Diversity assessment of sweetpotato germplasm collections for yield and yield-related traits in western Tanzania
The experimental system: Sweetpotato (Ipomoea batatas [L.] Lam.) is an important food crop widely grown under low input production systems and harsh growing environments. It is a relatively drought tolerant crop attaining higher biomass production per unit area. Genetic diversity present in breeding...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2018-02-01
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| Series: | Acta Agriculturae Scandinavica. Section B, Soil and Plant Science |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/09064710.2017.1372516 |
| _version_ | 1797684384598327296 |
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| author | Filson Mbezi Kagimbo Hussein Shimelis Julia Sibiya |
| author_facet | Filson Mbezi Kagimbo Hussein Shimelis Julia Sibiya |
| author_sort | Filson Mbezi Kagimbo |
| collection | DOAJ |
| description | The experimental system: Sweetpotato (Ipomoea batatas [L.] Lam.) is an important food crop widely grown under low input production systems and harsh growing environments. It is a relatively drought tolerant crop attaining higher biomass production per unit area. Genetic diversity present in breeding populations is a raw material for selection of parental genotypes with desirable and complementary traits. The objective of this study was to determine the genetic diversity present among Tanzania grown sweetpotato germplasm to select promising breeding parents with enhanced yield and yield-related traits and dry matter content. Procedures: Seventy six sweetpotato accessions collected from Tanzania and 20 sweetpotato accessions received from International Potato Centre (CIP) in Lima/Peru were characterized in two seasons. The study was conducted using a 16 x 6 triple lattice design. The data collected included 16 morphological traits using CIPs standard descriptors. Data were analysed using multivariate procedure including cluster analysis and principle component analysis. Results and conclusions: The tested sweetpotato collections differed significantly for storage root yield, dry matter content (DMC) and number of roots per plot. Genotypes New Kawogo, Kiti cha Nyerere and Kisu cha Masai had the highest root yields whereas genotypes Ngw’anangusa, Rugomoka and Secondary had significantly higher mean DMC. Traits considered in the study revealed positive and significant correlations. The first four principal components accounted for 69.33% of the variations present in the tested sweetpotato genotypes. Cluster analysis grouped the studied genotypes into two major classes with genetic diversity of 0.54. The selected genotypes can be recommended for future breeding programs to bolster yield and dry matter content of sweetpotato under western Tanzania conditions. |
| first_indexed | 2024-03-12T00:29:52Z |
| format | Article |
| id | doaj.art-26d14205eca84cbfae2109965972ad4c |
| institution | Directory Open Access Journal |
| issn | 0906-4710 1651-1913 |
| language | English |
| last_indexed | 2024-03-12T00:29:52Z |
| publishDate | 2018-02-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Acta Agriculturae Scandinavica. Section B, Soil and Plant Science |
| spelling | doaj.art-26d14205eca84cbfae2109965972ad4c2023-09-15T10:21:32ZengTaylor & Francis GroupActa Agriculturae Scandinavica. Section B, Soil and Plant Science0906-47101651-19132018-02-0168212112910.1080/09064710.2017.13725161372516Diversity assessment of sweetpotato germplasm collections for yield and yield-related traits in western TanzaniaFilson Mbezi Kagimbo0Hussein Shimelis1Julia Sibiya2College of Agriculture, Engineering and Science, University of KwaZulu-NatalCollege of Agriculture, Engineering and Science, University of KwaZulu-NatalCollege of Agriculture, Engineering and Science, University of KwaZulu-NatalThe experimental system: Sweetpotato (Ipomoea batatas [L.] Lam.) is an important food crop widely grown under low input production systems and harsh growing environments. It is a relatively drought tolerant crop attaining higher biomass production per unit area. Genetic diversity present in breeding populations is a raw material for selection of parental genotypes with desirable and complementary traits. The objective of this study was to determine the genetic diversity present among Tanzania grown sweetpotato germplasm to select promising breeding parents with enhanced yield and yield-related traits and dry matter content. Procedures: Seventy six sweetpotato accessions collected from Tanzania and 20 sweetpotato accessions received from International Potato Centre (CIP) in Lima/Peru were characterized in two seasons. The study was conducted using a 16 x 6 triple lattice design. The data collected included 16 morphological traits using CIPs standard descriptors. Data were analysed using multivariate procedure including cluster analysis and principle component analysis. Results and conclusions: The tested sweetpotato collections differed significantly for storage root yield, dry matter content (DMC) and number of roots per plot. Genotypes New Kawogo, Kiti cha Nyerere and Kisu cha Masai had the highest root yields whereas genotypes Ngw’anangusa, Rugomoka and Secondary had significantly higher mean DMC. Traits considered in the study revealed positive and significant correlations. The first four principal components accounted for 69.33% of the variations present in the tested sweetpotato genotypes. Cluster analysis grouped the studied genotypes into two major classes with genetic diversity of 0.54. The selected genotypes can be recommended for future breeding programs to bolster yield and dry matter content of sweetpotato under western Tanzania conditions.http://dx.doi.org/10.1080/09064710.2017.1372516dry matter contentgenetic diversitymorphological traitssweetpotatowestern tanzania |
| spellingShingle | Filson Mbezi Kagimbo Hussein Shimelis Julia Sibiya Diversity assessment of sweetpotato germplasm collections for yield and yield-related traits in western Tanzania Acta Agriculturae Scandinavica. Section B, Soil and Plant Science dry matter content genetic diversity morphological traits sweetpotato western tanzania |
| title | Diversity assessment of sweetpotato germplasm collections for yield and yield-related traits in western Tanzania |
| title_full | Diversity assessment of sweetpotato germplasm collections for yield and yield-related traits in western Tanzania |
| title_fullStr | Diversity assessment of sweetpotato germplasm collections for yield and yield-related traits in western Tanzania |
| title_full_unstemmed | Diversity assessment of sweetpotato germplasm collections for yield and yield-related traits in western Tanzania |
| title_short | Diversity assessment of sweetpotato germplasm collections for yield and yield-related traits in western Tanzania |
| title_sort | diversity assessment of sweetpotato germplasm collections for yield and yield related traits in western tanzania |
| topic | dry matter content genetic diversity morphological traits sweetpotato western tanzania |
| url | http://dx.doi.org/10.1080/09064710.2017.1372516 |
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