Abstract
A total of 226 tomato (Lycopersicon esculentum Mill.) fruits sold in markets within three states in Southwestern Nigeria were purchased and differentiated into 14 varietal groups based on morphological parameters. The genomic DNA from the young apical leaves of the seeded plants were extracted and analyzed by the randomly amplified polymorphic DNA-polymerase chain reaction (RAPD-PCR) technique. Seventy-four (74) amplified products were scored with 62.2% of them revealing polymorphism. The OPB-18 primer recorded the highest polymorphism (83.3%) and OPU-14 the least (44.4%). The dendrogram revealed 3 clusters. The genotypic relationships between varieties within clusters ranged from 2 in clusters 1 and 3 to 10 in cluster 2. Cluster 2 revealed 4 subgroups with two pairs of varieties (var. c and i and l and m) showing 100% similarities. The local names, place of cultivation and phenotypic characters expressed by the varieties were not suitable for varietal differentiation since phenotypically different fruits showed genotypic relatedness. The impression that tomato varieties from a particular geographical zone are genetically similar was therefore nullified. Key words: Tomato, randomly amplified polymorphic DNA, polymerase chain reaction, molecular, genetic diversity, Lycopersicum.
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Claims 10
Claim · model-written summary
Fourteen tomato varietal groups were differentiated by morphology.
- Taxon
- tomato
Solanum lycopersicumt0 - Outcome
- varietal groupse0
- Value
- 14 varietal groupse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“differentiated into 14 varietal groups based on morphological parameters”
t0“tomato”
Claim · model-written summary
Of 74 RAPD amplified products, 62.2% were polymorphic.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- polymorphisme0
- Value
- 62.2%e0
- Qualifier
- Seventy-four (74) amplified productse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seventy-four (74) amplified products were scored with 62.2% of them revealing polymorphism.”
t0“tomato”
Claim · model-written summary
OPB-18 had the highest polymorphism at 83.3%.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- OPB-18e0
- Outcome
- polymorphisme0
- Direction
- higheste0
- Value
- 83.3%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The OPB-18 primer recorded the highest polymorphism (83.3%)”
t0“tomato”
Claim · model-written summary
OPU-14 had the least polymorphism at 44.4%.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“OPU-14 the least (44.4%)”
t0“tomato”
Claim · model-written summary
The tomato variety dendrogram contained three clusters.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- clusterse0
- Value
- 3 clusterse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The dendrogram revealed 3 clusters.”
t0“tomato”
Claim · model-written summary
Genotypic relationships within clusters ranged from 2 in clusters 1 and 3 to 10 in cluster 2.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- genotypic relationships between varieties within clusterse0
- Value
- 2 in clusters 1 and 3 to 10 in cluster 2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The genotypic relationships between varieties within clusters ranged from 2 in clusters 1 and 3 to 10 in cluster 2.”
t0“tomato”
Claim · model-written summary
Cluster 2 had four subgroups.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- subgroupse0
- Value
- 4 subgroupse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cluster 2 revealed 4 subgroups”
t0“tomato”
Claim · model-written summary
Variety pairs c and i and l and m had 100% genetic similarity.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- var. c and i and l and me0
- Outcome
- similaritiese0
- Value
- 100%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two pairs of varieties (var. c and i and l and m) showing 100% similarities”
t0“tomato”
Claim · model-written summary
Local names, cultivation place and phenotype were unsuitable for varietal differentiation because phenotypically different fruits were genetically related.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- varietal differentiatione0
- Qualifier
- phenotypically different fruits showed genotypic relatednesse0
- Comparator
- local names, place of cultivation and phenotypic characterse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The local names, place of cultivation and phenotypic characters expressed by the varieties were not suitable for varietal differentiation since phenotypically different fruits showed genotypic relatedness.”
t0“tomato”
Claim · model-written summary
Tomato varieties from the same geographic zone were not necessarily genetically similar.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- genetically similare0
- Direction
- nullifiede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The impression that tomato varieties from a particular geographical zone are genetically similar was therefore nullified.”