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New Rice Inbred Varieties Needed

We have featured the seven upcoming inbred rice varieties that are lined up for commercialization. The National Seed Industry Council has released them with the following names: PR71137 as NSIC Rc148 (Mabango 2); PJ27 as NSIC Rc150 (Tubigan 9); PR 30138 as NSIC Rc 152 (Tubigan 10); PR31561AR32 as NSIC Rc154 (Tubigan 11); C6824 as NSIC Rc156 (Tubigan 12); IR 77186 as N51G Rc158 (Tubigan 13); and PR30536 as NSIC Rc160 (Tubigan 14).

The name “Mabango” indicates that the variety is a glutinous rice, while “Tubigan” means that it is recommended for irrigated lowland culture.

NSIC Rc148 and NSIC RC158 were bred by the International Rice Research Institute (IRRI), while NSIC Rc156 was bred by UP Los Banos. The rest were bred by PhilRice (Philippine Rice Research Institute). The following are the important traits of the new varieties:

1. NSIC Rc148 is an early maturing glutinous variety whose yield in replicated tests was higher by 14.2 percent than IR 841. It matures in 110 days in the dry season and 112 days in the wet season. It has intermediate reactions to blast, bacterial leaf blight, sheath blight, white stemborer, green leafhopper, and brown planthopper.

2. NSIC Rc150 (PJ27) is the second product of the second PhilRice-JICA technical cooperation project. One of its parents is a japonica variety called Habataki. It matures in 109 days under transplanted condition and 102 days under direct wet-seeded culture. It has intermediate reactions to blast, bacterial leaf blight, sheath blight, and white stemborer. It is also resistant to yellow stemborer.

3. The yield of NSIC Rc152 is 7.5 percent higher than PSB Rc18 under transplanted condition and 8.7 percent higher under direct wet-seeded culture. Also an early maturing variety, it matures in 109 days under transplanted condition and 102 days under direct wet-seeded culture. NSIC Rc152 is moderately resistant to whitehead, which is caused by yellow stemborer during the reproductive stage. It also has intermediate reactions to blast, bacterial leaf blight, white stemborer, green leafhopper, and yellow stemborer.

4. NSIC Rc154 is the second product of biotechnology in the Philippines. It is actually an.improved PSB Rc14 with bacterial leaf blight resistance derived from an IRRI line through marker-aided selection. It matures in 110 days after sowing. Under transplanted and direct wet seeded conditions during the wet season, its yield was 21.4 percent and 9.1 percent higher than PSB Rc28. It has intermediate reactions to bacterial leaf blight, white – stemborer, green leafhopper, yellow stemborer, and brown planthopper.

5. NSIC Rc156 showed superior yield performance during the dry season with 7,191 kg/ha under transplanted condition, and 7,104 kg/ha under direct wet seeded condition. It matures in lil days as transplanted rice and 104 days as direct wet seeded rice. It is resistant to whitehead caused by yellow stemborer, and has intermediate reactions to white stemborer, yellow stemborer, and brown planthopper.

6. For five seasons, NSIC Rc158 had superior yields. Its average yield is 7,036 kg/ha as transplanted rice and 7,115 kg/ha as direct wet seeded rice. It matures in 113 days and is resistant to dead hearts and moderately resistant to whiteheads caused by white stemborer. It has intermediate reactions to blast, bacterial blight, sheath blight, rice tungro virus, and green leafhopper.

7. Lastly, the yield of NSIC Rc160 is comparable with the yield of PSB Rc18. It matures in 107 days after sowing and is resistant to whitehead caused by yellow stemhorer and moderately resistant to whitehead caused by white stemborer.

In a related development, some traders are reportedly selling breeder and foundation seeds of these varieties. Farmers must not be misled by these false claims, because these breeder seeds are not for sale and are only used by breeding institutions like PhilRice, IRRI and UPLB for the production of foundation seeds.

On the other hand, foundations seeds in a very limited scale are provided only to highly qualified members of the SeedNet for the production of registered and certified seeds.