H. Habibuddin, K. Hadzim, O. Othman and S. Azlan

Abstract

Y 1286 is an improved tungro resistant rice line developed from a cross between a locally bred variety, MR 123 and an Indonesian variety, Balimau Putih. Balimau Putih is resistant to both tungro viruses (RTBV and RTSV), but is
photoperiod sensitive, lodging prone and low yielding variety, while MR 123 is a high yielder but susceptible to tungro infection. The developed Y 1286 is an improved line, which showed resistance to RTBV multiplication. It is also resistant to RTSV infection. Its potential yield is not greatly affected after being inoculated with tungro viruses. Y 1286 line is non-photoperiod sensitive, shorter in height and resistant to lodging. Its yield is slightly lower but not significantly different from that of MR 84. Y 1286 is thus recommended to be used as a genetic resistance source in the breeding programme for the development of high yielding tungro resistant rice varieties. The seeds are deposited in the MARDI rice germplasm collection centre as accession number 9344.

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