Phenotypic and genotypic screening of brown planthopper resistance in rice

Sandhya, S.
Kitturmath, M.S.
Deepak, C.A.
Vijay Kumar, L.
Sanath Kumar, V.B.
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Abstract

Molecular characterization of selected 50 rice genotypes, including landraces and germplasm has been performed to identify the resistance sources against brown planthopper (BPH) using eight SSR markers linked to five BPH resistance genes. The results revealed that, the presence of all five BPH resistance genes viz., Bph3, Bph32, Bph17, Bph6 and Bph3 in the genotype, KMR-3. Likewise, the landraces viz., Kelivikua, Ram vaidya, Dubri budda, Dahi gurmatia, Chak hou poidon and Tilwo contained three BPH resistant genes (Bph17, Bph3 and Bph6). Further, Mahasuri, Vargol, Pateni and IET-31591 also exhibited three BPH resistant genes (Bph32, Bph17 and Bph6). Contrarily, Jeerige sanna, Navara, Ratnachoodi-1, Rajamudi, TN-1 (SC) and Jyothi exhibited only one gene (Bph17). A total of ten accessions registered four to five BPH resistant genes and such accessions could be efficiently utilized as source of planthopper tolerant genes in formulating upcoming rice breeding programmes.

Keywords Brown planthopper, rice germplasm, phenotypic screening, SSR markers, molecular characterisation