Crop Improvement


Crop Improvement 

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 

  1. To evolve short, medium  and long duration high yielding rice varieties with good  grain quality traits
  2. Breeding varieties for biotic and abiotic stresses in rice
  3. Development of high yielding hybrids
  4. Maintenance of diversified germplasm, cataloguing and utilization
  5. To produce and supply nucleus and breeder seeds of the released varieties in rice and rice fallow pulses to cater the state seed requirement.
  6. Need based research on seed and physiological responses of crops in the Cauvery Delta Zone
  7. Research on rice fallow pulses and fibre crops.
  8. Imparting knowledge on production of quality seeds and hybrid seed production to the farmers of the CDZ

Tamil Nadu Rice Res. Institute, Aduthurai (50 + 1*) 

 

Extra Early

ADT 3, 4, 30 and 48

4

Early duration

ADT 9, 12, 14, 15, 16, 19, 20, 23, 26,27, 28, 29,31, 33, 34,3 6, 37, 41, 42,43,45,47, 48 & ADTRH 1*

22+ 1*

Medium duration

ADT 18, 32, 35, 38 and 39

5

Long duration

ADT 1, 2, 5, 6, 7, 8, 10,11,13, 17, 21,22,24,25,40, 44 and 46    

17

            * Hybrid

 Introduced Rice Varieties

 

Early duration

IR 50, 64, Pusa 33, Pusa 2-21, IET 1722, 1444, 1786

7

Medium duration

IR 20 and 34

2

Long duration

IET 3257, Red Ponni, IW Ponni,

NLR 9672, CR 1009 

5

 ADT 36 Rice - 1980 (Triveni/IR 20)

            • 115 days
            • Medium slender rice
            • Resistant to blast and stemborer
            • Suitable for Sornavari /Kar /Kuruvai season
            • Yield: 6.0 t/ha
  



ADT 37 - 1987 (BG 280-1/PTB 33)

            •  110 days
            • Short bold white rice
            • Compact, long and dense panicle
            • Resistant to Green Leaf Hopper, 
            • Brown BPH, Blast and   Brown spot
            • Suitable for Kuruvai and Late thaladi
            • Yield: 5.5 - 6.0 t/ha

ADT 38 - 1987 
(IR 1529 / IR 4432 // IR 7963)

            • 130 - 135 days
            • Suitable for late samba / thaladi
            • Long slender white rice
            • Resistant to blast, Brown Plant Hopper,  
            • Rice Tungro Virus and Leaf spot
            • Yield: 5.5 t/ha


ADT 39 - 1988 (IR 8/ IR 20)


            •   125 days; Semidwarf
            •   Suitable for late thaladi
            •   Medium slender rice
            •   Resistant to blast, BLB and brown spot
            •   Yield: 5.8 t/ha


ADT 43 - 1998 (IR 50 / I.W. Ponni) 

            • 115 days
            •  Medium slender rice 
            • 1000 grain weight – 15.5g
            • Suitable for  Sornavari, Kar & Kuruvai
            • Yield: 7.0 t/ha
            • Resistant to GLH, stemborer and gallmidge

 


ADT 44 – 2000 (IR 56/OR 142-99) 


    •        145 - 150 days
            • Medium tall, short bold white rice
            • Resistant to  Green Leaf Hopper, Blast,
            • Stemborer, Leaf Folder and  Brown Spot
            • Yield: 6.2 t/ha

 


ADT(R) 45 - 2001 (IR 50 / ADT 37)

            • 105 – 110 days
            • Medium slender rice
            • 1000 grain weight 17.5 g
            • Amylose 23.2%; HRR 65.3%
            • Tolerant to drought
            • Resistant to gall midge, Green Leaf Hopper stemborer and sheath rot
            • Yield: 6.5 – 7.0 t/ha



ADT(R) 46 - 2002 (ADT 38 / CO 45) 

    •  
    • Ø  135 days, Suitable for Thaladi
            • Ø   Medium slender rice
            • Ø  1000 grain wt. 23.8g; Milling - 76%
            • Ø  Resistant to blast, Green Leaf Hopper, Leaf folder and Stem Borer
            • Ø  Moderately tolerant to RTD and Leaf spot
            • Ø  Yield: 6.5 t/ha

 

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) 


  • 95 days
  • Late Kuruvai season in Nagapattinam & Thiruvarur districts
  • Suitable for direct seeding during contingent situation
  • Long slender rice
  • Resistant to stemborer, leaf hopper and Gall midge
  • Yield: 4.8 t/ha

  

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 

  • The Department conducts need based seed technological research to develop technologies for improving productivity and production of notified crop varieties /hybrids 
  • The Department has undertaken breeder seed multiplication and distribution of rice varieties 
  • The Department has undertaken foundation and truthfully labeled seed production and distribution of crop varieties viz., pulses and rice  
  • Imparting training on quality seed production to farmers, seed producers and NGOs in varieties/hybrids of agricultural and horticultural crops

CROP PHYSIOLOGY

 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.

Technologies developed

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.

 


 

 
 
 
                                            Dr. R. Saraswathi
                                       Professor (PBG) and Unit Head
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