Assessment of rice (Oryza Sativa l.) Genotypes againstdifferent diseases under field conditions
DOI:
https://doi.org/10.29019/enfoqueute.1235Keywords:
rice, field evaluation, genotypes, resistance, disease screeningAbstract
Present study aims to evaluate thirteen rice genotypes, comprising seven imported and six local varieties, along with the check cultivar IR24 (originating from China, RRI Kala-ShahKaku, and ICI, Pakistan), for resistance to bacterial leaf blight (BLB), brown spot (BS), and grain discoloration (GD) under artificial field inoculation conditions. The evaluation revealed significant differences between the hybrids and local rice types across various parameters. None of the varieties exhibited complete resistance to BLB, BS, or GD diseases. However, three varieties (CH3, CH9, and CH11) demonstrated moderate resistance (MR) to BLB. CH11 showed moderate resistance to BS, whereas CH3 and CH9 were moderately susceptible (MS). For GD, three genotypes (CH5, CH6, and CH7) were found to be susceptible (S) compared to the other genotypes. In terms of paddy yield, CH12 and CH13 recorded higher yields (10447 kg ha⁻¹ and 10064 kg ha⁻¹, respectively) than the other hybrids and varieties. While conventional rice types had moderate disease incidence and severity, they exhibited the lowest yield and yield-contributing characteristics compared to hybrid varieties.
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