Author(s):

Sandeep Bhandarkar, PK Tiwari, B Sharma, SK Nair, D Sharma and AK Sarawgi

Abstract: In Chhattisgarh, rice occupies average of 3.6 million ha. With the productivity of the state ranging between 1.2 to 1.6 t/ha depending upon the rainfall. The state is comprised with three agro-ecological zones i.e. Chhattisgarh plain. Bastar plateau and northern hill region of surguja. Chhattisgarh is famous for its diversity of rice. In every district of CG specific traditional rice is famous, which is locally grown by the farmers and very much popular among the local peoples for consumption in daily diet. These varieties are locally adapted by farmers and grown as traditional rice by the farmers, such traditional aromatic varieties are very poor in yield due to low test weight, lodging losses, unawarness regarding fertilizer use, spacing and susceptibility to diseases and pests. Looking to poor yield response of traditional aromatic varieties, new crossed were attempted between high yielder, biotic stress susceptible/tolerant genotypes with traditional aromatic lines in the past and their advanced lines are developed. These prominent advanced long slender and medium slender lines were screened under natural conditions against major diseases of rice. Sixty eight long slender and medium slender advanced rice genotypes along with eleven checks namely Indira Sugandhit Dhan 1, Pusa basmati-1, IR 64, Chandrahasini, Indira Sona, Badsha Bhog, Chinnor, Mahisugandha, Dubraj, Shamjeera and Vishnu bhog were evaluated in field condition for yield and major diseases of rice prominent at Chhattisgarh during kharif 2014. Entries AS 996-HR 1, R 1656-1936-1-1-800-1, R 1656-2821-1-3245-1 and R 1629-234-6-1883-1 had exhibited moderately resistant reaction (score-5) against BLB whereas rest of the varieties showed susceptible to highly susceptible reactions for the disease. Under natural conditions, none of the genotype showed highly resistant reaction against sheath rot. Whereas, genotypes R 1656-1936-1-1-800-1, PR 26703-3B-PT25, R 1679-1860-1-783-1 and RSR 2011B-12-1 were found for resistant reactions (score-3) for sheath rot disease. Three genotypes namely, R 1656-3173-1-415-1, R 1545-184-3-22-1 and RRF 75 were showed highly resistant reaction for sheath blight. Hybrid check Indira Sona (6385 kg/ha.) was highest yielder followed by IR 84887-B-15 (5847 kg/ha.), R 1700-308-3-170-1 (5653 kg/ha.), IR 83376 B-B 110-3 (5484 kg/ha.) and R 1917-951-1-541-1 (5483 kg/ha.). All top five yielder entries were susceptible againt BLB, Sheath rot and Sheath blight diseases except entries R 1700-308-3-170-1 and R 1917-951-1-541-1, which was resistant against sheath blight

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