Abstract
Male sterility is a unique application in the production of F1 hybrid seeds of some important species. Today, while F1 hybrid lettuce varieties of abroad origin take their place in the Türkiye seed market, unfortunately, we do not have a native F1 hybrid variety. Besides, F1 hybrid seed production has become a prestige for multi-national companies regardless of the type of vegetable. Within this perspective, the effects of some chemical hybridizing agents (CHAs) such as E4FO, Ethrel and GA3 on male sterilizing activity in lettuce cultivars (Maylight352 F1, Presidential and Yedikule) were evaluated. Therefore, pollen presence in the early bud stage, seed formation and seed viability (germination) were examined. The applications had different effects on pollen presence, seed formation and seed germination, and thus male sterility. Ethrel was not effective at low doses, but at high doses, it caused flower bud deformation and growth retardation. E4FO is partially effective, but the application doses are low. Therefore, E4FO should be used at higher than 1500 ppm and 2000 ppm. GA3 applications produced the best results in stimulating male sterility, and full sterility (% 100) was achieved from 200, 250 and 300 ppm in all cultivars. As a result, 200 ppm GA3 was determined as the recommendable dose in the production of Fı hybrid lettuce.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc. 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 9
Claim · model-written summary
Applications differed in pollen presence, seed formation, seed germination and male sterility.
- Taxon
- Lettuce (Lactuca Sativa Var. Longifolia)
Lactuca sativa var. longifoliat0 - Outcome
- pollen presence, seed formation and seed germinatione0
- Direction
- different effectse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca Sativa Var. Longifolia)”
e0“The applications had different effects on pollen presence, seed formation and seed germination, and thus male sterility”
Claim · model-written summary
Ethrel was ineffective at low doses for male sterility.
- Taxon
- Lettuce (Lactuca Sativa Var. Longifolia)Lactuca sativa var. longifoliat0
- Treatment
- Ethrele0
- Outcome
- male sterilitye1
- Direction
- not effectivee0
- Qualifier
- low dosese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca Sativa Var. Longifolia)”
e0“Ethrel was not effective at low doses”
e1“and thus male sterility”
Claim · model-written summary
High-dose Ethrel caused flower bud deformation.
- Taxon
- Lettuce (Lactuca Sativa Var. Longifolia)Lactuca sativa var. longifoliat0
- Treatment
- Ethrele1
- Outcome
- flower bud deformatione0
- Qualifier
- high dosese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca Sativa Var. Longifolia)”
e0“at high doses, it caused flower bud deformation and growth retardation”
e1“Ethrel was not effective at low doses”
Claim · model-written summary
High-dose Ethrel caused growth retardation.
- Taxon
- Lettuce (Lactuca Sativa Var. Longifolia)Lactuca sativa var. longifoliat0
- Treatment
- Ethrele1
- Outcome
- growth retardatione0
- Direction
- retardatione0
- Qualifier
- high dosese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca Sativa Var. Longifolia)”
e0“at high doses, it caused flower bud deformation and growth retardation”
e1“Ethrel was not effective at low doses”
Claim · model-written summary
E4FO was partially effective at the tested low doses.
- Taxon
- Lettuce (Lactuca Sativa Var. Longifolia)Lactuca sativa var. longifoliat0
- Treatment
- E4FOe0
- Outcome
- partially effectivee0
- Direction
- partially effectivee0
- Qualifier
- application doses are lowe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca Sativa Var. Longifolia)”
e0“E4FO is partially effective, but the application doses are low”
Claim · model-written summary
The authors recommend E4FO doses above 1500 and 2000 ppm.
- Taxon
- Lettuce (Lactuca Sativa Var. Longifolia)Lactuca sativa var. longifoliat0
- Treatment
- E4FOe0
- Outcome
- used at higher than 1500 ppm and 2000 ppme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca Sativa Var. Longifolia)”
e0“E4FO should be used at higher than 1500 ppm and 2000 ppm”
Claim · model-written summary
GA3 produced the best male-sterility results.
- Taxon
- Lettuce (Lactuca Sativa Var. Longifolia)Lactuca sativa var. longifoliat0
- Treatment
- GA3 applicationse0
- Outcome
- male sterilitye0
- Direction
- beste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca Sativa Var. Longifolia)”
e0“GA3 applications produced the best results in stimulating male sterility”
Claim · model-written summary
GA3 at 200 ppm achieved 100% male sterility in all cultivars.
- Taxon
- Lettuce (Lactuca Sativa Var. Longifolia)Lactuca sativa var. longifoliat0
- Treatment
- GA3e1
- Outcome
- full sterilitye0
- Value
- % 100e0
- Qualifier
- 200, 250 and 300 ppm in all cultivarse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca Sativa Var. Longifolia)”
e0“full sterility (% 100) was achieved from 200, 250 and 300 ppm in all cultivars”
e1“GA3 applications produced the best results”
Claim · model-written summary
The authors recommend 200 ppm GA3 for F1 hybrid lettuce production.
- Taxon
- lettuce
Lactuca sativae0 - Treatment
- 200 ppm GA3e0
- Outcome
- recommendable dose in the production of Fı hybrid lettucee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca Sativa Var. Longifolia)”
e0“200 ppm GA3 was determined as the recommendable dose in the production of Fı hybrid lettuce”
The same questions in other papers
(2-chloroethyl)phosphonic acid · growth · Lactuca sativa (garden lettuce)Results differ
2 papers in the same direction as this paper · 5 in the opposite direction
- positive
- positive
- positive
4 papers more in this group
See all 8 papers →Gibberellic acid · nutrient: content · Lactuca sativa (garden lettuce)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
- positive
1 paper more in this group
See all 5 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.