Adaptability of traditional rice varieties under PhilRice [Philippine Rice Research Institute] Negros [Philippines]
2018
Rogeno, L.A., | Seville, C.
Traditional rice varieties are rarely grown for commercial production because it is usually a low-yielder. These varieties however, possess desirable traits such resistance to pest and disease, tolerance to abiotic stress, aromatic, tastes good and excellent platability. These useful traits are usually transferred to our modern cultivated varieties. To maintain and fully utilize our wide genetic wealth for rice crop improvement, it is important to conserve and characterize these materials. One hundred thirty-six traditional varieties and farmers' selection were established in PhilRice Negros in 2017, wet season to assess its performance and adaptability. Well-performing varieties under PhilRice Negros with 105-30-60 NPK fertilizer rate and 20 cm x 20 cm planting distance are Gift 18, Minerva, Laila, Kosi, Azucena, Libtong, Dinorado and Ginandara with yield of 6.6, 6.2, 6.1, 5.8, 5.5, 5.2, 5.2 and 5t/ha, respectively. With regards to rice tungro virus (RTV) reaction, only few traditional varieties have been infected at below 3% economic threshold level and these are Lubang, Laila, Gift 18, Mukol Azucena, Balatinao, Burit, Cadidit and Calatrava. Ultimately, the varieties that showed resistance to RTV at the same time produced higher yield are Gift 18, Laila and Azucena whereas, varieties which showed RTV tolerance are Minerva, Libtong, Dinorado and Ginandara (3% infection but still attained good yield). These good performing entries can be planted by the farmers with similar climatic and soil condition as PhilRice Negros and can be a good source of tolerance to RTV and other desirable traits.
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