Molecular mapping of the brace root traits in sorghum (Sorghum bicolor L. Moench)

Ronggai Li, Yucui Han, Peng Lv, Ruiheng Du, Guoqing Liu

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The presence and morphology of plant brace roots are important root architecture traits. Brace roots contribute significantly to effective anchorage and water and nutrient uptake during late growth and development, and more importantly, have a substantial influence on grain yield under soil flooding or water limited conditions. However, little is known about the genetic mechanisms that underlie brace root traits. In this study, quantitative trait loci (QTLs) for presence of brace roots from the sorghum landrace "Sansui" were mapped and associated molecular markers were identified. A linkage map was constructed with 109 assigned simple sequence repeat markers using a F2 mapping population derived from the cross Sansui/Jiliang 2. Two QTLs associated with presence of brace roots were localized on chromosomes 6 and 7. The major QTL on chromosome 7 between markers Dsenhsbm7 and Xcup 70 explained about 52.5% of the phenotypic variation, and the minor QTL on chromosome 6 was flanked by Xtxp127 and Xtxp6 and accounted for 7.0% of phenotypic variation. These results will provide information for the improvement of sorghum root architecture associated with brace roots.

Original languageEnglish
Pages (from-to)193-198
Number of pages6
JournalBreeding Science
Volume64
Issue number2
DOIs
Publication statusPublished - Jun 2014

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Braces
Sorghum
Sorghum bicolor
Sorghum (Poaceae)
chromosome mapping
quantitative trait loci
Quantitative Trait Loci
chromosomes
phenotypic variation
Chromosomes, Human, Pair 6
Chromosomes, Human, Pair 7
plant morphology
water uptake
nutrient uptake
landraces
growth and development
Plant Roots
Water
grain yield
microsatellite repeats

Cite this

Molecular mapping of the brace root traits in sorghum (Sorghum bicolor L. Moench). / Li, Ronggai; Han, Yucui; Lv, Peng; Du, Ruiheng; Liu, Guoqing.

In: Breeding Science, Vol. 64, No. 2, 06.2014, p. 193-198.

Research output: Contribution to journalArticle

Li, Ronggai ; Han, Yucui ; Lv, Peng ; Du, Ruiheng ; Liu, Guoqing. / Molecular mapping of the brace root traits in sorghum (Sorghum bicolor L. Moench). In: Breeding Science. 2014 ; Vol. 64, No. 2. pp. 193-198.
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