Abstract
Pathum Thani 1 (PTT1) is a photoperiod-insensitive, aromatic Thai rice variety that is grown year-round. The rice from some locations is often priced lower than others due to sub-standard grain quality. This study sought to determine the limiting grain quality characteristic(s) in dry season PTT1 and their distribution across Thailand's irrigated rice regions. To do so, we evaluated the milling and physical quality of milled rice grain of dry season PTT1 from 24 provinces in 5 regions in Thailand. Sixty-seven paddy rice samples were collected and evaluated for head rice yield, chalkiness, whiteness, and translucency. Head rice yield varied by region, with the highest (48.1%) found in samples from the Central region, compared to 34.5-39.7% elsewhere. Head rice chalkiness was the physical quality that varied more widely among the provinces within each region than among regions, with chalkiness at a level that would adversely affect price in more than one-half of the samples. Contrary to the general perception that chalky grain is less resistant in milling, head rice yield actually increased with total chalkiness, expressed as % chalky grain by weight. The total chalkiness correlated negatively with translucency, while the head rice chalkiness correlated positively with whiteness. Grain chalkiness was identified as the grain quality attribute of PTT1 rice that varied with location; this directly affected the price of milled rice grain, as well as indirectly through its relationship with head rice yield and visual appearance of the milled rice grain.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Head rice yield was highest in the Central region at 48.1%, versus 34.5-39.7% elsewhere.
- Taxon
- rice
Oryza sativae0e1 - Material
- Pathum Thani 1t0
- Outcome
- Head rice yielde0
- Direction
- higheste0
- Value
- 48.1%e0
- Qualifier
- 34.5-39.7% elsewheree0
- Setting
- Central regione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Head rice yield varied by region, with the highest (48.1%) found in samples from the Central region, compared to 34.5-39.7% elsewhere”
t0“Pathum Thani 1”
e1“Head rice yield varied by region, with the highest (48.1%) found in samples from the Central region, compared to 34.5-39.7% elsewhere”
Claim · model-written summary
Head rice chalkiness varied more among provinces within regions than between regions.
- Taxon
- riceOryza sativae0e1
- Outcome
- Head rice chalkinesse0
- Direction
- varied more widelye0
- Setting
- provincese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Head rice chalkiness was the physical quality that varied more widely among the provinces within each region than among regions”
t0“Pathum Thani 1”
e1“Head rice yield varied by region, with the highest (48.1%) found in samples from the Central region, compared to 34.5-39.7% elsewhere”
Claim · model-written summary
Over half the samples had chalkiness sufficient to adversely affect price.
- Taxon
- riceOryza sativae0e1
- Outcome
- chalkinesse0
- Value
- more than one-halfe0
- Qualifier
- adversely affect pricee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chalkiness at a level that would adversely affect price in more than one-half of the samples”
t0“Pathum Thani 1”
e1“Head rice yield varied by region, with the highest (48.1%) found in samples from the Central region, compared to 34.5-39.7% elsewhere”
Claim · model-written summary
Head rice yield increased with total chalkiness.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“head rice yield actually increased with total chalkiness, expressed as % chalky grain by weight”
t0“Pathum Thani 1”
e1“Head rice yield varied by region, with the highest (48.1%) found in samples from the Central region, compared to 34.5-39.7% elsewhere”
Claim · model-written summary
Total chalkiness correlated negatively with translucency.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total chalkiness correlated negatively with translucency”
t0“Pathum Thani 1”
e1“Head rice yield varied by region, with the highest (48.1%) found in samples from the Central region, compared to 34.5-39.7% elsewhere”
Claim · model-written summary
Head rice chalkiness correlated positively with whiteness.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“head rice chalkiness correlated positively with whiteness”
t0“Pathum Thani 1”
e1“Head rice yield varied by region, with the highest (48.1%) found in samples from the Central region, compared to 34.5-39.7% elsewhere”
Claim · model-written summary
Chalkiness varied with location and directly affected milled rice price.
- Taxon
- riceOryza sativae0
- Material
- PTT1e0
- Outcome
- price of milled rice graine0
- Comparator
- Grain chalkinesse0
- Setting
- locatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain chalkiness was identified as the grain quality attribute of PTT1 rice that varied with location; this directly affected the price of milled rice grain”
Claim · model-written summary
Chalkiness affected price indirectly through yield and visual appearance.
- Taxon
- riceOryza sativae0e1
- Outcome
- head rice yield and visual appearancee0
- Comparator
- relationshipe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“as well as indirectly through its relationship with head rice yield and visual appearance of the milled rice grain”
t0“Pathum Thani 1”
e1“Head rice yield varied by region, with the highest (48.1%) found in samples from the Central region, compared to 34.5-39.7% elsewhere”