Research acheivements

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Research acheivements
Agronomy
Soil Science
Plant Physiology
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Plant Pathology
Crop Improvement
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  Lead Research

Crop Improvement 

Plant Breeding

 

  • IET  23832  (RP  5886-HP  3-IR80463-B39-3), the first zinc rich variety was released by CVRC. It has high zinc content ( 22 ppm) in polished rice with mean yield of 5.2 t/ha and Recommended for Tamil Nadu, Andhra Pradesh, Telangana and Karnataka under irrigated ecology.
  • Five   future   generation   rice   lines   (FGR) possessing 6.5 to 7 t/ha yield potential were developed by utilizing tropical japonicas.
  • DRR dhan 46 with 22.7% yield gain over the check Sahbhagidhan was released by CVRC for the states of Bihar, Madhya Pradesh and Maharashtra. Two drought tolerant varieties namely Tripura Kharadhan 1 and Tripura Kharadhan 2 were released in the state of Tripura.
  • Chinsurah Nona Dhan 2, a derivative of O. nivara was found suitable for coastal saline areas and released in West Bengal.
  • Three lines ie., RP 5434-RAU 26-4, RP 5433- RAU-27-17 and RP 5433-RAU-19-2 with > 5 t/ha yield possessing good cold tolerance at seedling stage were identified.
  • An elite culture derived from the cross IR 64/ACC 2190 was found promising having resistance to planthoppers in field and green house conditions.
  • IET 24395 derived from the cross MTU 1075/ MTU 1010 was found to be superior over the best varietal and hybrid checks with >5% yield advantage and promoted to final year of testing in AVT-2- Late trial proposed during kharif, 2016.
  • Two  rice  based  products  viz.,  tooth  pain relief gel and mosquito repellent lotion were developed utilizing rice bran oil and brown rice extract. Rice based baked products namely  cake,  cookies,  pie  crusts,  muffins and doughnuts developed using rice bran oil spread (RBOS) were found to be superior in terms of consumer preference compared to  those  made  from  vanaspathi  ghee  and rice bran oil. Most of them contained low amount of transfats.
  • In vivo Glycemic acid (GI) studies revealed low GI in Dhanrasi (59.3) and Sampada (56.8) rice varieties.
  • Lines  with  good  kernel  elongation  after cooking (16 to 20 mm) were generated from the   crosses   Vasumathi/IET   19492,   Pusa 1121/IET 18990, Sugandhamati/IET 19492, IET 18033/ IET 18004 and IET 18033/ IET 19492 etc.
  • Three   land   races/wild   rices   of   North eastern region viz., Punshi, Moirang-Phou- Khokngangbi and Thangjing-Phou were found to be resistant with score 3 in Uniform Blast Nursery.
  • Genetic studies revealed quantitative nature of sheath blight tolerance. Employing SSRs putative quantitative trait loci were identified in the donor, RP 2068-18-3-5. A single minor QTL was detected on chromosome 5 with 7.8 % phenotypic variance.
  • Studies    on    grain    chalkiness    indicated decrease   in     amylose     content     while amylopectin increased with the increase in chalky area percentage. The grain density was less in varieties cultivated at high temperature

 

  Hybrid Rice

 

  • DRRH-92 successfully completed two years of testing in AICRIP trials (IHRT-MS). It is a high yielding hybrid with MS grain type having BPT 5204 grain type quality traits and medium duration. It showed yield superiority over the checks on in Zone III & VI.
  • IET  No  25352  (RP  5933-1-19-R-2)  derived from       partial      restorer      improvement programme was    promoted    to    AVT-1 medium duration trial. The IET 25352 registered yield superiority over best check in zone IV with 34.63% and in zone V with 12.18% and ranked third in the trial.
  • In  the  station  trial  during  kharif  2015,  10 promising  hybrids  viz.,  APMS  6A/TCP- 583, APMS 6A/TCP-647, IR 68897A/TCP- 643, APMS 6A/19-18R, IR 79156 A/19-18R, APMS  6A/7-65R,  APMS  6A/PRP-78,  IR 79156 A/ PRP 78, APMS 6A/PRP 123 and IR 79156 A/AR 9-21R were identified.
  • In the biotic & abiotic resistance breeding for parental line improvement, two popular maintainer lines viz., IR58025B and APMS6B were fortified with BB (Xa21) and blast (Pi2) resistance genes; attempts are being made to transfer the major drought tolerance QTL, qDTY12.1 and the low P tolerant QTL into the genetic background of the improved version of the elite restorer line, RPHR1005R, possessing Xa21 + Pi54.

   

Biotechnology

 

  • Promising  Bt  transgenic  IR64  lines  with Cry1Ac and BPT 5204 transgenic lines with DREB1A are under evaluation of transgene integration through Thermal Asymmetric Interlaced Polymerase    Chain    Reaction (TAIL-PCR).
  • A sucrose synthase locus LOC_Os2g58480 was identified as polymorphic in two mapping populations viz., Rasi / Vibhava and BPT5204/PTB1, and expression studies revealed its association with yield per se.
  • A set of hyper-variable genomic and EST-SSR markers (n = 36), GATA motif specific SSR markers (n = 14) and hyper-variable genomic SSR markers (n = 52) have been identified to be highly informative with respect to assessment of parental genetic diversity and prediction of heterosis in the hybrids.
  • Targeting  a  20-bp  polymorphism  in  the candidate gene for WA-CMS trait, WA352, located in the mitochondrial genome of rice, a robust, co-dominant functional marker, named RMS-3-WA352 has been developed and validated among all the WA-CMS lines and maintainer lines of rice.
  • In  a  study  on  wild  abortive-cytoplasmic male sterility (WA-CMS), a co-dominant marker was developed named RMS-PPR9-1,targeting an indel polymorphism in fertility restorer gene Rf4, viz., PPR9.
  • Ten   SNP   markers   were   developed   by targeting four key genes playing important role in starch bios synthesis through KASPER assay. These SNP markers were validated in 100 indica genotypes and high allele call rate (95.31%) was achieved with distinct classes.