Abstract
The nodulation response of the Trifolium subterraneum variety Northam First Early with a range of strains of root nodule bacteria has been investigated. An ineffective response was found with the normally effective bacterial strain NA30. Within F2 populations of crosses between Northam First Early and each of six other varieties of T. subterraneum, the response to inoculation with strain NA30 varied from fully ineffective through intermediate effectiveness to fully effective. The proportion of ineffectively noddated plants in these F, populations was also influenced by the non- Northam First Early parent variety. Differences in response among individual plants within the F, populations were probably due to the segregation of a single major gene and a number of modifying genes. Of 10 other strains examined, one strain showed a similar pattern of response to that obtained with NA30, while a second strain exhibited host x strain specific ineffectiveness of a different type.
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Claims 6
Claim · model-written summary
The NA30 bacterial strain produced ineffective nodulation in Northam First Early clover.
- Taxon
- Trifolium subterraneum
Trifolium subterraneume1 - Material
- Northam First Earlye1
- Interactor
- bacterial strain NA30e0symbiont
- Outcome
- ineffective responsee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An ineffective response was found with the normally effective bacterial strain NA30”
e1“Trifolium subterraneum variety Northam First Early”
Claim · model-written summary
NA30 inoculation responses in F2 crosses ranged from ineffective to fully effective.
- Taxon
- T. subterraneumTrifolium subterraneume0
- Material
- F2 populationse0
- Treatment
- inoculation with strain NA30e0
- Interactor
- strain NA30e0symbiont
- Outcome
- response to inoculation with strain NA30e0
- Direction
- varied from fully ineffective through intermediate effectiveness to fully effectivee0
- Comparator
- six other varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Within F2 populations of crosses between Northam First Early and each of six other varieties of T. subterraneum, the response to inoculation with strain NA30 varied from fully ineffective through intermediate effectiveness to fully effective”
Claim · model-written summary
The other parent variety influenced the proportion of ineffective plants in F2 populations.
- Taxon
- T. subterraneumTrifolium subterraneume1
- Material
- non- Northam First Early parent varietye0
- Outcome
- proportion of ineffectively noddated plantse0
- Direction
- influencede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The proportion of ineffectively noddated plants in these F, populations was also influenced by the non- Northam First Early parent variety”
e1“T. subterraneum”
Claim · model-written summary
The authors attributed individual differences to segregation of one major and several modifying genes.
- Taxon
- T. subterraneumTrifolium subterraneume1
- Gene
- a single major gene and a number of modifying genese0
- Outcome
- Differences in response among individual plantse0
- Qualifier
- probablye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Differences in response among individual plants within the F, populations were probably due to the segregation of a single major gene and a number of modifying genes”
e1“T. subterraneum”
Claim · model-written summary
One other bacterial strain showed an NA30-like response pattern.
- Taxon
- T. subterraneumTrifolium subterraneume1
- Interactor
- one straine0symbiont
- Outcome
- pattern of responsee0
- Direction
- similare0
- Comparator
- NA30e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Of 10 other strains examined, one strain showed a similar pattern of response to that obtained with NA30”
e1“T. subterraneum”
Claim · model-written summary
A second strain produced a different form of host by strain specific ineffectiveness.
- Taxon
- T. subterraneumTrifolium subterraneume1
- Interactor
- a second straine0symbiont
- Outcome
- host x strain specific ineffectivenesse0
- Direction
- different typee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a second strain exhibited host x strain specific ineffectiveness of a different type”
e1“T. subterraneum”