Abstract
One of the major problems in hybrid seed production of cucumbers is the low pollen production and low pollen viability. This research was mainly dealt with pollen handling in order to maintain its viability during storage, which was carried out in three steps. Male parental of 'KE014' was planted at Production Farm of East West Seed Indonesia Ltd. in Jember, East Java, Indonesia during March to September 2012. In a first step, male flowers were harvested and pollen was extracted and dried for 24 h during which the water content and pollen viability was monitored. In a second step the dried pollen was stored in an ultra-freezer (-79±2°C) for 56 days and its viability was also monitored every 7 days. The third step was the pollination of a female parental stock to produce hybrid seed. The experiments were arranged in three replications with completely randomized design. Results showed that pollen water content decreased significantly during the first 8 h of drying from 12.05 to 6.71% while the pollen viability increased from 10.16 to 25.60%. Prolonged pollen drying time up to 24 h did not substantially reduce the water content. Pollen dried for 8 h was able to maintain its viability during 56 days of storage in ultra-freezer (-79±2°C) better than those undried or dried longer. The fruit set and seed set got from pollination with undried and stored pollen (11.0 and 23.0%, respectively) was lower than fruit set and seed set got with dried and stored pollen (ranged 46.5-58.9 and 52.0-67.8%, respectively). Using stored pollen (undried or dried) for pollination in hybrid seed production yielded in lower number of filled seed per fruit than using fresh pollen. Hybrid seed germination got from pollination with dried and stored pollen was slightly higher (98.36-99.63%) than those got from undried and stored pollen (95.58%), nevertheless all of them were high quality seeds. Thus, using the stored pollen for pollination in cucumber hybrid seed production would reduce seed yield but not seed quality.
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Claims 9
Claim · model-written summary
During the first eight hours of drying, cucumber pollen water content fell from 12.05 to 6.71%.
- Taxon
- cucumber
Cucumis sativust0 - Treatment
- first 8 h of dryinge0
- Outcome
- pollen water contente0
- Direction
- decreasede0
- Value
- 12.05 to 6.71%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pollen water content decreased significantly during the first 8 h of drying from 12.05 to 6.71%”
t0“cucumber”
Claim · model-written summary
Cucumber pollen viability rose from 10.16 to 25.60% during the first eight hours of drying.
- Taxon
- cucumberCucumis sativust0
- Treatment
- first 8 h of dryinge0
- Outcome
- pollen viabilitye0
- Direction
- increasede0
- Value
- 10.16 to 25.60%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“during the first 8 h of drying from 12.05 to 6.71% while the pollen viability increased from 10.16 to 25.60%”
t0“cucumber”
Claim · model-written summary
Extending cucumber pollen drying to 24 hours did not substantially reduce water content.
- Taxon
- cucumberCucumis sativust0
- Treatment
- pollen drying time up to 24 he0
- Outcome
- water contente0
- Direction
- did not substantially reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Prolonged pollen drying time up to 24 h did not substantially reduce the water content”
t0“cucumber”
Claim · model-written summary
Cucumber pollen dried for eight hours retained viability across 56 days of freezer storage better than undried or longer dried pollen.
- Taxon
- cucumberCucumis sativust0
- Treatment
- Pollen dried for 8 he0
- Outcome
- viabilitye0
- Direction
- better thane0
- Qualifier
- 56 days of storage in ultra-freezer (-79±2°C)e0
- Comparator
- those undried or dried longere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pollen dried for 8 h was able to maintain its viability during 56 days of storage in ultra-freezer (-79±2°C) better than those undried or dried longer”
t0“cucumber”
Claim · model-written summary
Undried stored cucumber pollen produced lower fruit set than dried stored pollen: 11.0% versus 46.5-58.9%.
- Taxon
- cucumberCucumis sativust0
- Treatment
- undried and stored pollene0
- Outcome
- fruit sete0
- Direction
- lowere0
- Value
- 11.0e0
- Qualifier
- 46.5-58.9e0
- Comparator
- dried and stored pollene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The fruit set and seed set got from pollination with undried and stored pollen (11.0 and 23.0%, respectively) was lower than fruit set and seed set got with dried and stored pollen (ranged 46.5-58.9 and 52.0-67.8%, respectively)”
t0“cucumber”
Claim · model-written summary
Undried stored cucumber pollen produced lower seed set than dried stored pollen: 23.0% versus 52.0-67.8%.
- Taxon
- cucumberCucumis sativust0
- Treatment
- undried and stored pollene0
- Outcome
- seed sete0
- Direction
- lowere0
- Value
- 23.0%e0
- Qualifier
- 52.0-67.8%e0
- Comparator
- dried and stored pollene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The fruit set and seed set got from pollination with undried and stored pollen (11.0 and 23.0%, respectively) was lower than fruit set and seed set got with dried and stored pollen (ranged 46.5-58.9 and 52.0-67.8%, respectively)”
t0“cucumber”
Claim · model-written summary
Stored cucumber pollen yielded fewer filled seeds per fruit than fresh pollen.
- Taxon
- cucumberCucumis sativust0
- Treatment
- stored pollen (undried or dried)e0
- Outcome
- number of filled seed per fruite0
- Direction
- lowere0
- Comparator
- fresh pollene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Using stored pollen (undried or dried) for pollination in hybrid seed production yielded in lower number of filled seed per fruit than using fresh pollen”
t0“cucumber”
Claim · model-written summary
Hybrid cucumber seed from dried stored pollen germinated slightly better than seed from undried stored pollen, 98.36-99.63% versus 95.58%.
- Taxon
- cucumberCucumis sativust0
- Treatment
- dried and stored pollene0
- Outcome
- Hybrid seed germinatione0
- Direction
- slightly highere0
- Value
- 98.36-99.63%e0
- Qualifier
- 95.58%e0
- Comparator
- undried and stored pollene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hybrid seed germination got from pollination with dried and stored pollen was slightly higher (98.36-99.63%) than those got from undried and stored pollen (95.58%)”
t0“cucumber”
Claim · model-written summary
Authors conclude stored pollen reduces cucumber hybrid seed yield while maintaining seed quality.
- Taxon
- cucumberCucumis sativuse0
- Outcome
- reduce seed yield but not seed qualitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“using the stored pollen for pollination in cucumber hybrid seed production would reduce seed yield but not seed quality”
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