Identification of Quantitative Trait loci and Environmental Interactions for Grain Yield Components in Bread Wheat under Aluminum Stress
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عنوان دوره: پانزدهمین کنگره زراعت و اصلاح نباتات ایران
نویسندگان
Sara Farokhzadeh1 ، Barat Ali Fakheri2 ، Nafiseh Mahdinejad3 ، Sirus Tahmasebi4 ، Abbas Mirsoleimani5
1PhD. Student, Department of Plant Breeding and Biotechnology Faculty of Agriculture, University of Zabol, Iran, Zabol, S
2Full Professor, Department of Plant Breeding and Biotechnology, Faculty of Agriculture, University of Zabol Zabol, Iran,
3Assistant Professor, Department of Plant Breeding and Biotechnology, Faculty of Agriculture, University of Zabol, Zabol, Iran,
4Assistant 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,
5Assistant Professor, Department of Plant Production, Shiraz University, Collage of Agriculture and Natural Resources of Darab, Darab, Iran,
چکیده
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 MQTLs
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 markerassisted
selection (MAS) to improve Al resistance of wheat genotypes in breeding programs.
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 MQTLs
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 markerassisted
selection (MAS) to improve Al resistance of wheat genotypes in breeding programs.
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