National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Rice (OryzasativaL.) is an important cereal crop belonging to the family Poaceae and has two cultivated and 22 wild species. The cultivated species are Oryza sativa and Oryzaglaberrima. Oryza sativa is grown all over the world. Rice is known to suffer from number of diseases caused by fungal, bacterial and viral origins. Identification of resistant genotypes is again an essential continuous process either to recommend for cultivation in endemic area or to use as donors of the resistant genes. In view of these, the present investigation of evaluation of 244 rice varieties/genotypes against leaf and neck blast and brown spot diseases were carried out during Kharif 2014 at AHRS, Ponnampet to identify the sources of resistance under field conditions. 244 entries were tested in Uniform blast screening nursery for leaf blast and transplanted field of screening for neck blast and brown spot diseases resistance of paddy, out of which a IET-23609 found highly resistant to leaf blast disease of paddy and nine entries i.e. IET-23081, 23642, 23616, 23652, 23645, 23612, 23637, 23300, 23299showed resistant reactions to the leaf blast and remaining entries were found moderately resistant to highly susceptible reaction to leaf blast. The same entries were also screened for Neck blast disease out of which 38 entries i.e., IET-23088, 23081, 23642, 23616, 23652, Swarna, 23627, 23645, 23612, 23654, 23275, 24132, 24151, 23224, 23758, 24116, 23739, 22654, 23052, 23055, 23053, 23601, 23599, 23594, 23591, 23004, 22986, 22989, Dinesh, 22302, 22994, 23422, 22878, 24074, 24167, Samba Mahsuri (RP-1), Improved Samba Mahsuri (RP-2) and 23883 were found highly resistant, remaining entries were found resistant to highly susceptible reaction to Neck blast. Similarly, the same entries were also screened for brown spot disease out of which none of the entries found highly resistance and 3 entries i.e., IET-23403, 22876 and 23392 were found resistant reaction to brown spot disease. The remaining entries were found moderately resistant to highly susceptible reaction to brown spot disease.
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