DRR Dhan 65 (IET 27641) – A High Yielding Low Soil Phosphorous Tolerant and Climate Resilient Rice Variety Developed from Wild Introgression Lines


Divya Balakrishnan*, Sarla Neelamraju, Vijai Pal Bhadana, Jyothi Badri, Subba Rao LV, Sundaram RM, Subrahmanyam D, Voleti SR, Padmavathi G, Swamy AVSR, Senguttuvel P, Magrauithia SK, Anantha MS, Aravind Kumar J, Prasad MS, Laha GS, Ladhalakshmi D, Jhansi Lakshmi V, Padmavathi Ch, Padmakumari AP, Jhansi Rani B, Mahendrakumar R, Sreedevi B, Mangaldeep Tuti, Surekha K, Brajendra, Suneeta K, Revathi P, Gireesh C, Fiyaz RA, Kalyani MB, Suvarna Rani Ch, Sruthi K, Nirmala B, Nagarjuna E, Vijay Kumar M, Thaseen M, Pradeep Reddy M, Prasad Babu Adari, Malathi Surapaneni, Vishnu Prasanth V and Siddique EA

ICAR-Indian Institute of Rice Research (ICAR-IIRR), Rajendranagar, Hyderabad – 500030 *Corresponding author Email: dbiirr23@gmail.com

Volume 16-(2), 2023   ;  https://doi.org/10.58297/KDNM3479  Click here for Pdf

Received : 24th November, 2023; Accepted : 18th December, 2023


The wild species of Oryza are an important source of genetic variability for the improvement of yield and tolerance to biotic and abiotic stresses. Phosphorus (P) is the second most important key nutrient, vital for plant growth and development at all stages. Phosphorous deficiency is one of the factors limiting rice yields and farmer’s profitability so it is necessary to identify genotypes with stable yield and tolerance to P deficiency. Keeping in view the unlimited potential of wild species for yield enhancement and stress tolerance, interspecific population between Oryza rufipogon in the back ground of Oryza sativa genotype KMR3 was developed by advanced back cross breeding strategy. DRR Dhan 65 (IET 27641) (RP Bio 4919-B-B NSR86) is an interspecific wild introgression line, a derivative of KMR 3 / O rufipogon with short bold grains which is high yielding under both normal and low soil phosphorous conditions. It has seed to seed maturity of 130- 135 days and gives an average yield of 6.5 t/ ha (under normal conditions; 60 kg/ha of P, i.e., recommended dose) and 4.7 t/ ha (under low Phosphorus; 40 kg/ha of P). It was released for cultivation in Andhra Pradesh, Telangana, Karnataka, Chhattisgarh, Jharkhand and Maharashtra states through Central Sub-committee on Crop Standards, Notification and Release of Varieties for Agricultural Crops vide S.O. 4065(E) dated 31st August, 2022 [CG-DL-E-31082022-238490].