Concept and Research Contents of Conditional QTL Mapping

QTLs analysis for wheat yield, quality, and physiology and anti-resistance traits were researched in this book Volume 1 by using the final phenotype data at mature or final development stages. However, it is well known that, during plant morphogenesis, plant development will go through the processes from short to tall, small immature grain to large grain size, from young to mature, during which doughtiness, low/high temperature, disease and many other adverse environmental factors can occur in addition to various improper agricultural practices (e.g., over-irrigation and/or-fertilization). These unfavorable factors would negatively affect interrelations between grain yield components (e.g., spike number/plant, grain number/spike and grain weight) and grain quality.