Distribution in genome of Quantitative trait loci (QTL) for yield and yield-related traits in common wheat (Triticum aestivum L.)

A major objective of quantitative trait loci (QTL) studies is to find genes/markers that can be used in breeding programs via marker assisted selection (MAS). From an extensive review, we surveyed the distribution of QTL for yield and yield-related traits on wheat genome. In order to identify the important regions involving in these traits, QTL meta-analysis was performed. As a result, 55 MQTL were identified for these trait, of which 12 significant MQTL were located wheat chromosomes 1A, 1B, 2A, 2D, 3B, 4A, 4B, 4D and 5A. Our study showed the genetic control of yield and its components also involved the important genes such as the Rht and Vrn. Furthermore, several significant MQTL were found in the orthologous region corresponding to some important rice genes underlying QTL for yield related traits. Those results demonstrated that QTL meta-analysis was a potential tool for refining QTL position and could improve the MAS efficiency for wheat grain yield improvement in breeding program.