Irrigated lowland

NSIC Rc 680 (Tubigan 61) Rice Variety: Characteristics and Grain Quality

NSIC Rc 680 is an inbred rice variety for irrigated lowland, known locally as Tubigan 61. The NSIC approved it in 2022. Its days to harvest and trial yield are not published yet, but its pest ratings and grain quality are below.

4 min read Updated October 17, 2026 By the anee.io agriculture team Read it all with Libre + Anee

If you came here looking for rice variety 680, or Rc 680, 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.

Holds up against: stem borer.
Watch out for: tungro, sheath blight.
Cooked rice: intermediate amylose, so soft but not sticky.

Key facts about NSIC Rc 680

Key facts of NSIC Rc 680 (t/ha means tonnes per hectare)
Trait	Value
Year approved	2022
Local name	Tubigan 61
Type	Inbred
Growing environment	Irrigated lowland
How to plant it	Wet direct seeded

How many days does it take, and how much does it yield?

This variety's days to harvest and trial yields are not published yet. So ask the seed seller or your municipal agriculturist for the figures from the trials in your region before you plan the season. Once you know the day count, anee.io dates every task from each lot's own planting day, with the growth stages and weather beside it. Meanwhile, our guide to raising rice yield per hectare covers the habits that matter with any variety.

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 disease	Rating	What it means
Rice blast	Intermediate	Took a middling share of damage
Bacterial leaf blight	Intermediate	Took a middling share of damage
Tungro	Susceptible	Took heavy damage
Sheath blight	Susceptible	Took heavy damage
Green leafhopper	Intermediate	Took a middling share of damage
Brown planthopper	Intermediate	Took a middling share of damage
Stem borer	Resistant	Held up well in the tests

So scout early for 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 680
Measure	Value	Class
Amylose	18.4 percent	Intermediate
Milling recovery	70.1 percent	Premium
Head rice	53.9 percent	Grade 1
Chalky grains	44 percent	Not graded
Grain length	6.8 mm	Long
Grain shape, length to width	3.3	Slender
Protein	6.7 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. You can plant it wet direct seeded. For the right month in your province, see the best time to plant rice.

Plan your next season of NSIC Rc 680

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, with their days and yields. So if seed of this one is hard to find, compare these first.

NSIC Rc 684: 114 days, 5.4 tonnes per hectare on average, 2022
NSIC Rc 738: 110 days, 5.9 tonnes per hectare on average, 2023
NSIC Rc 740: 110 days, 5.9 tonnes per hectare on average, 2023
NSIC Rc 622: 103 days, 5.6 tonnes per hectare on average, 2021

What is the local name of NSIC Rc 680?

It is known as Tubigan 61. Seed sellers and agriculturists use both names, so ask for either one.

When was NSIC Rc 680 approved?

The NSIC approved it in 2022. Its days to harvest and trial yield are not published yet, so ask for the regional trial figures before you plant.

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, sheath blight. So scout from the early weeks and act at the first signs.

Is it soft when cooked?

It has intermediate amylose, 18.4 percent. So it cooks soft but not sticky.

Where can I buy certified seed of this variety?

Ask accredited seed growers in your province or your municipal agriculturist. Look for the certified seed tag on the sack before you pay.

See how NSIC Rc 680 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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