1
|
Karim KY, Ifie B, Dzidzienyo D, Danquah EY, Blay ET, Whyte JBA, Kulakow P, Rabbi I, Parkes E, Omoigui L, Norman PE, Iluebbey P. Genetic characterization of cassava ( Manihot esculenta Crantz) genotypes using agro-morphological and single nucleotide polymorphism markers. Physiol Mol Biol Plants 2020; 26:317-330. [PMID: 32158137 PMCID: PMC7036393 DOI: 10.1007/s12298-019-00740-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 11/15/2019] [Accepted: 11/24/2019] [Indexed: 06/01/2023]
Abstract
Dearth of information on extent of genetic variability in cassava limits the genetic improvement of cassava genotypes in Sierra Leone. The aim of this study was to assess the genetic diversity and relationships within 102 cassava genotypes using agro-morphological and single nucleotide polymorphism markers. Morphological classification based on qualitative traits categorized the germplasm into five different groups, whereas the quantitative trait set had four groups. The SNP markers classified the germplasm into three main cluster groups. A total of seven principal components (PCs) in the qualitative and four PCs in the quantitative trait sets accounted for 79.03% and 72.30% of the total genetic variation, respectively. Significant and positive correlations were observed between average yield per plant and harvest index (r = 0.76***), number of storage roots per plant and harvest index (r = 0.33*), height at first branching and harvest index (0.26*), number of storage roots per plant and average yield per plant (r = 0.58*), height at first branching and average yield per plant (r = 0.24*), length of leaf lobe and petiole length (r = 0.38*), number of leaf lobe and petiole length (r = 0.31*), width of leaf lobe and length of leaf lobe (r = 0.36*), number of leaf lobe and length of leaf lobe (r = 0.43*), starch content and dry matter content (r = 0.99***), number of leaf lobe and root dry matter (r = 0.30*), number of leaf lobe and starch content (r = 0.28*), and height at first branching and plant height (r = 0.45**). Findings are useful for conservation, management, short term recommendation for release and genetic improvement of the crop.
Collapse
Affiliation(s)
- Kumba Y. Karim
- Sierra Leone Agricultural Research Institute, Tower Hill, Freetown, PMB 1313 Sierra Leone
- West Africa Centre for Crop Improvement, College of Basic and Applied Sciences, University of Ghana, P.O. Box LG 30, Legon, Accra, Greater Accra Ghana
| | - Beatrice Ifie
- West Africa Centre for Crop Improvement, College of Basic and Applied Sciences, University of Ghana, P.O. Box LG 30, Legon, Accra, Greater Accra Ghana
| | - Daniel Dzidzienyo
- West Africa Centre for Crop Improvement, College of Basic and Applied Sciences, University of Ghana, P.O. Box LG 30, Legon, Accra, Greater Accra Ghana
| | - Eric Y. Danquah
- West Africa Centre for Crop Improvement, College of Basic and Applied Sciences, University of Ghana, P.O. Box LG 30, Legon, Accra, Greater Accra Ghana
| | - Essie T. Blay
- West Africa Centre for Crop Improvement, College of Basic and Applied Sciences, University of Ghana, P.O. Box LG 30, Legon, Accra, Greater Accra Ghana
| | - Jim B. A. Whyte
- International Institute of Tropical Agriculture, Ibadan, PMB 5320 Nigeria
| | - Peter Kulakow
- International Institute of Tropical Agriculture, Ibadan, PMB 5320 Nigeria
| | - Ismail Rabbi
- International Institute of Tropical Agriculture, Ibadan, PMB 5320 Nigeria
| | - Elizabeth Parkes
- International Institute of Tropical Agriculture, Ibadan, PMB 5320 Nigeria
| | - Lucky Omoigui
- International Institute of Tropical Agriculture, Ibadan, PMB 5320 Nigeria
| | - Prince E. Norman
- Sierra Leone Agricultural Research Institute, Tower Hill, Freetown, PMB 1313 Sierra Leone
- West Africa Centre for Crop Improvement, College of Basic and Applied Sciences, University of Ghana, P.O. Box LG 30, Legon, Accra, Greater Accra Ghana
| | - Peter Iluebbey
- International Institute of Tropical Agriculture, Ibadan, PMB 5320 Nigeria
| |
Collapse
|