Abstract
Cassava is the most cultivated and consumed root crop in the world. One of the major constraints to the cassava value chain is the short shelf life of cassava storage roots which is primarily due to the so-called post-harvest physiological deterioration (PPD). The identification of natural sources of PPD tolerance represents a key approach to mitigating PPD losses by generating farmer- and industry-preferred cassava cultivars with prolonged shelf life. In the present study, a PPD assessment method was developed to screen for PPD tolerance in the cassava germplasm. The proposed PPD assessment method displayed a reduced rate of microbial infection and allowed a rapid and homogenous development of typical PPD symptoms in the cassava storage roots. We successfully used the PPD assessment method in combination with an image-based PPD scoring method to identify and characterize PPD tolerance in 28 cassava cultivars from the Indonesian cassava germplasm. Our analysis showed a significant and positive correlation between PPD score and dry matter content (r = 0.589-0.664, p-value < 0.001). Analysis of additional root parameters showed a significant and positive correlation between PPD scores at 2 days post-harvest (dph) and root length (r = 0.388, p-value < 0.05). Our analysis identified at least 4 cultivars displaying a significantly delayed onset of PPD symptoms as compared to the other selected cultivars. The availability of cassava cultivars contrasting for tolerance to PPD will be particularly instrumental to understanding the molecular mechanisms associated with delayed PPD in cassava roots.
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Claims 6
Claim · model-written summary
PPD score correlated positively with dry matter content in cassava cultivars.
- Taxon
- cassava
Manihot esculentae0 - Material
- cassava cultivarse6
- Treatment
- dry matter contente1
- Outcome
- PPD scoree1
- Direction
- positivee1
- Value
- r = 0.589-0.664e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cassava is the most cultivated and consumed root crop in the world”
e1“Our analysis showed a significant and positive correlation between PPD score and dry matter content (r = 0.589-0.664, p-value < 0.001)”
e6“We successfully used the PPD assessment method in combination with an image-based PPD scoring method to identify and characterize PPD tolerance in 28 cassava cultivars from the Indonesian cassava germplasm”
Claim · model-written summary
PPD score at 2 days post-harvest correlated positively with root length.
- Taxon
- cassavaManihot esculentae0
- Treatment
- root lengthe2
- Outcome
- PPD scores at 2 days post-harvest (dph)e2
- Direction
- positivee2
- Value
- r = 0.388e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cassava is the most cultivated and consumed root crop in the world”
e2“Analysis of additional root parameters showed a significant and positive correlation between PPD scores at 2 days post-harvest (dph) and root length (r = 0.388, p-value < 0.05)”
Claim · model-written summary
At least 4 cassava cultivars showed significantly delayed onset of PPD symptoms compared with the other selected cultivars.
- Taxon
- cassavaManihot esculentae0
- Material
- at least 4 cultivarse3
- Outcome
- onset of PPD symptomse3
- Direction
- delayede3
- Comparator
- the other selected cultivarse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cassava is the most cultivated and consumed root crop in the world”
e3“Our analysis identified at least 4 cultivars displaying a significantly delayed onset of PPD symptoms as compared to the other selected cultivars”
Claim · model-written summary
The PPD assessment method reduced the rate of microbial infection in cassava storage roots.
- Taxon
- cassavaManihot esculentae0
- Outcome
- rate of microbial infectione4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cassava is the most cultivated and consumed root crop in the world”
e4“The proposed PPD assessment method displayed a reduced rate of microbial infection”
Claim · model-written summary
The PPD assessment method allowed rapid and homogenous development of typical PPD symptoms in cassava storage roots.
- Taxon
- cassavaManihot esculentae0
- Organ / stage
- cassava storage rootse5
- Outcome
- development of typical PPD symptomse5
- Qualifier
- rapid and homogenouse5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cassava is the most cultivated and consumed root crop in the world”
e5“allowed a rapid and homogenous development of typical PPD symptoms in the cassava storage roots”
Claim · model-written summary
The combined PPD assay and image-based scoring identified PPD tolerance in 28 cassava cultivars.
- Taxon
- cassavaManihot esculentae0
- Material
- cassava cultivarse6
- Outcome
- PPD tolerancee6
- Value
- 28 cassava cultivarse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cassava is the most cultivated and consumed root crop in the world”
e6“We successfully used the PPD assessment method in combination with an image-based PPD scoring method to identify and characterize PPD tolerance in 28 cassava cultivars from the Indonesian cassava germplasm”