Irrigated lowland

NSIC Rc 226 (Tubigan 20) Rice Variety: Yield, Maturity and Characteristics

NSIC Rc 226 is an inbred rice variety for irrigated lowland, known locally as Tubigan 20. The NSIC approved it in 2010. It matures in about 112 days and averages 6.2 tonnes per hectare, with a top yield of 9.8 tonnes in trials.

5 min read Updated October 17, 2026 By the anee.io agriculture team Read it all with Libre + Anee
An irrigated palay field in the Philippines, where NSIC Rc 226 is meant to grow

The average and top yields in tonnes per hectare come from the trials each variety went through to be registered with the NSIC, and from what the seed companies say about their own seed.

What farmers harvest today can be different. Newer harvest records, the season, the place, the soil, the water and the care all move these numbers over time.

So use them to compare varieties, not as a promise for your field. Ask your seller or your agriculturist how the variety did on farms near you in the last few seasons.

If you came here looking for rice variety 226, or Rc 226, this is the one. Compare it with the other varieties in our rice variety finder before you buy seed. Also read our guide to rice varieties in the Philippines for how inbreds, hybrids and special rice differ.

  • Maturity: about 112 days after sowing when transplanted, 104 when direct seeded.
  • Yield: 6.2 tonnes per hectare on average, or about 124 cavans of 50 kilograms. The best trial reached 9.8 tonnes.
  • Season: Dry season and wet season.
  • Holds up against: brown planthopper, green leafhopper.
  • Watch out for: rice blast, bacterial leaf blight, tungro, sheath blight.

Key facts about NSIC Rc 226

Key facts of NSIC Rc 226 (t/ha means tonnes per hectare)
TraitValue
Year approved2010
Local nameTubigan 20
TypeInbred
Growing environmentIrrigated lowland
Recommended seasonDry season and wet season
How to plant itDry direct seeded, transplanted, wet direct seeded
Tested and suited inSoccsksargen, Central Visayas, Western Visayas
Maturity, transplanted112 days after sowing
Maturity, direct seeded104 days after sowing
Average yield, transplanted6.2 t/ha
Average yield, direct seeded5.4 t/ha
Top yield in trials9.8 t/ha
Plant height102 cm

How much does NSIC Rc 226 yield?

On average it gives 6.2 tonnes per hectare. That is about 124 cavans of 50 kilograms of palay. It sits above the average of the 118 irrigated lowland inbreds on the list, which is 5.2 tonnes. But the top yield, 9.8 tonnes, came from a trial with good water, seed and care. So plan your costs on the average, then work toward the top with the habits in our guide to raising rice yield per hectare.

How many days does it take to mature?

It takes about 112 days from sowing to harvest, and about 104 days if you seed it directly. Varieties of 100 to 120 days count as short duration and 120 to 140 days as medium, so this one counts as short duration. Then harvest when 85 to 90 percent of the grains turn golden yellow. Because the day count drives every task, anee.io counts it for you from each lot's own planting day, with the growth stages and weather beside it.

Is it resistant to pests and diseases?

Reactions in trials: R resistant, MR moderately resistant, I intermediate, MS moderately susceptible, S susceptible. Some carry a second rating in brackets.
Pest or diseaseRatingWhat it means
Rice blastSusceptibleTook heavy damage
Bacterial leaf blightSusceptibleTook heavy damage
TungroSusceptibleTook heavy damage
Brown planthopperModerately resistantTook some damage but held up
Green leafhopperModerately resistantTook some damage but held up
Stem borerIntermediateTook a middling share of damage
Sheath blightSusceptibleTook heavy damage

So scout early for rice blast, bacterial leaf blight, tungro, sheath blight. When you see the first signs, check the guide before you spray, because the right timing saves more than an extra dose. If you are not sure what you see, our pest and disease finders help you name it from the damage.

Grain and eating quality

Grain quality of NSIC Rc 226
MeasureValueClass
Amylose20.3 percentIntermediate
Milling recovery65.9 percentGrade 1
Head rice37.3 percentGrade 3
Chalky grains31.2 percentNot graded
Grain length6.9 mmLong
Grain shape, length to width2.6Intermediate
Protein6.5 percent

Amylose decides how rice cooks. With intermediate amylose, expect rice that is soft but not sticky. In fact, Filipino taste has moved from high to intermediate and low amylose rice, because people want it softer. Head rice is the share of whole grains after milling. So a higher number means fewer broken grains and a better price at the mill.

Where should you plant it?

It suits irrigated lowland, where you control the water. Level the field well so the water stands evenly, and plant together with the farms around you, so pests cannot move from field to field. Our guide to rice land preparation shows each step. It is recommended for the dry season and the wet season. You can plant it dry direct seeded, transplanted or wet direct seeded. It was tested and found suitable in Soccsksargen, Central Visayas and Western Visayas. For the right month in your province, see the best time to plant rice.

Plan your next season of NSIC Rc 226

Set the planting day of each lot and anee.io dates every task to harvest, with the weather beside it. Free on the Libre plan.

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Varieties like this one

These come from the same kind of farm and grow about as long. So if seed of this one is hard to find, compare these first.

  • NSIC Rc 760SR: 112 days, 6.1 tonnes per hectare on average, 2024
  • NSIC Rc 514: 112 days, 6 tonnes per hectare on average, 2018
  • NSIC Rc 216: 112 days, 6 tonnes per hectare on average, 2009
  • NSIC Rc 764SR: 111 days, 6.1 tonnes per hectare on average, 2024
What is the local name of NSIC Rc 226?
It is known as Tubigan 20. Seed sellers and agriculturists use both names, so ask for either one.
How many days does NSIC Rc 226 take to harvest?
About 112 days after sowing when transplanted, and about 104 days when direct seeded. Then harvest when 85 to 90 percent of the grains are golden yellow.
What is the average yield of NSIC Rc 226?
It averages 6.2 tonnes per hectare, about 124 cavans of 50 kilograms. The best trial reached 9.8 tonnes. Your own yield depends on water, seed, fertilizer and timing.
In which season should I plant it?
It is recommended for the dry season and the wet season. Then pick the month with our planting calendar guide and the forecast for your town.
Is this variety a hybrid?
No, it is an inbred. So the seed you buy grows true, but certified seed still gives the best start.
What should I watch for when I plant it?
In trials it was weak against rice blast, bacterial leaf blight, tungro, sheath blight. So scout from the early weeks and act at the first signs.

See how NSIC Rc 226 will do on your farm

With Libre + Anee, see its full record: how it yields, its strengths and weaknesses against pests, diseases and the weather, and whether it fits your farm, your season and your soil.

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