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Identification of QTL underlying physiological and morphological traits of flag leaf in barley

Liu, L., Sun, G., Ren, X., Li, C. and Sun, D. (2015) Identification of QTL underlying physiological and morphological traits of flag leaf in barley. BMC Genetics, 16 (1).

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Abstract

Background
Physiological and morphological traits of flag leaf play important roles in determining crop grain yield and biomass. In order to understand genetic basis controlling physiological and morphological traits of flag leaf, a double haploid (DH) population derived from the cross of Huaai 11 × Huadamai 6 was used to detect quantitative trait locus (QTL) underlying 7 physiological and 3 morphological traits at the pre-filling stage in year 2012 and 2013.

Results
Total of 38 QTLs distributed on chromosome 1H, 2H, 3H, 4H, 6H and 7H were detected, and explained 6.53% - 31.29% phenotypic variation. The QTLs flanked by marker Bmag829 and GBM1218 on chromosome 2H were associated with net photosynthetic rate (Pn), stomatal conductance (Gs), flag leaf area (LA), flag leaf length (FLL), flag leaf width (FLW), relative chlorophyll content (SPD) and leaf nitrogen concentration (LNC).

Conclusion
Two QTL cluster regions associated with physiological and morphological traits, one each on the chromosome 2H and 7H, were observed. The two markers (Bmag829 and GBM1218) may be useful for marker assisted selection (MAS) in barley breeding.

Publication Type: Journal Article
Publisher: BioMed Central
Copyright: © 2015 Liu et al.
URI: http://researchrepository.murdoch.edu.au/id/eprint/28870
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