پديدآورندگان :
Farokhzadeh Sara Sfarokhzadeh87@gmail.com PhD. Student, Department of Plant Breeding and Biotechnology Faculty of Agriculture, University of Zabol, Iran, Zabol, , Fakheri Barat Ali Full Professor, Department of Plant Breeding and Biotechnology, Faculty of Agriculture, University of Zabol Zabol, Iran , Mahdinejad Nafiseh Assistant Professor, Department of Plant Breeding and Biotechnology, Faculty of Agriculture, University of Zabol, Zabol, Iran , Tahmasebi Sirus Assistant Professor, Department of Seed and Plant Improvement Research, Fars Agriculture and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Shiraz, Iran , Mirsoleimani Abbas Assistant Professor, Department of Plant Production, Shiraz University, Collage of Agriculture and Natural Resources of Darab, Darab
كليدواژه :
Wheat , Quantitative trait loci , Epistasis , Aluminum tolerance , Yield components
چكيده فارسي :
Aluminum (Al) toxicity is the main factor limiting crop productivity in acidic soils around the world. Therefore, genetics of Al stress tolerance in different crops has become a priority area of research. A recombinant inbred line (RIL) population derived from SeriM82 × Babax was examined to identify the main-effect QTLs, epistatic QTLs and GE effects for grain yield and its component traits under normal and aluminum stress conditions in two years. A total of 24 additive and 4 pairs of epistatic QTL for grain yield and its component were identified as distributing on 15 chromosomes. Main additive QTLs explained 0.0–0.32% of phenotypic variation. Of these QTLs, 16 M-QTLs were involved in QEI, but only one pair of QTL showed significant QQE. In general, the effect of epistasis was not as important as additive effects. Of main-effect QTLs, FSN and TGW QTLs at map positions 15.10 and 64.50 co-located with GYLD QTLs, respectively. The highest E-QTLs interaction belonged to grain number per spike (GSP). The contributions of the additive QEIs were higher than those of their corresponding additive QTL. Some of the main-effect QTLs (4 TGW QTLs and 4 GYLD QTLs) with no significant QTL × environment (QE) interaction were stable. Therefore, the markers closely linked to the QTLs have potential to be used for marker-assisted selection (MAS) to improve Al resistance of wheat genotypes in breeding programs.
