论文题目: Mapping QTLs with epistatic effects and QTL × treatment interactions for salt tolerance at seedling stage of wheat

论文编号:
作者: Xu YF（许云峰）, An DG（安调过）, Liu DC, Zhang AM, Xu HX（许红星） and Li B
刊物名称: Euphytica
卷期页码: 186, (1), 233-245
发表年度: 2012
DOI: http://www.springerlink.com/content/ru4572h74615x717/
摘要: Quantitative trait loci (QTLs) with additive (a), additive×additive (aa) epistatic effects, and their treatmental interactions (atandaat) were studied under salt stress and normal conditions at seedling stage of wheat (Triticum aestivumL.). A set of 182 recombinant inbred lines (RILs) derived from cross Xiaoyan 54×Jing 411 were used. A total of 29 additive QTLs and 17 epistasis were detected for 12 traits examined, among which eight and seven, respectively, were identified to have QTL×treatment effects. Physiological traits rather than biomass traits were more likely to be involved in QTL×treatment interactions. Ten intervals on chromosomes 1A, 1D, 2A (two), 2D, 3B, 4B, 5A, 5B and 7D showed overlapping QTLs for different traits; some of them represent a single locus affecting different traits and/or the same trait under both treatments. Eleven pairs of QTLs were detected on seemingly homoeologous positions of six chromosome groups of wheat, showing synteny among the A, B and D genomes. Ten pairs were detected in which each pair was contributed by the same parent, indicating a strong genetic plasticity of the QTLs. The results are helpful for understanding the genetic basis of salt tolerance in wheat and provide useful information for genetic improvement of salt tolerance in wheat by marker-assisted selection.