Abstract
This study aimed to screen and identify submergence-tolerant rice genotypes from the Fedearroz germplasm bank in Colombia by evaluating their survival rates and growth parameters, with the goal of considering them as potential parents in plant breeding programs. In a preliminary experiment, 368 genotypes were subjected to submergence stress for 21 d during germination. Four genotypes (FL11338, FL17927, FL17938, and FL17813) had survival rates above 70%, suggesting seed and seedling tolerance. In the second experiment, the tolerant genotypes chosen in the previous test, along with tolerant (Khao Hlan On) and susceptible (IR-42) controls, were further evaluated for survival rate, seedling growth, and morpho-agronomic, industrial, and culinary traits. The stressed genotype/control genotype (S/C) ratio showed that submergence stress negatively affected the genotype IR-42, which showed the greatest negative difference in survival percentage (SP) (-1.33) compared to the other genotypes [Khao Hlan On (-0.31), FL11338 (-0.42), FL17927 (-0.28), FL17938 (-0.4), and FL17813 (-0.33)]. The recovery capacity of tolerant genotypes was notable, as they completed their life cycle with no differences in morpho-agronomic traits, yield components, or culinary characteristics compared with the controls. Survival rate and plant height were identified as key physiological attributes for assessing submergence tolerance during germination in rice breeding programs. This study provides valuable insights into the response of rice genotypes to submergence stress in Colombia and Latin America during the germination phase, as it identifies promising tolerant genotypes for use in breeding programs to develop direct-seeded rice cultivars adapted to excessive water availability during the germination phase.
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Claims 10
Claim · model-written summary
FL11338, FL17927, FL17938 and FL17813 each exceeded 70% survival after 21 days of submergence.
- Taxon
- rice
Oryza sativat0 - Material
- FL11338, FL17927, FL17938, and FL17813e0
- Outcome
- survival ratese0
- Value
- above 70%e0
- Qualifier
- 21 d during germinatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“Four genotypes (FL11338, FL17927, FL17938, and FL17813) had survival rates above 70%”
e1“submergence stress for 21 d during germination”
Claim · model-written summary
IR-42 had the greatest negative survival difference under submergence, at -1.33.
- Taxon
- riceOryza sativat0
- Material
- IR-42e0
- Treatment
- submergence stresse0
- Outcome
- survival percentage (SP)e0
- Direction
- negative differencee0
- Value
- -1.33e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“submergence stress negatively affected the genotype IR-42, which showed the greatest negative difference in survival percentage (SP) (-1.33)”
Claim · model-written summary
Khao Hlan On had a stressed to control survival difference of -0.31.
- Taxon
- riceOryza sativat0
- Material
- Khao Hlan One0
- Outcome
- Khao Hlan One0
- Value
- -0.31e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“Khao Hlan On (-0.31)”
Claim · model-written summary
FL11338 had a stressed to control survival difference of -0.42.
- Taxon
- riceOryza sativat0
- Material
- FL11338e0
- Outcome
- FL11338e0
- Value
- -0.42e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“FL11338 (-0.42)”
Claim · model-written summary
FL17927 had a stressed to control survival difference of -0.28.
- Taxon
- riceOryza sativat0
- Material
- FL17927e0
- Outcome
- FL17927e0
- Value
- -0.28e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“FL17927 (-0.28)”
Claim · model-written summary
FL17938 had a stressed to control survival difference of -0.4.
- Taxon
- riceOryza sativat0
- Material
- FL17938e0
- Outcome
- FL17938e0
- Value
- -0.4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“FL17938 (-0.4)”
Claim · model-written summary
FL17813 had a stressed to control survival difference of -0.33.
- Taxon
- riceOryza sativat0
- Material
- FL17813e0
- Outcome
- FL17813e0
- Value
- -0.33e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“FL17813 (-0.33)”
Claim · model-written summary
Tolerant genotypes completed their life cycle without differences in agronomic, yield or culinary traits relative to controls.
- Taxon
- riceOryza sativat0
- Outcome
- morpho-agronomic traits, yield components, or culinary characteristicse0
- Direction
- no differencese0
- Comparator
- the controlse0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“tolerant genotypes was notable, as they completed their life cycle with no differences in morpho-agronomic traits, yield components, or culinary characteristics compared with the controls”
Claim · model-written summary
Survival rate and plant height were identified as key attributes for evaluating submergence tolerance.
- Taxon
- riceOryza sativat0
- Outcome
- key physiological attributese0
- Qualifier
- during germination in rice breeding programse0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“Survival rate and plant height were identified as key physiological attributes for assessing submergence tolerance during germination in rice breeding programs”
Claim · model-written summary
The identified tolerant genotypes were proposed as breeding parents for direct-seeded rice adapted to excess water.
- Taxon
- riceOryza sativat0
- Outcome
- use in breeding programse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“identifies promising tolerant genotypes for use in breeding programs to develop direct-seeded rice cultivars adapted to excessive water availability during the germination phase”
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