Molecular and phenotypic diversity of groundnut (
Agro-morphological
Diversity
Groundnut
Molecular
SNP
Journal
Physiology and molecular biology of plants : an international journal of functional plant biology
ISSN: 0971-5894
Titre abrégé: Physiol Mol Biol Plants
Pays: India
ID NLM: 101304333
Informations de publication
Date de publication:
Jul 2020
Jul 2020
Historique:
received:
06
02
2020
revised:
22
04
2020
accepted:
07
06
2020
entrez:
11
7
2020
pubmed:
11
7
2020
medline:
11
7
2020
Statut:
ppublish
Résumé
Diversity assessment of 94 groundnut accessions from Togo and Senegal, using agro-morphological and SNP markers, revealed high variability for many quantitative traits such as late leaf spot (LLS) incidence, number of pods per plant and yield per plant. For qualitative traits, the Simpson Index showed high diversity for primary seed colour (0.75), stem pigmentation (0.60), and Growth habit (0.59). Principal component analysis underscored quantitative traits such as hundred seed weight, days to maturity, and LLS incidence, as the main traits contributing to the divergence. Correlation and path coefficient analysis showed that the number of pods per plant was the main yield-related trait positively affecting yield (r = 0.95, PC = 0.84; p = 0.01). Overall, 990 SNP markers revealed moderate genetic variability in the genotypes and the percentage of heterozygous genotypes varied from 0 to 50% for all loci. Analysis of molecular variance revealed that only 1.1% of the total molecular variance accounted for geographical contribution to the diversity. Co-analysis of phenotypic and SNP data delineated three clusters harbouring useful alleles and interesting phenotypic features such as LLS resistance, large number of pods per plant and early maturity indicating that differences observed at the phenotypic level are underlined by genotypic differences. The phenotypic and genotypic diversity observed could be exploited for the identification of parents with preferred traits for use in the breeding program. However, the low population structure highlights the necessity to improve groundnut diversity in Togo through introduction from various sources.
Identifiants
pubmed: 32647463
doi: 10.1007/s12298-020-00837-8
pii: 837
pmc: PMC7326882
doi:
Types de publication
Journal Article
Langues
eng
Pagination
1489-1504Informations de copyright
© Prof. H.S. Srivastava Foundation for Science and Society 2020.
Déclaration de conflit d'intérêts
Conflicts of interestThe authors declare that they have no competing interests.
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