämne

Genetik och förädling inom lantbruksvetenskap

Publikationens identifierare

• DOI: https://doi.org/10.1186/s41065-018-0059-3

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/94950