Zinc and iron concentration QTL mapped in a Triticum spelta × T. aestivum cross

Posted by Carelia Juarez on , in Journal Articles

Published in Theoretical and Applied Genetics 127 (7) : 1643-1651, 2014

Srinivasa, J.Arun, B.Mishra, V.K.Singh, G.P.Velu, G.Babu, R.Vasistha, N.K.Joshi, A.K. 

The genetic basis of accumulation in the grain of Zn and Fe was investigated via QTL mapping in a recombinant inbred line (RIL) population bred from a cross between Triticum spelta and T. aestivum.The concentration of the two elements was measured from grain produced in three locations over two consecutive cropping seasons and from a greenhouse trial. The range in Zn and Fe concentration across the RILs was, respectively, 18.8–73.5 and 25.3–59.5 ppm, and the concentrations of the two elements were positively correlated with one another (rp =+0.79). Ten QTL (five each for Zn and Fe accumulation) were detected, mapping to seven different chromosomes. The chromosome 2B and 6A grain Zn QTL were consistently expressed across environments. The proportion of the phenotype explained (PVE) by QZn.bhu2B was >16 %, and the locus was closely linked to the SNP marker1101425|F|0, while QZn.bhu6A (7.0 % PVE) was closely linked to DArT marker 3026160|F|0. Of the five Fe QTL detected, three, all mapping to chromosome 1A were detected in all seven environments. The PVE for QFe.bhu3B was 26.0 %.

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