Evaluation of ‘Reference Panel’ of the Global Rice Array Exotic Rice Genotypes for BLB and False Smut Resistance under Field Condition

Author: Santanu Kumar Sahoo, Indra Deo, Shubham Kumawat and Gourav Kumar Mohanty

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Abstract

The present investigation was conducted at the Norman E. Borlaug Crop Research Centre (NEBCRC), Govind Ballabh Pant University of Agriculture and Technology, Pantnagar during Kharif 2021, to investigate the genetic potential of 39 ‘Reference Panel’ of the Global Rice Array exotic rice genotypes along with three checks viz. Govind, Pant Dhan 4 and Pant Dhan 12 against bacterial leaf blight and false smut. Bacterial suspension from infected disease materials was prepared. Clip method of artificial inoculation was used. The genotypes were screened for false smut under open infection condition. All the genotypes along with 3 checks were scored for BLB and false smut by using SES for Rice (IRRI, 1996). Out of all the tested genotypes, 17 showed highly resistant, 16 were moderately resistant and 6 lines viz. IR13V203, IR13V416, IR13V464, IR13V499, IR13V991 and IR13V1015 were susceptible. Among all the tested exotic genotypes, 6 genotypes namely IR13V203, IR13V224, IR13V617, IR13V624, IR13V112 and IR13V1119 showed highly resistance response to false smut. 16 were resistant, 8 showed moderately resistant, 6 were moderately susceptible whereas 3 genotypes viz. IR13V325, IR13V400 and IR13V681 exhibited highly susceptible response to false smut. These exotic genotypes will be further studied in different location with MAS and can be used as source of resistant genes for BLB and false smut to transfer in cultivated varieties.

Keywords

Xanthomonas oryza, Reference Panel GRA, exotic lines, BLB, false smut, rice

Conclusion

Due to different genetic background the genotypes varied significantly for bacterial leaf blight disease and false smut disease. Rice genotypes found resistant could be used as a donor source for developing bacterial leaf blight resistant variety in India. The genotypes found moderately resistant could be used as the resistant source for developing bacterial leaf blight resistant and false smut resistant varieties for various domains of India .The Exotic Genotypes are further evaluated through genotyping by using BLB SSR markers. As the BLB is a devastating disease in many part of rice growing area of India, so these exotic IRRI genotypes will play a very good resistant source for transferring resistant gene to our high yielding cultivated variety.

References

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How to cite this article

Santanu Kumar Sahoo, Indra Deo, Shubham Kumawat and Gourav Kumar Mohanty (2023). Evaluation of ‘Reference Panel’ of the Global Rice Array Exotic Rice Genotypes for BLB and False Smut Resistance under Field Condition. Biological Forum – An International Journal, 15(4): 810-813.