Segregation of selected agronomic traits in six S1 cassava families
Inbreeding of predominantly cross-pollinating crops is expected to result in the generation of progeny with reduced fitness and/or progeny with improved phenotypes. However, this effect is not well documented in cassava (Manihot esculenta Crantz). In this study, S1 progeny from six cassava genotypes...
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| Format: | Journal Article |
| Language: | Inglés |
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2011
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| Online Access: | https://hdl.handle.net/10568/83173 |
| _version_ | 1855527702994354176 |
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| author | Kawuki, Robert S. Nuwamanya, E. Labuschagne, Maryke T. Herselman, L. Ferguson, Morag E. |
| author_browse | Ferguson, Morag E. Herselman, L. Kawuki, Robert S. Labuschagne, Maryke T. Nuwamanya, E. |
| author_facet | Kawuki, Robert S. Nuwamanya, E. Labuschagne, Maryke T. Herselman, L. Ferguson, Morag E. |
| author_sort | Kawuki, Robert S. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Inbreeding of predominantly cross-pollinating crops is expected to result in the generation of progeny with reduced fitness and/or progeny with improved phenotypes. However, this effect is not well documented in cassava (Manihot esculenta Crantz). In this study, S1 progeny from six cassava genotypes (I92/00067, TMS 30572, 95/SE-00036, NASE 4, MH95/0469 and Bamunanika) were examined for five traits: fresh root yield (FRY), fresh foliage yield (FFY), harvest index (HI), root dry matter content (DMC) and amylose content in order to study the effects of inbreeding on these traits. Considerable variations were observed among S1 progeny for FRY (0.0 - 4.3 kg plant-1); FFY (0.2 to 10.2 kg plant-1); HI (0.00 - 0.69); DMC (11.0 - 42%) and amylose content (11.8 to 34.2%). Moreover, in each trait, individual S1 clones existed that substantially outperformed the non-inbred parents. This was particularly true for amylose content where individual S1 clones in each family had higher amylose content than their respective non-inbred parent. Nevertheless, with introduction of inbreeding an average reduction of 61, 33.8, 24.6 and 13.2% was observed for FRY, HI, FFY and DMC. These results demonstrate that with introduction of inbreeding in cassava, it is possible to generate improved phenotypes, which should be the focus of breeders. |
| format | Journal Article |
| id | CGSpace83173 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2011 |
| publishDateRange | 2011 |
| publishDateSort | 2011 |
| record_format | dspace |
| spelling | CGSpace831732023-06-12T14:57:33Z Segregation of selected agronomic traits in six S1 cassava families Kawuki, Robert S. Nuwamanya, E. Labuschagne, Maryke T. Herselman, L. Ferguson, Morag E. amylopectin cassava inbreeding inbreeding depression manihot esculenta agronomy phenotypic genotypes Inbreeding of predominantly cross-pollinating crops is expected to result in the generation of progeny with reduced fitness and/or progeny with improved phenotypes. However, this effect is not well documented in cassava (Manihot esculenta Crantz). In this study, S1 progeny from six cassava genotypes (I92/00067, TMS 30572, 95/SE-00036, NASE 4, MH95/0469 and Bamunanika) were examined for five traits: fresh root yield (FRY), fresh foliage yield (FFY), harvest index (HI), root dry matter content (DMC) and amylose content in order to study the effects of inbreeding on these traits. Considerable variations were observed among S1 progeny for FRY (0.0 - 4.3 kg plant-1); FFY (0.2 to 10.2 kg plant-1); HI (0.00 - 0.69); DMC (11.0 - 42%) and amylose content (11.8 to 34.2%). Moreover, in each trait, individual S1 clones existed that substantially outperformed the non-inbred parents. This was particularly true for amylose content where individual S1 clones in each family had higher amylose content than their respective non-inbred parent. Nevertheless, with introduction of inbreeding an average reduction of 61, 33.8, 24.6 and 13.2% was observed for FRY, HI, FFY and DMC. These results demonstrate that with introduction of inbreeding in cassava, it is possible to generate improved phenotypes, which should be the focus of breeders. 2011-08 2017-08-21T13:08:59Z 2017-08-21T13:08:59Z Journal Article https://hdl.handle.net/10568/83173 en Limited Access Kawuki, R.S., Nuwamanya, E., Labuschagne, M.T., Herselman, L. & Ferguson, M.E. (2011). Segregation of selected agronomic traits in six S1 cassava families. Journal of Plant Breeding and Crop Science, 3(8), 154-160. |
| spellingShingle | amylopectin cassava inbreeding inbreeding depression manihot esculenta agronomy phenotypic genotypes Kawuki, Robert S. Nuwamanya, E. Labuschagne, Maryke T. Herselman, L. Ferguson, Morag E. Segregation of selected agronomic traits in six S1 cassava families |
| title | Segregation of selected agronomic traits in six S1 cassava families |
| title_full | Segregation of selected agronomic traits in six S1 cassava families |
| title_fullStr | Segregation of selected agronomic traits in six S1 cassava families |
| title_full_unstemmed | Segregation of selected agronomic traits in six S1 cassava families |
| title_short | Segregation of selected agronomic traits in six S1 cassava families |
| title_sort | segregation of selected agronomic traits in six s1 cassava families |
| topic | amylopectin cassava inbreeding inbreeding depression manihot esculenta agronomy phenotypic genotypes |
| url | https://hdl.handle.net/10568/83173 |
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