TY - JOUR
T1 - Molecular and phenotypic diversity of groundnut (Arachis hypogaea L.) cultivars in Togo
AU - Banla, Essohouna Modom
AU - Dzidzienyo, Daniel Kwadjo
AU - Diangar, Mouhamadou Moussa
AU - Melomey, Leander Dede
AU - Offei, Samuel Kwame
AU - Tongoona, Pangirayi
AU - Desmae, Haile
N1 - Publisher Copyright:
© 2020, Prof. H.S. Srivastava Foundation for Science and Society.
PY - 2020/7/1
Y1 - 2020/7/1
N2 - 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.
AB - 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.
KW - Agro-morphological
KW - Diversity
KW - Groundnut
KW - Molecular
KW - SNP
UR - http://www.scopus.com/inward/record.url?scp=85086832219&partnerID=8YFLogxK
U2 - 10.1007/s12298-020-00837-8
DO - 10.1007/s12298-020-00837-8
M3 - Article
AN - SCOPUS:85086832219
SN - 0971-5894
VL - 26
SP - 1489
EP - 1504
JO - Physiology and Molecular Biology of Plants
JF - Physiology and Molecular Biology of Plants
IS - 7
ER -