Exploration of Genetic Variability and Trait Association for Root Architecture Related Traits under Aerobic Conditions in Rice (Oryza sativa L.)


Vishal Reddy¹, Kalyani MB²*, Nakul D M² , Padmashree R² , Waghmode B D4 , Manjunatha B³ , Divya B² , Gireesh C² , Anantha M S² , Dushyantha Kumar B M¹ , Satish K M¹ , Usha T N¹, Kalleshwara Swamy C M¹ , Prem Sagar S P² , Madhavilatha K² , Anil A Hake² and Lokesha R¹*

1 Keladi Shivappa Nayaka University of Agricultural and Horticultural Sciences, Shivamogga – 577204, Karnataka 

2 ICAR- Indian Institute of Rice Research, Hyderabad – 500030 

3 Agricultural and Horticultural Research Station, Kathalagere, Shivamogga – 577219, Karnataka 

4 Regional Agricultural Research Station, Karjat – 410201, Maharashtra 

*Corresponding author Email: kalyani.mb@icar.gov.in, rlokesha@uahs.edu.in

Volume 16-(2), 2023   ;  https://doi.org/10.58297/GMSL7598   Click here for Pdf

Received : 7th November, 2023; Accepted : 4th December, 2023


In this study, we performed exploration of genetic variability for root architecture related traits in a mapping population derived from TI-128×BPT 5204, such as length, volume, fresh and dry weight, in influencing nutrient and moisture uptake during 60 days after sowing under aerobic conditions at three diverse environments for the selection of desirable lines. The variance analysis, revealed significant variations (p ≤ 0.005) for all studied traits, indicating a broader sense of genetic variability for selection purposes. Significant positive correlation was recorded between all the traits under study. The rice lines viz., TB 1, TB4, TB 8, TB 24, TB 51, TB 67 and TB 107 exhibited comparatively higher RL, RV and RDW, than all the checks used in the present study. The identified lines exhibiting better root architectural traits can benefit in developing a suitable DSR cultivar with better adaptability and performance under dry direct seeded rice conditions.