Indian Society of Genetics & Plant Breeding


QTL mapping of grain yield and its components under normal and drought stress conditions in barley (Hordeum vulgare L.)

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A population comprising of 118 double haploids of barley
derived from a cross, Nure x Tremois was evaluated for
different traits for yield and its components under normal
and drought stress conditions. Using a genetic map of 543
markers (DArT, SSR, SNP and AFLP), we identified 33
additive quantitative traits loci (QTLs) for phenological and
morphological traits. All of these Qtls had additive and
digenic effects. Five out of 67 epistatic Qtls exhibited
significant Q×T interactions. The majorities of main effects
were detected on chromosome 5H and affected primarily
plant height (PH), number of spikes /plant (Ns/P), kernels
per spike (KS), thousand kernel weight (TKW), main spike
length (MSL) and harvest index (HI). We identified additive
QTLs for plant height on most the chromosomes, except
4H. Five pairs of epistatic QTLs for plant height without
interaction with environments were also detected. However,
we did not find any additive QTLs for grain yield, but
detected nine epistatic QTLs on all of the barley
chromosomes. None of them had interaction with

Keywords: Morphological traits, agronomic traits, quantitative trait loci, drought tolerance, epistasis


Year: 2018
Volume: 78
Issue: 1
Article DOI: 10.5958/0975-6906.2018.00008.1
Print ISSN: 0019-5200
Online ISSN: 0975-6906


Barat Ali Fakheri info_circle
Reza Aghnoum info_circle
Nafiseh Mahdinezhad info_circle
Seyyed Saeid Pourdad info_circle
Bahram Masoudi info_circle

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