Abstract
Screening of rice lines resistance to brown planthopper (BPH) through mass screening, filtering line resistance and the population build-up are essential for the release of resistant rice varieties. In addition, the stages of the endurance are important in determining the stability of resistance, as well as the type of resistant. The research was carried out in the screen house at Indonesian Center for Rice Research in 2007. The BPH used in the research was the off spring of BPH biotype 3 that had been rearing on IR42 (bph2) variety since 1994. The result of this research showed that 22.2% of 18 lines/varieties were moderately resistant to BPH biotype 3ft namely BP4130-1f-13-3-2*B, BP4188-7f-1-2-2*B, BP2870-4e- Kn-22-2-1-5*B, and Pulut Lewok. On the population build-up test, the above lines/varieties were moderately resistant to BPH biotype 3pb. The low FPLI values were found in BP4130-1f-13-3-2*B and Pulut Lewok. The highest tolerance index was found on BP4130-1f- 13-3-2*B and Pulut Lewok followed by BP2870-4e-Kn-22-2-1-5*B and BP4188-7f-1-2-2*B. Pulut Lewok has the highest antibiosis index and is not significantly different to BP4130-1f-13-3-2*B, while BP4188-7f-1-2-2*B was lowest. Although Pulut Lewok has antibiosis defense mechanism, it is not tolerant to BPH biotype 3. The BP4130-1f-13-3-2*B line have both antibiosis and tolerant to BPH biotype 3. BP4188-7f-1-2-2*B line has tolerance character, but does not have character of antibiosis to BPH biotype 3.
Highlights
Screening of rice lines resistance to brown planthopper (BPH) through mass screening, filtering line resistance and the population build-up are essential for the release of resistant rice varieties
The BPH used in the research was the off spring of BPH biotype 3 that had been rearing on IR42 variety since 1994
The result of this research showed that 22.2% of 18 lines/varieties were moderately resistant to BPH biotype 3ft namely BP4130-1f-13-3-2*B, BP41887f-1-2-2*B, BP2870-4e- Kn-22-2-1-5*B, and Pulut Lewok
Summary
Uji penapisan Uji penapisan ketahanan 18 galur/varietas padi terhadap wereng coklat dilakukan di rumah kasa Balai Besar Penelitian Tanaman Padi di Sukamandi pada musim tanam (MT) 2007. Galur padi tersebut berasal dari skrining massal sebanyak 610 galur/varietas padi inbrida, hibrida, dan tipe baru yang agak tahan terhadap wereng coklat biotipe 3 (Tabel 1). Galur-galur yang memperlihatkan ketahanan terhadap wereng coklat diuji lanjutkan ke penapisan, ditambah dengan tujuh varietas differensial, yaitu TN1, Mudgo, ASD7, Rathu Heenati, Babawee, Pokkali, dan PTB33. Populasi wereng coklat biotipe 3 yang digunakan berasal dari populasi yang telah dipelihara sejak tahun 1994 pada varietas IR42 (bph). Perbanyakan massal wereng coklat untuk pengujian dilakukan pada tanaman padi tersebut berumur 30 hari setelah tanam. Benih padi disemaikan dalam kotak kayu berukuran 80 cm x 60 cm x 10 cm yang berisi
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