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Research achievements

since 1968, more than 1088 varieties including 72 hybrids have been released throught multi location testing for various agro-ecological systems prevalent across the country. Of these varieties, 503 are for irrigated areas, 133 for rainfed uplands, 194 for rainfed low lands, 44 for semi deep and 18 for deep water situation, 51 for high altitudes, 42 for saline and alkaline areas, 10 for aierobic, 19 for boro and 74 aromatic long and short grain varieties were released. More than 66 varieties have been developed by the Directorate of which 44 are central releases and the rest are released in different states. Globally 19 varieties released through AICRIP are being cultivated in 25 other rice growing countries.                                 

 

Significant achievements during 2015-2016

 

New Varieties and Hybrids released

 

Forty two varieties and four hybrids were released during 2015-16 by Central Sub Committee on Crop Standards, Notification and Release of Varieties (CSCCSN & RV) and State Varietal release Committee (SVRC). Central Sub Committee on Crop Standards, Notification and Release of Varieties released 15 varieties and three hybrids (KRH 4, KPH 460 and ADV 8301). The State Varietal Release Committees released 27  varieties;  for  Andhra  Pradesh  (1),  Gujarat (2), Karnataka (2), Kerala (5), Maharashtra (1), Madhya  Pradesh  (1),  Manipur  (1),  Telangana (3) Uttarakhand (4), and West Bengal (7). These high yielding varieties (HVYs) were released for cultivation in different ecologies viz., irrigated, aerobic, basmati, rainfed shallow low land, deep water and coastal saline areas. Many of these varieties  are  resistant/moderately  resistant  to biotic stresses.

 

Crop Improvement 

  • During   the   year   2015,   42   varietal,   one screening nursery and three hybrid rice trials were conducted in 682 experiments at 160 locations in 27 states and 2 union territories covering all the 7 zones in the country. In addition, 14 INGER nurseries involving 666 entries were tested at 58 centers.
  • Forty two varieties and four hybrids were released during 2015-16 by Central Sub Committee on Crop Standards, Notification and Release of Varieties (CSCCSN & RV) and State Varietal release Committee (SVRC).
  • The     varietal     identification     committee identified 14 varieties and 3 hybrids for release in different states across ecologies.
  • Of the 666 entries were tested in 14 INGER nurseries, 61 were found promising based on phenotypic acceptability and yield for multi location testing.
  • Breeder seed production (BSP) of 217 rice varieties and parental lines of 8 rice hybrids was organized at 43 centers across the country as per the DAC indents. A total production  of  7757.42  quintals  of  breeder seed  was  achieved  against  the  target  of 4328.42  quintals,  thus  marking  79%  more than the indented quantity. At IIRR center, 11 varieties and A,B and R lines of DRRH-3 were included in breeder seed production with a total production of 160.82 quintals against the target of 87.30 quintals

  


Agronomy

 

  • Among   nutrient   management   methods, Leaf Color Chart (LCC) based N application resulted in highest yield across all the locations closely followed     by   150% recommended fertilizer dose.
  • The    evaluation    of    crop    establishment methods   along   with   different   nutrient combinations over ten locations clearly indicated superiority of System of Rice Intensification (SRI)  (4.7  t/ha)  over  direct seeded with SRI principles (4.26 t/ha).
  • Site Specific Nutrient Management (SSNM) results based on Nutrient Expert revealed that, it was effective in increasing the yield in all the locations. Over all mean yield was 5.49 t/ha under same treatment followed by SSNM based on LCC (5.32 t/ha).
  • Mechanized System of Rice Intensification (SMSRI) showed better performance with overall  mean  grain  yield  in  all  locations (5.49 t/ha) followed by manual hand transplanting in lines and crop management for puddled transplanted rice (SRI) (5.26 t/ ha).
  • The economical and efficient dose of new combination herbicide i.e., Penoxsulam + Butachlor @717.5 g a.i./ha was effective for control of weeds in transplanted rice.
  • The high yielding varieties, Mandyavijaya and       Dhanrasi    exhibited    better    weed suppressing      ability.   Hybrids   and   long duration high yielding varieties were found to have better weed suppressing ability over short duration varieties.
  • RDF  +  split  application  of  N  resulted  in highest kharif rice yield (5.0 t/ha) followed by Azotobactor + PSB + brown manuring with Dhaincha + residue mulch @ 2 t/ha +75% RDF. Location specific recommended practices  of  NPK  +  ZnSO4  (100:50:50:20) at Mandya location recorded highest yield (7.91 t/ha) than rest of the treatments. 

  


Soil Science 

 

  • Yield  gap  analysis  highlighted  the  steep gaps in yield obtained from the fields receivingrecommended    fertiliser    dose (RDF) and farmer fertiliser practice (FFP) which necessitates site specific nutrient management to realize the uniform best. There was an increase in rice grain yield from 45 to 140 % in nutrient expert (NE) tool based recommended plots compared to absolute control. Increased rice yield to an extent of 60-95 % was recorded in gypsum ameliorated sodic soils in Kanpur.   The highest yields were recorded in DRR Dhan 43 (4.37 t/ha), CSR 36 (4.26 t/ha), GSR 129 (4.24 t/ha) and DRR Dhan 42 (4.19 t/ha) with 100% GR supplementation.
  • Genotypes  27P-63,  PA  6444  and  US  312 recorded significant rice yield in limed acid soils of Moncompu.     Increased yield due to  liming  was  also  recorded  in  GSR  148, GSR 119 and DRR Dhan 43 at Ranchi and Aghonibora, US 312, 27P36 and PA 6444 at Titabar.
  • The positive interaction effect of water and nutrients through increase in yield was recorded in aerobic rice. Water productivity (kg grain/ha mm water used) ranged from 4.4 5.1 kg grain/ha mm water. There was 10-14 % saving in water requirement with 100 and 75% cumulative pan evaporation (CPE) irrigation,  respectively  over  150% CPE. Application of nutrients up to 180 kg N, 60 kg P2O5 and 100 kg K2O/ha significantly improved the grain yield.
  • Consistent superiority of conjunctive use of RDF+5t FYM/ha was maintained at MTUand TTB in kharif and rabi  seasons in a long term experimentation of 27 years. The highest enzyme activity of phosphatase, glucosidase and dehydrogenase was observed in the  reatment receiving FYM at 10t/ha, NPKZnS + FYM,  and 50%NPK + 25% GM-N + 25% FYM-N in Maruteru and Titabar as well.
  • The   supremacy   of   transplanted   rice   in production  over  DSR  and  aerobic  rice  by an extent of 13-46% was witnessed across locations namely IIRR, Kanpur, Moncompu and  Puducherry.    In    case    of    nutrient management practices, maximum yields were obtained with RDF+ organics at IIRR and Puducherry and with RDF at Kanpur and Moncompu. 

 


 

Plant Physiology 

 

 

  


 

 

Entomology  

 

 


 Plant Pathology  

  • Of 2474 entries in five different screening nurseries, the number of promising entries were 51 for leaf blast, 26 for neck blast, 56 for sheath blight, 56 for brown spot, 9 for sheath rot, 58 for bacterial blight, 27 for rice tungro virus, 40 for leaf scald and 26 for grain discolouration.
  • Of the 1015 germplasm accessions evaluated, two entries showed resistance to more than one disease viz., IC No. 211168 (blast and brown spot ) and 217196 (brown spot and sheath blight).
  • Monitoring   of   field   virulences   of   blast pathogen   revealed   minor   shift   in   the pathogen population.Bacterial     blight  pathogen  data  indicated  a major  shift  in virulence  profile  at Aduthurai, Maruteru, Patna, Navsari, Kaul and Raipur.
  • The      combination      fungicide      ICF-110 (tricyclazole 45% + hexaconazole 10% WG) both mean disease severity and incidence of leaf blast, neck blast, sheath blight, sheath rot and leaf scald. The combination product, Merger (tricyclazole 18%+ mancozeb 62% WP) 2.5 g/l proved effective against leaf blast, neck blast, sheath blight, brown spot and sheath rot.
  • The  data  on  special  IPM  trial  indicated that adoption of IPM practices reduced the progress of disease severity of major diseases compared to farmers’ practices. The highest disease   severity   was   (BLB-56.50%,   ShB-31.37%) observed in case of the fields where farmers practice was followed compared to BLB-11.31% and ShB-31.37% in plots where IPM was practiced.
  • The trial on false smut with three different dates of sowing revealed high disease infection  at  Ludhiana  and  Titabar  when crop was sown on 1st and 2nd week of June. Among the hybrids tested, KRH 2 was highly susceptible across the locations followed by DRRH 3 and US 312.
  • Production  oriented  survey  conducted  in 18  states  of  India  indicated  that  diseases like  blast,  neck  blast,  brown  spot,  sheath blight, sheath rot, false smut and bacterial blight were wide spread in low to moderate intensity  across  the  country.  Bakanae  has become  a  problem  in  Haryana,  Himachal Pradesh, Jammu and Kashmir and Punjab. A new disease called crown rot caused by Erwinia  chrysanthemi  was  reported  fromdifferent districts of Telangana. 

  Transfer of Technology 

  •  cafeteria   of   rice   technologies   were  demonstrated in 449 hectares area covering 19  states  and  five  major  rice  ecosystems of   the   country.   Out   of   449   Front   line demonstrations  (FLDs),  about  62%  were  conducted in irrigated rice ecosystem and 16.7% of FLDs were conducted in rainfed uplands.  More  than  10  %  of  FLDs  were organized in shallow lowlands and 2.23% in hill ecologies. About 5.68% of the FLDs were conducted in areas with problem soils.
  • During the year 2015-16, RKMP – IIRR in collaboration with C-DAC Hyderabad has developed a series of mobile apps for the benefit of Indian Extension Professionals and Farmers. Under Rice Knowledge Management    Portal    (RKMP)    activities, an extension interface / platform is being developed for extension professionals of the country.
  • As  part  of  ICAR-IRRI  workplan  GRiSP Theme         6,    an    innovative    participatory extension method (RiceCheck) has been piloted in Telangana and Tamil Nadu for identifying the key checks and practices. 

   


  Lead Research

Crop Improvement 

Plant Breeding

 

 

  Hybrid Rice

 

   

Biotechnology

 

 

  


Crop Production

Agronomy 

 

 Soil Science 

 

 Plant Physiology 

  

  


Crop Protection

Entomology

 

  

Pathology 

 

 

 

Transfer of Technology