Abstract
Cassava is a tropical crop that provides daily carbohydrates to more than 800 million people. New cassava cultivars with improved yield, disease resistance, and food quality are critical to end hunger and reduce poverty in the tropics. However, the progress of new cultivar development has been dragged down by difficulties obtaining flowers from desired parental plants to enable designed crosses. Inducing early flowering and increasing seed production are crucial to improving the efficiency of developing farmer-preferred cultivars. In the present study, we used breeding progenitors to evaluate the effectiveness of flower-inducing technology, including photoperiod extension, pruning, and plant growth regulators. Photoperiod extension significantly reduced the time to flowering in all 150 breeding progenitors, especially late-flowering progenitors which were reduced from 6-7 months to 3-4 months. Seed production was increased by using the combination of pruning and plant growth regulators. Combining photoperiod extension with pruning and the PGR 6-benzyladenine (synthetic cytokinin) produced significantly more fruits and seeds than only photoperiod extension and pruning. Another growth regulator, silver thiosulfate, commonly used to block the action of ethylene, did not show a significant effect on fruit or seed production when combined with pruning. The present study validated a protocol for flower induction in cassava breeding programs and discussed factors to consider in implementing the technology. By inducing early flowering and increasing seed production, the protocol helped move one step further for speed breeding in cassava.
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Claims 6
Claim · model-written summary
Photoperiod extension significantly reduced flowering time in all 150 cassava breeding progenitors.
- Taxon
- Cassava
Manihot esculentat0 - Treatment
- Photoperiod extensione0
- Outcome
- time to floweringe0
- Direction
- reducede0
- Value
- 150 breeding progenitorse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Photoperiod extension significantly reduced the time to flowering in all 150 breeding progenitors, especially late-flowering progenitors which were reduced from 6-7 months to 3-4 months.”
t0“Cassava”
Claim · model-written summary
In late-flowering cassava progenitors, photoperiod extension reduced flowering time from 6-7 months to 3-4 months.
- Taxon
- CassavaManihot esculentat0
- Treatment
- Photoperiod extensione0
- Outcome
- time to floweringe0
- Direction
- reducede0
- Value
- 3-4 monthse0
- Qualifier
- 6-7 monthse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Photoperiod extension significantly reduced the time to flowering in all 150 breeding progenitors, especially late-flowering progenitors which were reduced from 6-7 months to 3-4 months.”
t0“Cassava”
Claim · model-written summary
Combining pruning and plant growth regulators increased cassava seed production.
- Taxon
- CassavaManihot esculentat0
- Treatment
- combination of pruning and plant growth regulatorse0
- Outcome
- Seed productione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed production was increased by using the combination of pruning and plant growth regulators.”
t0“Cassava”
Claim · model-written summary
Adding 6-benzyladenine to photoperiod extension and pruning produced significantly more cassava fruits and seeds.
- Taxon
- CassavaManihot esculentat0
- Treatment
- photoperiod extension with pruning and the PGR 6-benzyladeninee0
- Outcome
- fruits and seedse0
- Direction
- moree0
- Comparator
- only photoperiod extension and pruninge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Combining photoperiod extension with pruning and the PGR 6-benzyladenine (synthetic cytokinin) produced significantly more fruits and seeds than only photoperiod extension and pruning.”
t0“Cassava”
Claim · model-written summary
Silver thiosulfate combined with pruning had no significant effect on cassava fruit or seed production.
- Taxon
- CassavaManihot esculentat0
- Treatment
- silver thiosulfatee0
- Outcome
- fruit or seed productione0
- Direction
- no_changeinferrede0
- Qualifier
- combined with pruninge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Another growth regulator, silver thiosulfate, commonly used to block the action of ethylene, did not show a significant effect on fruit or seed production when combined with pruning.”
t0“Cassava”
Claim · model-written summary
The flower-induction protocol helped advance speed breeding in cassava.
- Taxon
- cassavaManihot esculentae0
- Outcome
- speed breedinge0
- Value
- one step furthere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“By inducing early flowering and increasing seed production, the protocol helped move one step further for speed breeding in cassava.”
The same questions in other papers
thiosulfate · yield · Manihot esculenta (cassava)Positive and negative results
1 in the opposite direction
- positive
silver atom · yield · Manihot esculenta (cassava)Positive and negative results
2 in the opposite direction
- positive
- positive
pruning · yield · Manihot esculenta (cassava)Results differ
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- positive
- positive
- negative
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See all 26 papers →class · yield · Manihot esculenta (cassava)Results agree
2 papers in the same direction as this paper
- positive
- positive
light · phenology · Manihot esculenta (cassava)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
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.