Grain and cooking quality analysis in heat-tolerant QTL introgressed restorer of hybrid rice
Jaldhani V1 , Neeraja CN1 , Sanjeeva Rao D1 , Aravind Kumar J1 , Siromani N1 , Beulah P1 , Nagaraju P1 , Manasa Y1 , Rao PR1 , Subrahmanyam D1 , P Sudhakar2 , A Krishna Satya2 , Senguttuvel P*1
1. ICAR-Indian Institute of Rice Research, Hyderabad, India.
2. Biotechnology department, Acharya Nagarjuna University, Guntur, India.
Received: 21st November 2021; Accepted: 26th December 2021
Rice grain yield and quality are affected by the high temperature stress to a large extent. Four promising backcross introgression lines (BC2 F8 ) of KMR-3R/N22 carrying qHTSF1.1, qHTSF4.1 and HT Score QTLs were evaluated for high-temperature induced rice grain and cooking quality during Rabi 2021. Late-sown staggered planting was adopted to ensure uniform high-temperature stress on the improved restorers along with the parents used, which resulted in significant yield loss and grain quality degradation due to hightemperature stress. For cooking quality metrics, ANOVA showed significant variation among genotypes (G), treatments (T), and G×T. Among the backcross introgression lines (BILs), RP6338-9 possesses qHTSF4.1 noted to be promising for grain quality traits under high temperature stress.
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