Author/Authors :
Rahmati, Mahnaz Department Seed and Plant Improvement Research - Lorestan Agricultural and Natural Resources Research and Education Center - Agricultural Research, Education and Extension Organization, Khorramabad, Iran , Mardi, Mohsen Agricultural Biotechnology Research Institute of Iran (ABRII) - Agricultural Research, Education and Extension Organization, Karaj, Iran , MajidiHeravan, Eslam Agricultural Biotechnology Research Institute of Iran (ABRII) - Agricultural Research, Education and Extension Organization, Karaj, Iran , Nakhoda, Babak Agricultural Biotechnology Research Institute of Iran (ABRII) - Agricultural Research, Education and Extension Organization, Karaj, Iran , Naghavi, Mohammad-Reza Department of Plant Breeding - University of Tehran, Karaj, Iran , Azadi, Amin Department of Plant Breeding - Islamic Azad University Yadegar-e-Imam Khomeini (RAH), Shahre Rey Branch,Tehran, Iran , Mohammadi-Nejad, Ghasem Agronomy and Plant Breeding Department - Faculty of Agriculture - Shahid-Bahonar University of Kerman , Amini, Ashkboos Cereal Research Department - Seed and Plant Improvement Institute - Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran , Tabatabaei, Mohammad-Taghi Seed and Plant Improvement Research Department -Yazd Agricultural and Natural Resources Research and Education Center - Agricultural Research, Education and Extension Organization (AREEO), Yazd, Iran
Abstract :
In order to identify yield and yield component QTLs under control and salt-stress conditions, a
population of 254 recombinant inbred lines (RILs), derived from a cross between two bread wheat cultivars, (Roshan /
Sabalan), was assessed. Parents and their 254 recombinant inbred lines (RILs) were evaluated in an alpha-lattice design
with two replications in two control and saline environments of Yazd in 2011-2012 cropping season. Yield and yieldrelated traits were evaluated at harvest time. The genotyping was carried out using SSR and DArT markers. A, B and D
genomes were covered by 411.8, 620.4 and 67.5 cM, respectively. Also, a total of 48 QTLs were detected on 11
chromosomes for grain yield, biological yield, harvest index, thousand-kernel weight, grain number per spike, spike
weight and spikelet number per spike. Roshan (salt tolerance) alleles were associated with an increase yield under
saline conditions. SSR markers including gwm146, gwm577, gwm249 (on chromosomes 2A and 7B) were tightly
associated with different QTLs. The major effect QTLs were located on chromosomes 1A and 7B for grain yield,
harvest index and spike weight, which were explained 10.2%, 12.98% and 29 % of the total phenotypic variance,
respectively. These QTLs and markers could be suitable for marker-assisted selection and gene stacking techniques.
Moreover, co-located QTLs were detected on chromosome 2B for evaluated traits.
Keywords :
Bread wheat , QTL , Salt- stress , Grain yield
