Genetic analysis and development of submergence tolerance rice (Oryza sativa l.) lines through MAS

Abstract

Rice (Oryza sativa L) is one of the most popular food and feeds over half population of the world. It belongs to the Poaceae family. The existing population of the world is 7.5 billion as of July 2017 and growth rate of around 1.11% per year according to the UNDP approximations elaborated by World meters as a July 2017. The latest United Nations projections indicate that world population will reach 10billion persons in the year 2056 (UNPD, 2015) and rice production must increase by 40-50% to meet the growing demand. In Bangladesh, the current population is 164,957,528 with population density 1266 per Km2 and Bangladesh ranks number 8 by population in the world as of Friday, July 28, 2017, based on the latest United Nations estimates.1 Food scarcity has been and will remain a major concern for Bangladesh as currently (2017) population growth rate is 1.15% per year. But rice and wheat cover 79.4 percent of total cultivable land of Bangladesh, as mentioned in FAO/WFP CFSAM 2008 Report. Global climate change such as floods, drought, cold and saline excesses in precipitation increasingly limit food, fiber, and forest production worldwide.2 In this circumstance, Marker assisted backcrossing (MABC) is one of the key components for breeders that facilitates the use of the results of genomics for farmers’ benefit.3 The applied case of MAS obviously demonstrates the superiority of using MAB compared to conventional backcrossing.4 For this purpose, we need to develop submergence tolerance HYV cultivar and Marker Assistant Selection (MAS) may play a vital role to develop that genotypes.