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 20 October, 2023.
Rice, is a staple crop for the global population and faces significant challenges from diseases viz., blast and bacterial blight. To combat these biotic stresses, Marker-assisted selection is employed for the development of resistant breeding lines against the concerned stresses. This study successfully demonstrated the stacking/pyramiding of Pi9 and Pi54 genes for blast resistance (Magnaporthe oryzae) and Xa21 gene for bacterial blight resistance (Xanthomonas oryzae p.v oryzae) and stringent phenotypic screening in the early generation of CO 51 X 562-4. Recurrent parent, CO 51 scored 5.0 for blast as a moderately resistant and susceptible reaction to blight screening. Among the five breeding lines of F4, blast resistance ranged from 1.5 to 3.8, while blight disease ranged from 0.6 to 0.7 cm as a resistant reaction. Progeny #6-28-3 recorded resistant reactions to blast and blight disease followed by Progeny #6-28-4.
Rice, Blast, Bacterial blight disease, Broad spectrum genes and gene stacking
