Abstract
Summary Bambara groundnut ( Vigna subterranea ) is an underexploited legume indigenous to sub-Saharan Africa with high protein content. Production constraints of Bambara groundnut include the root-knot nematodes ( Meloidogyne spp.), which causes substantial losses that present an additional burden that growers need to manage. In this study we: i ) assessed genetic resistance against Meloidogyne incognita in Bambara groundnut; and ii ) evaluated an improved, more efficient screening method for Bambara. Fifty accessions were evaluated in two screenhouse trials. Following this, the use of seedling pouches was assessed for a high throughput screening method, using two accessions identified from each of three host status categories (resistant, tolerant and susceptible). Variability in host response was observed between the trials but five accessions demonstrated good resistance to M. incognita . A general reduction in plant growth parameters was observed on inoculated plants, especially for chlorophyll content at 11 weeks after planting. The pouch screening system confirmed the screenhouse pot results but appears to be more sensitive. From a range of inocula no differences in gall index were observed over the 28 days of assessment in pouches but the number of egg masses proved a useful parameter and differed between inoculum levels, with 500 juveniles/eggs determined as the optimum inoculum level. The use of seedling pouches reduced time, space and cost to screen Bambara groundnuts for resistance against M. incognita . Consequently, it is recommended as an efficient, high throughput, rapid screening protocol for Bambara groundnut compared to conventional pot screening methods.
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Claims 8
Claim · model-written summary
Five Bambara groundnut accessions resisted M. incognita.
- Taxon
- Bambara groundnut
Vigna subterraneat0 - Material
- five accessionse0
- Interactor
- M. incognita
_penetrates_a_tomato_root_-_USDA-ARS.jpg?width=60)
Meloidogyne incognitae0pathogen - Outcome
- good resistancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_penetrates_a_tomato_root_-_USDA-ARS.jpg?width=500)
Verbatim
e0“five accessions demonstrated good resistance to M. incognita”
t0“Bambara groundnut”
Claim · model-written summary
Inoculation generally reduced plant growth parameters, especially chlorophyll content at 11 weeks.
- Taxon
- Bambara groundnutVigna subterraneat0
- Treatment
- inoculated plantse0
- Outcome
- plant growth parameterse0
- Direction
- reductione0
- Qualifier
- especially for chlorophyll content at 11 weeks after plantinge0
Not reportedInteractorComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A general reduction in plant growth parameters was observed on inoculated plants, especially for chlorophyll content at 11 weeks after planting”
t0“Bambara groundnut”
Claim · model-written summary
Pouch screening confirmed screenhouse results and appeared more sensitive.
- Taxon
- Bambara groundnutVigna subterraneat0
- Outcome
- more sensitivee0
- Direction
- more sensitivee0
- Comparator
- screenhouse pot resultse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The pouch screening system confirmed the screenhouse pot results but appears to be more sensitive”
t0“Bambara groundnut”
Claim · model-written summary
Gall index did not differ across inoculum levels during 28 days in pouches.
- Taxon
- Bambara groundnutVigna subterraneat0
- Outcome
- gall indexe0
- Direction
- no differencese0
- Qualifier
- over the 28 days of assessment in pouchese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“From a range of inocula no differences in gall index were observed over the 28 days of assessment in pouches”
t0“Bambara groundnut”
Claim · model-written summary
Egg mass numbers differed among inoculum levels.
- Taxon
- Bambara groundnutVigna subterraneat0
- Treatment
- inoculum levelse0
- Outcome
- number of egg massese0
Not reportedInteractorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the number of egg masses proved a useful parameter and differed between inoculum levels”
t0“Bambara groundnut”
Claim · model-written summary
The optimum pouch inoculum was 500 juveniles or eggs.
- Taxon
- Bambara groundnutVigna subterraneat0
- Outcome
- optimum inoculum levele0
- Value
- 500 juveniles/eggse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with 500 juveniles/eggs determined as the optimum inoculum level”
t0“Bambara groundnut”
Claim · model-written summary
Seedling pouches reduced screening time, space and cost.
- Taxon
- Bambara groundnutsVigna subterraneae0
- Interactor
- M. incognitaMeloidogyne incognitae0pathogen
- Outcome
- time, space and coste0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of seedling pouches reduced time, space and cost to screen Bambara groundnuts for resistance against M. incognita”
Claim · model-written summary
The authors recommend seedling pouches as a rapid, efficient high-throughput screening protocol.
- Taxon
- Bambara groundnutVigna subterraneae0
- Outcome
- efficient, high throughput, rapid screening protocole0
- Comparator
- conventional pot screening methodse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it is recommended as an efficient, high throughput, rapid screening protocol for Bambara groundnut compared to conventional pot screening methods”
The same questions in other papers
inoculation · growth · Vigna subterranea (Bambara groundnut)Positive and negative results
4 in the opposite direction
- positive
- positive
- 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.