NGHIÊN CỨU KHẢO SÁT ĐA HÌNH GIỮA GIỐNG CHO VÀ NHẬN QTL/GEN TĂNG SỐ HẠT TRÊN BÔNG TRONG NGHIÊN CỨU VÀ CHỌN TẠO GIỐNG LÚA THUẦN CAO SẢN

Rice plant (Oryza sativa L.) is a key plant and providing daily foods for over 89 million persons in Vietnam. However, the pressure of rapid population growth, adverse effects from climate change and limited areas of rice growing in the country due to the urbanization and industrialization that needs to urgently enhance rice yield to meet the above demands. The objective of this study is to apply molecular assisted backcrossing (MABC) to transfer the QTL/gene (IGP7-increase grains per panicle) to some elite Vietnamese rice cultivars. The donor (KC25) and recipient plants (Khang dan 18, Bac thom 7, OM6976 and NPT1) have been successfully selected based on the agronomic and rice yield traits via field screenings. Initial results showed that the 3 SSR markers RM445, RM500 and RM21615 revealed polymophism at the target between the parental plants. A total of 156 markers distributed on the 12 chromosomes were used to screen the polymorphism between the parental polymorphism for background selection. Among these, 59 polymophic markers between Bac thom 7/KC25, 62 polymophic markers for Khang dan 18/KC25, 58 polymphic markers for OM6976/KC25, and 63 polymophic markers for NPT1/KC25, respectively. Ongoing works have been done to generate BC generations and followed the MABC steps in order to simultaneously attain the individual plants with the highest background of recipient parent and carrying the QTL/gene IGP7