1Department of Genetics and Plant Breeding, Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University, Coimbatore-641 003
2Department of Plant Biotechnology, Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, Coimbatore-641 003
3Department of Rice, Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University, Coimbatore-641-003
4Department of Oilseeds, Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University, Coimbatore-641-003
5Directorate of Research, Tamil Nadu Agricultural University, Coimbatore-641 003
*E-Mail: manonmanitnau@gmail.com
Online published on 19 July, 2023.
Blast disease is a highly destructive disease and causes significant yield losses in rice. To address this issue, this study was chosen and focused on stacking of the Pi9along with CO 51+Pi54, which provide broad-spectrum resistance to blast pathogen. This study demonstrated that stacking of Pi9 along with CO 51+Pi54, against blast disease. An advanced breeding line was evaluated for blast disease resistance in a natural hotspot region over two growing seasons (kharif 2021 and kharif 2022). All 36 progenies revealed genetic potential of the stacked genes and exhibiting resistance to blast disease kharif 2021 and kharif 2022. The recurrent parent, CO 51 is moderately resistant while CO 51 with Pi9+Pi54 genes displayed a blast score 0<2, indicating strong resistance. Average yield of single plant has been increased 0.28% to 35.05% in NILs of CO 51. Maximum single plant yield of 35.05 % was recorded in progeny #20x6-5-11-121 which was followed by the progeny #20x6-5-11-125 (31.65%).
Rice, Blast disease, Gene stacking, Pi9 Pi54 and marker assisted selection
