The Division of Crop Improvement works with Plant Breeders, Seed Technologist and Crop physiologist with the mandate of providing rice ecosystem based varieties in rice and rice fallow crops and supplying quality seeds for the seed chain in the State besides studying the basic concepts of rice.
We have the pride of releasing 48 varieties and one hybrid in rice for cultivation in Tamil Nadu besides the introduction of 14 varieties from other states or countries. The iconic varieties are ADT 36, ADT 37, ADT 39, ADT 43, ADT (R) 45, CR 1009 and I.W.Ponni. Rich heritage germplasm comprising 1480 genotypes in different maturity groups is being maintained at this division. In the seed production chain, the breeder seeds of our varieties account for 68 - 75 per cent in the State indent. We collaborate with IRRI, ICAR and Private seed companies for the common agenda in the applied research.
The research thrust is also being given to rice fallow crops like pulses, cotton and soybean. So far, 5 varieties in Black gram, 3 varieties in greengram and one each in soybean and cotton were released from this institute for rice fallow situations.
The main objectives of our division is
Tamil Nadu Rice Res. Institute, Aduthurai (50 + 1*)
Introduced Rice Varieties
ADT 37 - 1987 (BG 280-1/PTB 33)
ADT 38 - 1987 (IR 1529 / IR 4432 // IR 7963)
ADT 39 - 1988 (IR 8/ IR 20)
ADT 43 - 1998 (IR 50 / I.W. Ponni)
ADT 44 – 2000 (IR 56/OR 142-99)
ADT(R) 45 - 2001 (IR 50 / ADT 37)
ADT(R) 46 - 2002 (ADT 38 / CO 45)
ADT (R) 47 - 2005 (ADT 43 / Jeeragasamba)
• 118 days
• Suitable for Sornavari / Kar / Kuruvai
• Medium slender rice
• 1000 grain weight 13.5g
• Amylose content 20.4%
• Resistant to Bacterial leaf blight and RTD
• Yield: 7.0 t/ha
ADT (R) 48 - 2005 (IET 11412 / IR 64)
Improved White Ponni - 1984 (Taichung 65 / ME 80)
• 135 days
• Medium slender rice
• Resistant to Tungro, BLB and Green Leaf hopper
• Yield: 5.0 t/ha
• Preferred by farmers, buyers, mill owners and consumers
ADTRH 1 Rice hybrid - 1998 (IR 58025A/ IR 66R)
• May - June sowing
• 110 -115 days
• Long panicle and more number of grains
• Long slender rice
• Slight aroma during cooking
• Field tolerance to Stem Borer, Leaf Folder
• Yield: 6.5 t/ha
CR 1009 - 1984 (Pankaj / Jagannath )
• 150 days
• Short bold white rice
• High tillering and non lodging
• Yield: 6.0 t/ha
ADT 3 Green gram - 1988 (H70-16/Rajendran/G65)
• 65 – 70 days
• 500 kg/ha
• Suitable for rice fallow (Jan. 15th to Feb 15th)
ADT 3 Blackgram 1981 (PLS from Tirunelveli local)
• 70 - 75 days
• Season – Jan. 15th to Feb 15th
• 720 kg/ha
• Suitable for rice fallow
ADT 5 Blackgram (Selection from Kanpur Local)
• 70 - 75 days
• 1200 kg/ha
• Suitable for summer irrigated(April sowing)
SEED SCIENCE AND TECHNOLOGY
Screening of Rice varieties for Submergence tolerance in Cauvery delta zone and physiological efficiency of growth and productivity of rice under SRI in comparison to normal system of cultivation are the main objectives currently.
Ø Spray of methanol 5% or 2% root extract of Eichornia and Gibbrellic acid increases rice yield, improves photosynthetic efficiency and panicle exertion and reduces the spikelet sterility in Samba and Thaladi rice crops.
Ø Spray of kinetin 20 ppm at heading stage, 2% tender coconut water or 5% arappu leaf extract increased the Thaladi rice yield.
Ø Application of 500 kg/ha of lime hastened the root activity of thaladi rice and decomposition of kuruvai stubbles respectively.
Ø 2%DAP spray at flowering stage increases rice fallow pulses yield.
Ø 100ppm Salicylic acid spray at flowering stage increases soybean yield.