Accession-specific effects of repeated harvesting edible cowpea leaves on leaf yield, stability, and reliability
Cowpea (Vigna unguiculata L. Walpers) leaves are an important nutrient source. Little is known about accession-specific leaf yield dynamics across recurrent harvests. The objectives of this study were to assess environmental impact on successive single leaf yields, assess genotypic differences in le...
| Main Authors: | , , |
|---|---|
| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Informa UK Limited
2016
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/78290 |
| _version_ | 1855543068896264192 |
|---|---|
| author | Polreich, S. Becker, H.C. Maass, Brigitte L. |
| author_browse | Becker, H.C. Maass, Brigitte L. Polreich, S. |
| author_facet | Polreich, S. Becker, H.C. Maass, Brigitte L. |
| author_sort | Polreich, S. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Cowpea (Vigna unguiculata L. Walpers) leaves are an important nutrient source. Little is known about accession-specific leaf yield dynamics across recurrent harvests. The objectives of this study were to assess environmental impact on successive single leaf yields, assess genotypic differences in leaf yield dynamics, and determine suitability of statistical approaches for site specific selection to improve cowpea leaf yield. On-farm and on-station trials were conducted in two main cowpea-growing regions of Tanzania (Arusha and Kilimanjaro). Young, tender leaves were repeatedly picked from 11 accessions of the World Vegetable Center–Regional Center for Africa cowpea collection. To assess accession-specific leaf yield and leaf yield stability across seasons and locations stability variance (s2i), regression coefficient (bi), deviation mean square (d2i), and leaf yield reliability (RNi) were investigated. Significant genotypic effects for single leaf harvests were found only in Arusha on-station. Yield reliability, estimated as the likelihood to outperform a local check, was generally low. The RNi was correlated with stability parameters, but the coefficients varied more among locations than correlations of RNi with mean leaf yield per plant and harvest or those with test–check differences. The low probability of outperformance may indicate that selection for improved performance across subsequent leaf harvests will be very important, and possibly difficult, for prebreeding activities with the tested accessions. |
| format | Journal Article |
| id | CGSpace78290 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | Informa UK Limited |
| publisherStr | Informa UK Limited |
| record_format | dspace |
| spelling | CGSpace782902024-03-03T19:19:46Z Accession-specific effects of repeated harvesting edible cowpea leaves on leaf yield, stability, and reliability Polreich, S. Becker, H.C. Maass, Brigitte L. breeding cowpeas leaf vegetables Cowpea (Vigna unguiculata L. Walpers) leaves are an important nutrient source. Little is known about accession-specific leaf yield dynamics across recurrent harvests. The objectives of this study were to assess environmental impact on successive single leaf yields, assess genotypic differences in leaf yield dynamics, and determine suitability of statistical approaches for site specific selection to improve cowpea leaf yield. On-farm and on-station trials were conducted in two main cowpea-growing regions of Tanzania (Arusha and Kilimanjaro). Young, tender leaves were repeatedly picked from 11 accessions of the World Vegetable Center–Regional Center for Africa cowpea collection. To assess accession-specific leaf yield and leaf yield stability across seasons and locations stability variance (s2i), regression coefficient (bi), deviation mean square (d2i), and leaf yield reliability (RNi) were investigated. Significant genotypic effects for single leaf harvests were found only in Arusha on-station. Yield reliability, estimated as the likelihood to outperform a local check, was generally low. The RNi was correlated with stability parameters, but the coefficients varied more among locations than correlations of RNi with mean leaf yield per plant and harvest or those with test–check differences. The low probability of outperformance may indicate that selection for improved performance across subsequent leaf harvests will be very important, and possibly difficult, for prebreeding activities with the tested accessions. 2016-05-03 2016-12-13T12:27:47Z 2016-12-13T12:27:47Z Journal Article https://hdl.handle.net/10568/78290 en Limited Access Informa UK Limited Polreich, S.; Becker, H.C.; Maass, B.L. 2016. Accession-specific effects of repeated harvesting edible cowpea leaves on leaf yield, stability, and reliability. International Journal of Vegetable Science. (USA). ISSN 1931-5260. 22(3):295-315. |
| spellingShingle | breeding cowpeas leaf vegetables Polreich, S. Becker, H.C. Maass, Brigitte L. Accession-specific effects of repeated harvesting edible cowpea leaves on leaf yield, stability, and reliability |
| title | Accession-specific effects of repeated harvesting edible cowpea leaves on leaf yield, stability, and reliability |
| title_full | Accession-specific effects of repeated harvesting edible cowpea leaves on leaf yield, stability, and reliability |
| title_fullStr | Accession-specific effects of repeated harvesting edible cowpea leaves on leaf yield, stability, and reliability |
| title_full_unstemmed | Accession-specific effects of repeated harvesting edible cowpea leaves on leaf yield, stability, and reliability |
| title_short | Accession-specific effects of repeated harvesting edible cowpea leaves on leaf yield, stability, and reliability |
| title_sort | accession specific effects of repeated harvesting edible cowpea leaves on leaf yield stability and reliability |
| topic | breeding cowpeas leaf vegetables |
| url | https://hdl.handle.net/10568/78290 |
| work_keys_str_mv | AT polreichs accessionspecificeffectsofrepeatedharvestingediblecowpealeavesonleafyieldstabilityandreliability AT beckerhc accessionspecificeffectsofrepeatedharvestingediblecowpealeavesonleafyieldstabilityandreliability AT maassbrigittel accessionspecificeffectsofrepeatedharvestingediblecowpealeavesonleafyieldstabilityandreliability |