Performance and Stability of Improved Cassava (<i>Manihot esculenta</i> Crantz) Clones in Demand Creation Trials in Nigeria
Cassava fresh root yield and dry matter content constitute major determinants of demand by end-users. Increased demand for the seeds of improved varieties will facilitate the development of a sustainable seed system. However, for wide acceptability, there is a need to continuously evaluate candidate...
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MDPI AG
2023-08-01
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| Series: | Crops |
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| Online Access: | https://www.mdpi.com/2673-7655/3/3/20 |
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| author | ThankGod Oche Ogwuche Mercy Elohor Diebiru-Ojo Adetoro Najimu Chukwunalu Okolie Ossai Ukoabasi Ekanem Bidemi Adegbite Gideon Oyebode Peter Kulakow |
| author_facet | ThankGod Oche Ogwuche Mercy Elohor Diebiru-Ojo Adetoro Najimu Chukwunalu Okolie Ossai Ukoabasi Ekanem Bidemi Adegbite Gideon Oyebode Peter Kulakow |
| author_sort | ThankGod Oche Ogwuche |
| collection | DOAJ |
| description | Cassava fresh root yield and dry matter content constitute major determinants of demand by end-users. Increased demand for the seeds of improved varieties will facilitate the development of a sustainable seed system. However, for wide acceptability, there is a need to continuously evaluate candidate varieties for stability across different agroecological zones. Participatory Demand Creation Trials (DCTs) were established to evaluate cassava varieties with farmers and processors utilizing the best agronomic practices. The multi-year DCTs were conducted in 20 environments (7 locations) during the 2016–2017, 2017–2018, 2018–2019, and 2019/2020 cropping seasons with two replications. The plot sizes were 320 m<sup>2</sup> with a spacing of 1 m × 0.8 m. The traits evaluated were Plant Vigor (PV), root number, fresh yield, dry yield, Dry Matter Content (DMC), and bundle estimation. The traits were subjected to a GGE biplot in R software to identify high-yielding and stable genotypes. Results obtained from the 20 environments showed that genotype (G), environment (E), and GXE interaction effects were significant (<i>p</i> < 0.01) for all the traits but PV. The heritability ranged from 56% (PV) to 96% (DMC). The average fresh yield t/ha ranged from 25.5 (IBA30572) to 35.4 (IBA980505). The DMC ranged from CR36/5 (36.1%) to IBA010040 (30.7%). The dry yield ranged from 8.8% (IBA30572) to 11.4 (IBA980505). Estimated bundles ranged from 13.5 (CR36-5) to 15.7 (IBA950289). Three varieties, IBA961632, TMEB419, and CR36/5, were identified as the most promising high dry matter content varieties for cassava processors and farmers in Nigeria, and genotype IBA961632 was the most stable. The study revealed greater genotypic effects than from the environment and high genetic advances. |
| first_indexed | 2024-03-10T22:54:28Z |
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| institution | Directory Open Access Journal |
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| language | English |
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| publishDate | 2023-08-01 |
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| spelling | doaj.art-a0e21471a2d9473bb1cd92e80b5446f02023-11-19T10:08:30ZengMDPI AGCrops2673-76552023-08-013320921910.3390/crops3030020Performance and Stability of Improved Cassava (<i>Manihot esculenta</i> Crantz) Clones in Demand Creation Trials in NigeriaThankGod Oche Ogwuche0Mercy Elohor Diebiru-Ojo1Adetoro Najimu2Chukwunalu Okolie Ossai3Ukoabasi Ekanem4Bidemi Adegbite5Gideon Oyebode6Peter Kulakow7International Institute of Tropical Agriculture, Ibadan 200001, NigeriaInternational Institute of Tropical Agriculture, Ibadan 200001, NigeriaInternational Institute of Tropical Agriculture, Ibadan 200001, NigeriaInternational Institute of Tropical Agriculture, Ibadan 200001, NigeriaInternational Institute of Tropical Agriculture, Ibadan 200001, NigeriaInternational Institute of Tropical Agriculture, Ibadan 200001, NigeriaDepartment of Crop, Soil and Environmental Sciences, Faculty of Agriculture, Auburn University, Auburn, AL 36849, USAInternational Institute of Tropical Agriculture, Ibadan 200001, NigeriaCassava fresh root yield and dry matter content constitute major determinants of demand by end-users. Increased demand for the seeds of improved varieties will facilitate the development of a sustainable seed system. However, for wide acceptability, there is a need to continuously evaluate candidate varieties for stability across different agroecological zones. Participatory Demand Creation Trials (DCTs) were established to evaluate cassava varieties with farmers and processors utilizing the best agronomic practices. The multi-year DCTs were conducted in 20 environments (7 locations) during the 2016–2017, 2017–2018, 2018–2019, and 2019/2020 cropping seasons with two replications. The plot sizes were 320 m<sup>2</sup> with a spacing of 1 m × 0.8 m. The traits evaluated were Plant Vigor (PV), root number, fresh yield, dry yield, Dry Matter Content (DMC), and bundle estimation. The traits were subjected to a GGE biplot in R software to identify high-yielding and stable genotypes. Results obtained from the 20 environments showed that genotype (G), environment (E), and GXE interaction effects were significant (<i>p</i> < 0.01) for all the traits but PV. The heritability ranged from 56% (PV) to 96% (DMC). The average fresh yield t/ha ranged from 25.5 (IBA30572) to 35.4 (IBA980505). The DMC ranged from CR36/5 (36.1%) to IBA010040 (30.7%). The dry yield ranged from 8.8% (IBA30572) to 11.4 (IBA980505). Estimated bundles ranged from 13.5 (CR36-5) to 15.7 (IBA950289). Three varieties, IBA961632, TMEB419, and CR36/5, were identified as the most promising high dry matter content varieties for cassava processors and farmers in Nigeria, and genotype IBA961632 was the most stable. The study revealed greater genotypic effects than from the environment and high genetic advances.https://www.mdpi.com/2673-7655/3/3/20sustainable seed systemdemand creationGGE biplot and stability |
| spellingShingle | ThankGod Oche Ogwuche Mercy Elohor Diebiru-Ojo Adetoro Najimu Chukwunalu Okolie Ossai Ukoabasi Ekanem Bidemi Adegbite Gideon Oyebode Peter Kulakow Performance and Stability of Improved Cassava (<i>Manihot esculenta</i> Crantz) Clones in Demand Creation Trials in Nigeria Crops sustainable seed system demand creation GGE biplot and stability |
| title | Performance and Stability of Improved Cassava (<i>Manihot esculenta</i> Crantz) Clones in Demand Creation Trials in Nigeria |
| title_full | Performance and Stability of Improved Cassava (<i>Manihot esculenta</i> Crantz) Clones in Demand Creation Trials in Nigeria |
| title_fullStr | Performance and Stability of Improved Cassava (<i>Manihot esculenta</i> Crantz) Clones in Demand Creation Trials in Nigeria |
| title_full_unstemmed | Performance and Stability of Improved Cassava (<i>Manihot esculenta</i> Crantz) Clones in Demand Creation Trials in Nigeria |
| title_short | Performance and Stability of Improved Cassava (<i>Manihot esculenta</i> Crantz) Clones in Demand Creation Trials in Nigeria |
| title_sort | performance and stability of improved cassava i manihot esculenta i crantz clones in demand creation trials in nigeria |
| topic | sustainable seed system demand creation GGE biplot and stability |
| url | https://www.mdpi.com/2673-7655/3/3/20 |
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