Abstract
Selecting the most appropriate vigor test for rice to predict seedling emergence remains a challenge. This is mainly attributed to the diversity of available tests that evaluate vigor; however, there is a critical need for tests that can show a high correlation with field emergence. Thus, this study aimed to determine which vigor tests are the most efficient in predicting the emergence of rice seedlings, to facilitate correct selection for quality control analyses and pre-sowing for rice seed commercialization. Across two growing seasons, 2016/17 and 2017/18, different seed lots of ‘SCS122 Miura’ rice were subjected to vigor evaluations including germination test, electrical conductivity, cold test, low temperature germination, accelerated aging, root and shoot length, seedling dry weight, emergence speed, and emergence speed index, and greenhouse and field emergence tests. A completely randomized design with four replicates was used for the experiments. All statistical analyses were performed using R software. The germination rate for ‘SCS122 Miura’ seed lots in both growing seasons was greater than 80%. In both growing seasons, unlike the similar results obtained for field emergence, in the laboratory tests, differences were observed between these same seed lots. Electrical conductivity and emergence speed showed a negative correlation with greenhouse and field emergence. The vigor tests for accelerated aging, emergence speed, and dry weight are more efficient in predicting the emergence of rice seedlings. Among the tested methods, accelerated aging (41 °C for 120 h) is one of the most efficient for predicting the emergence of rice seedlings and the best option for laboratory analysis of quality control and pre-sowing owing to its practicality and time required for execution.
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Claims 8
Claim · model-written summary
Germination exceeded 80% for SCS122 Miura rice seed lots in both seasons.
- Taxon
- rice
Oryza sativat0 - Material
- SCS122 Miurae0
- Outcome
- germination ratee0
- Direction
- greater thane0
- Value
- 80%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The germination rate for ‘SCS122 Miura’ seed lots in both growing seasons was greater than 80%.”
t0“rice”
Claim · model-written summary
Laboratory tests differentiated seed lots despite similar field emergence.
- Taxon
- riceOryza sativat0
- Outcome
- differences were observed between these same seed lotse0
- Comparator
- field emergencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“unlike the similar results obtained for field emergence, in the laboratory tests, differences were observed between these same seed lots.”
t0“rice”
Claim · model-written summary
Electrical conductivity correlated negatively with greenhouse and field emergence.
- Taxon
- riceOryza sativat0
- Outcome
- greenhouse and field emergencee0
- Direction
- negative correlatione0
- Comparator
- Electrical conductivitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Electrical conductivity and emergence speed showed a negative correlation with greenhouse and field emergence.”
t0“rice”
Claim · model-written summary
Emergence speed correlated negatively with greenhouse and field emergence.
- Taxon
- riceOryza sativat0
- Outcome
- greenhouse and field emergencee0
- Direction
- negative correlatione0
- Comparator
- emergence speede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Electrical conductivity and emergence speed showed a negative correlation with greenhouse and field emergence.”
t0“rice”
Claim · model-written summary
Accelerated aging was among the more efficient tests for predicting rice seedling emergence.
- Taxon
- riceOryza sativae0
- Treatment
- accelerated aginge0
- Outcome
- predicting the emergence of rice seedlingse0
- Direction
- more efficiente0
- Comparator
- emergence speede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The vigor tests for accelerated aging, emergence speed, and dry weight are more efficient in predicting the emergence of rice seedlings.”
Claim · model-written summary
Emergence speed was among the more efficient tests for predicting rice seedling emergence.
- Taxon
- riceOryza sativae0
- Treatment
- emergence speede0
- Outcome
- predicting the emergence of rice seedlingse0
- Direction
- more efficiente0
- Comparator
- accelerated aginge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The vigor tests for accelerated aging, emergence speed, and dry weight are more efficient in predicting the emergence of rice seedlings.”
Claim · model-written summary
Dry weight was among the more efficient tests for predicting rice seedling emergence.
- Taxon
- riceOryza sativae0
- Treatment
- dry weighte0
- Outcome
- predicting the emergence of rice seedlingse0
- Direction
- more efficiente0
- Comparator
- accelerated aginge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The vigor tests for accelerated aging, emergence speed, and dry weight are more efficient in predicting the emergence of rice seedlings.”
Claim · model-written summary
Accelerated aging at 41 °C for 120 h was recommended for laboratory quality control and pre-sowing analysis.
- Taxon
- riceOryza sativae0
- Treatment
- accelerated aging (41 °C for 120 h)e0
- Outcome
- best option for laboratory analysis of quality control and pre-sowinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“accelerated aging (41 °C for 120 h) is one of the most efficient for predicting the emergence of rice seedlings and the best option for laboratory analysis of quality control and pre-sowing owing to its practicality and time required for execution.”