3.1. Bibliographic Review and Data Synthesis

Information about QTLs that are related to drought tolerance in rice and molecular markers from the genetic maps was collated from published reports. There were 20 reports of QTL mapping for rice traits under drought including this study. The QTL are from different traits from different studies and few of them being in similar positions. Total of 635 QTLs were collected from previous studies that include various traits of rice reported in drought studies. These traits involved roots, leaf, flower, grain yield, plant height, shoot, water, drought score, biomass, temperature, recovery score, stem and seed function that may be affected by the change in water potential within the plant. Only QTLs for traits under drought stress condition from the studies were included in the data synthesis while the QTLs for traits observed under control conditions were excluded, as these QTLs are not relevant to the present investigation. All the information of QTLs and molecular markers from each past study was mapped and visualized using Biomercator V4.2.