Heterosis and heritability of traits contributing to select high yielding drought stress tolerance sweetpotato breeding lines
Exploiting heterosis in sweetpotatoes is key to developing high-performance hybrids. The objective of this study was to estimate the heterosis and heritability of traits that contribute to drought stress tolerance and storage root yield in sweetpotatoes. Experiments were conducted at six locations i...
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Taylor & Francis Group
2025-12-01
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| Series: | Cogent Food & Agriculture |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/23311932.2024.2447899 |
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| author | Mahaman Mourtala Issa Zakari Emeka Benjamin Utobo Zangui Souley Moussa Josefina Ndamononghenda Abed Ifeanyi Maxwell Nwankwo Innocent Happiness Ogba Oselebe |
| author_facet | Mahaman Mourtala Issa Zakari Emeka Benjamin Utobo Zangui Souley Moussa Josefina Ndamononghenda Abed Ifeanyi Maxwell Nwankwo Innocent Happiness Ogba Oselebe |
| author_sort | Mahaman Mourtala Issa Zakari |
| collection | DOAJ |
| description | Exploiting heterosis in sweetpotatoes is key to developing high-performance hybrids. The objective of this study was to estimate the heterosis and heritability of traits that contribute to drought stress tolerance and storage root yield in sweetpotatoes. Experiments were conducted at six locations in Niger (Kollo, Kalapate, Bengou, and Bangui) and Nigeria (Abakaliki and Umudike). Data were collected on storage root yield and its components as well as drought parameters. Statistical analysis was performed using SAS software. The combined ANOVA results revealed a highly significant difference (p < 0.001) between genotypes and genotype × location interactions for all traits across the six locations under both water regimes. Five hybrids (5 × 12-1 with 108.06%, 6 × 8-5 with 98.31%, 7 × 6-1 with 131.00%, 8 × 6-1 with 91.14%, and 12 × 5-1 with 115.33%) under drought and three (6 × 13-1 with 52.90%, 7 × 6-1 with 200.20%, and 8 × 6-1 with 83.25%) under normal conditions showed positive significance (p < 0.05) or high positive significance (p < 0.01) BPH for storage root yield (SRY). Other hybrids showed heterobeltiosis in chlorophyll content, canopy temperature, and dry matter content under both conditions. Highly significant (p < 0.01) and strong positive genotypic and phenotypic associations were obtained between chlorophyll content and upper biomass yield (0.87) and between storage root diameter and storage root yield (0.81). The study recommended that (1) hybrids 5 × 12-1, 6 × 8-5, 7 × 6-1, 8 × 6-1, and 12 × 5-1 are good for SRY under drought conditions; (2) hybrids 6 × 8-5 and 11 × 7-1 are recommended for vines production under rainfall to feed animals; and (3) hybrids 3 × 12-3 and 12 × 5-1 with high dry matter content are recommended for industrial used. |
| format | Article |
| id | doaj-art-d3038b37735a43ef9c1a1a5bade1cbbf |
| institution | Kabale University |
| issn | 2331-1932 |
| language | English |
| publishDate | 2025-12-01 |
| publisher | Taylor & Francis Group |
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| series | Cogent Food & Agriculture |
| spelling | doaj-art-d3038b37735a43ef9c1a1a5bade1cbbf2025-01-06T08:32:31ZengTaylor & Francis GroupCogent Food & Agriculture2331-19322025-12-0111110.1080/23311932.2024.2447899Heterosis and heritability of traits contributing to select high yielding drought stress tolerance sweetpotato breeding linesMahaman Mourtala Issa Zakari0Emeka Benjamin Utobo1Zangui Souley Moussa2Josefina Ndamononghenda Abed3Ifeanyi Maxwell Nwankwo Innocent4Happiness Ogba Oselebe5Department of Natural Resources Management, National Institute of Agronomic Research of Niger, NigerDepartment of Crop Production and Landscape Management, Ebonyi State University, Abakaliki, NigeriaRegional Agriculture Directory of Agadez, Ministry of Agriculture and livestock of Niger, NigerDepartment of Crop Production and Agriculture Technology, University of NamibiaSweetpotato Research Programme, National Root Crops Research Institute, Umudike, NigeriaDepartment of Crop Production and Landscape Management, Ebonyi State University, Abakaliki, NigeriaExploiting heterosis in sweetpotatoes is key to developing high-performance hybrids. The objective of this study was to estimate the heterosis and heritability of traits that contribute to drought stress tolerance and storage root yield in sweetpotatoes. Experiments were conducted at six locations in Niger (Kollo, Kalapate, Bengou, and Bangui) and Nigeria (Abakaliki and Umudike). Data were collected on storage root yield and its components as well as drought parameters. Statistical analysis was performed using SAS software. The combined ANOVA results revealed a highly significant difference (p < 0.001) between genotypes and genotype × location interactions for all traits across the six locations under both water regimes. Five hybrids (5 × 12-1 with 108.06%, 6 × 8-5 with 98.31%, 7 × 6-1 with 131.00%, 8 × 6-1 with 91.14%, and 12 × 5-1 with 115.33%) under drought and three (6 × 13-1 with 52.90%, 7 × 6-1 with 200.20%, and 8 × 6-1 with 83.25%) under normal conditions showed positive significance (p < 0.05) or high positive significance (p < 0.01) BPH for storage root yield (SRY). Other hybrids showed heterobeltiosis in chlorophyll content, canopy temperature, and dry matter content under both conditions. Highly significant (p < 0.01) and strong positive genotypic and phenotypic associations were obtained between chlorophyll content and upper biomass yield (0.87) and between storage root diameter and storage root yield (0.81). The study recommended that (1) hybrids 5 × 12-1, 6 × 8-5, 7 × 6-1, 8 × 6-1, and 12 × 5-1 are good for SRY under drought conditions; (2) hybrids 6 × 8-5 and 11 × 7-1 are recommended for vines production under rainfall to feed animals; and (3) hybrids 3 × 12-3 and 12 × 5-1 with high dry matter content are recommended for industrial used.https://www.tandfonline.com/doi/10.1080/23311932.2024.2447899Heterosishybriddrought tolerantsweetpotatoWest AfricaAgriculture & Environmental SciencesFood Additives & Ingredients |
| spellingShingle | Mahaman Mourtala Issa Zakari Emeka Benjamin Utobo Zangui Souley Moussa Josefina Ndamononghenda Abed Ifeanyi Maxwell Nwankwo Innocent Happiness Ogba Oselebe Heterosis and heritability of traits contributing to select high yielding drought stress tolerance sweetpotato breeding lines Cogent Food & Agriculture Heterosishybrid drought tolerant sweetpotato West Africa Agriculture & Environmental Sciences Food Additives & Ingredients |
| title | Heterosis and heritability of traits contributing to select high yielding drought stress tolerance sweetpotato breeding lines |
| title_full | Heterosis and heritability of traits contributing to select high yielding drought stress tolerance sweetpotato breeding lines |
| title_fullStr | Heterosis and heritability of traits contributing to select high yielding drought stress tolerance sweetpotato breeding lines |
| title_full_unstemmed | Heterosis and heritability of traits contributing to select high yielding drought stress tolerance sweetpotato breeding lines |
| title_short | Heterosis and heritability of traits contributing to select high yielding drought stress tolerance sweetpotato breeding lines |
| title_sort | heterosis and heritability of traits contributing to select high yielding drought stress tolerance sweetpotato breeding lines |
| topic | Heterosishybrid drought tolerant sweetpotato West Africa Agriculture & Environmental Sciences Food Additives & Ingredients |
| url | https://www.tandfonline.com/doi/10.1080/23311932.2024.2447899 |
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