Studying the Compatibility and Stability of Promising Early Rice Lines in Multi-Location Performance Comparison Experiments

Extended Abstract Background: Rice is the second most important grain in the world after wheat and is considered one of the oldest crops. Although its cultivated area in the world is less than wheat, its production amount equals wheat. This plant is the main food of more than half of the world's people, with a per capita consumption of 50 kg. In many developing countries, the rice produced does not keep up with consumption due to population growth, and it is expected that this problem will become more acute in the future. Therefore, international organizations have tried to speed up breeding programs, and in this regard, the International Rice Research Institute (IRII) has paid special attention to rice-growing countries. In recent years, the spread of the system of rice cultivation twice a year, along with the risk of water shortage, has seriously limited the area under cultivation of late varieties, which have higher water consumption. Therefore, the development of semi-pure early and dormancy-resistant cultivars, with a shorter growth period and less water requirement, is one of the most important research priorities. The present research was carried out in the form of two experiments