Flood prone

NSIC Rc 590 (Submarino 2) Rice Variety: Yield, Maturity and Characteristics

NSIC Rc 590 is an inbred rice variety for flood prone fields, known locally as Submarino 2. The NSIC approved it in 2020. It matures in about 144 days and averages 3.9 tonnes per hectare, with a top yield of 4.4 tonnes in trials.

5 min read Updated October 17, 2026 By the anee.io agriculture team Read it all with Libre + Anee
A storm over rice paddies, the flood risk NSIC Rc 590 is bred to face

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 590, or Rc 590, 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 144 days after sowing.
  • Yield: 3.9 tonnes per hectare on average, or about 78 cavans of 50 kilograms. The best trial reached 4.4 tonnes.
  • Holds up against: stem borer.
  • Watch out for: tungro.
  • Cooked rice: low amylose, so soft and tender.

Key facts about NSIC Rc 590

Key facts of NSIC Rc 590 (t/ha means tonnes per hectare)
TraitValue
Year approved2020
Local nameSubmarino 2
TypeInbred
Growing environmentFlood prone
Maturity144 days after sowing
Average yield3.9 t/ha
Top yield in trials4.4 t/ha
Plant height121 cm

How much does NSIC Rc 590 yield?

On average it gives 3.9 tonnes per hectare. That is about 78 cavans of 50 kilograms of palay. It sits close to the average of the 1 inbred on the list, which is 3.9 tonnes. But the top yield, 4.4 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 144 days from sowing to harvest. Varieties of 100 to 120 days count as short duration and 120 to 140 days as medium, so this one counts as long 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 blastIntermediateTook a middling share of damage
Bacterial leaf blightIntermediateTook a middling share of damage
TungroSusceptibleTook heavy damage
Brown planthopperIntermediateTook a middling share of damage
Green leafhopperIntermediateTook a middling share of damage
Sheath blightIntermediateTook a middling share of damage
Stem borerResistantHeld up well in the tests

So scout early for tungro. 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 590
MeasureValueClass
Amylose16.2 percentLow
Milling recovery66.7 percentGrade 1
Head rice56.6 percentGrade 1
Chalky grains12.8 percentGrade 3
Grain length6.7 mmLong
Grain shape, length to width3.1Slender
Protein9.7 percent

Amylose decides how rice cooks. With low amylose, expect rice that is soft. 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 fields that flood in the wet season. Even so, drain the field as soon as the water allows, because a long flood still costs yield. Our guide to typhoon preparation helps you plan for storms. For the right month in your province, see the best time to plant rice.

Plan your next season of NSIC Rc 590

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.

  • PSB Rc 44: 144 days, 4.1 tonnes per hectare on average, 1995
  • NSIC Rc 560: 143 days, 4 tonnes per hectare on average, 2019
  • NSIC Rc 564: 143 days, 3.8 tonnes per hectare on average, 2019
  • NSIC Rc 562: 143 days, 4.3 tonnes per hectare on average, 2019
What is the local name of NSIC Rc 590?
It is known as Submarino 2. Seed sellers and agriculturists use both names, so ask for either one.
How many days does NSIC Rc 590 take to harvest?
About 144 days after sowing. Then harvest when 85 to 90 percent of the grains are golden yellow.
What is the average yield of NSIC Rc 590?
It averages 3.9 tonnes per hectare, about 78 cavans of 50 kilograms. The best trial reached 4.4 tonnes. Your own yield depends on water, seed, fertilizer and timing.
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 tungro. So scout from the early weeks and act at the first signs.
Is it soft when cooked?
It has low amylose, 16.2 percent. So it cooks soft.

See how NSIC Rc 590 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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