Multi-environment analysis and improved mapping of a yield-related QTL on chromosome 3B of wheat

摘要: Improved mapping, multi-environment quantitative trait loci (QTL) analysis and dissection of allelic effects were used to define a QTL associated with grain yield, thousand weight early vigour on chromosome 3BL bread wheat (Triticum aestivum L.) under abiotic stresses. The had pleiotropic showed x environment interactions across 21 diverse environments in Australia Mexico. occurrence the severity water deficit combined high temperatures during growing season affected responsiveness this QTL, resulting reversal direction effects. influence can be substantial, allele from one parent (RAC875) increasing yield by up 12.5 % (particularly where both heat drought stress occurred) other (Kukri) 9 % favourable environments. With application additional markers genotyping recombinant inbred lines, genetic map region was refined provide basis for future positional cloning.