Segregation for seed weight, pod length and days to flowering following a cowpea cross
Field studies were conducted to evaluate the segregation of the F3 (early generation) and F6 (late generation) families for seed weight, pod length and days to flowering among cowpea inter-sub-specific crosses. A wide range of segregants were provided in this cross and families were highly significa...
| Autores principales: | , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés Francés |
| Publicado: |
African Journals Online
2001
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/92662 |
| _version_ | 1855523065283215360 |
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| author | Ubi, E. Mignouna, H. Obigbesan, G. |
| author_browse | Mignouna, H. Obigbesan, G. Ubi, E. |
| author_facet | Ubi, E. Mignouna, H. Obigbesan, G. |
| author_sort | Ubi, E. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Field studies were conducted to evaluate the segregation of the F3 (early generation) and F6 (late generation) families for seed weight, pod length and days to flowering among cowpea inter-sub-specific crosses. A wide range of segregants were provided in this cross and families were highly significantly different in the three agronomic traits studied. The continuous distributions observed for these traits studied in both generations confirms the quantitative nature of inheritance for these traits. Broad sense heritability estimates ranged from 47.8 to 91.1%. Estimates of genetic advance ranged from high to low and were consistent in both generations for all the traits. The F3 and F6 generations were not significantly different in all the three agronomic traits. Intergeneration correlations ranging from 0.35 to 0.49 also revealed strong associations between traits measured in the two generations. A no significant drop was observed between F3 mean and the corresponding F6 mean. This suggests the existence of a good measure of additive and possibly of additive x additive components of variance (which alone are fixable through subsequent inbreeding) although some amount of dominance and duplicate epistasis (which are non-fixable) may also be operative. The results of this study indicate that selection in early generations for superior types is feasible. |
| format | Journal Article |
| id | CGSpace92662 |
| institution | CGIAR Consortium |
| language | Inglés Francés |
| publishDate | 2001 |
| publishDateRange | 2001 |
| publishDateSort | 2001 |
| publisher | African Journals Online |
| publisherStr | African Journals Online |
| record_format | dspace |
| spelling | CGSpace926622024-05-15T05:11:33Z Segregation for seed weight, pod length and days to flowering following a cowpea cross Ubi, E. Mignouna, H. Obigbesan, G. agronomic traits early generation late generation vigna unguiculata caractéristiques agronomiques jeune génération génération avancée Field studies were conducted to evaluate the segregation of the F3 (early generation) and F6 (late generation) families for seed weight, pod length and days to flowering among cowpea inter-sub-specific crosses. A wide range of segregants were provided in this cross and families were highly significantly different in the three agronomic traits studied. The continuous distributions observed for these traits studied in both generations confirms the quantitative nature of inheritance for these traits. Broad sense heritability estimates ranged from 47.8 to 91.1%. Estimates of genetic advance ranged from high to low and were consistent in both generations for all the traits. The F3 and F6 generations were not significantly different in all the three agronomic traits. Intergeneration correlations ranging from 0.35 to 0.49 also revealed strong associations between traits measured in the two generations. A no significant drop was observed between F3 mean and the corresponding F6 mean. This suggests the existence of a good measure of additive and possibly of additive x additive components of variance (which alone are fixable through subsequent inbreeding) although some amount of dominance and duplicate epistasis (which are non-fixable) may also be operative. The results of this study indicate that selection in early generations for superior types is feasible. Des études en champs ont été conduites pour évaluer la ségrégation des familles en F3 (jeune génération) et F6 (génération avancée) quant au poids des graines, la longueur de la gousse et le nombre de jours à la floraison chez des sous-espèces de niébé croisées. Une large gamme de lignées ségrégantes était introduite dans ces croisements et les familles utilisées étaient sensiblement différentes pour les trois caractères agronomiques étudiés. Les distributions continues observées pour ces caractères étudiés au sein des deux générations confirment la nature quantitative du patrimoine héréditaire pour ces caractères. Les estimations générales d'héritabilité se rangeaient entre 47,8 et 91,1%. Les estimations de transferts génétiques allaient des plus basses aux plus élevées et elles étaient constantes au sein des deux générations pour tous les caractères étudiés. Les corrélations entre générations s'est rangées entre 0.35 et 0.49 et montrées aussi les fortes associations entre les caractères mesurés pour les deux générations. Un déclin non significatif était observé entre la moyenne de F3 et son correspondant de F6. Ceci suggère l'existence d'une bonne mesure additive et peut-être de l' additive x additive composante de la variance (fixable pendant le croisement ultérieur) même si certains traits de dominance et de double épistasies (non fixables) pourraient être opérationnels. Les résultats de cette étude montre qu'une sélection parmi les jeunes générations de races supérieures est faisable. 2001 2018-05-17T09:03:01Z 2018-05-17T09:03:01Z Journal Article https://hdl.handle.net/10568/92662 en fr Limited Access African Journals Online Ubi, E., Mignouna, H. & Obigbesan, G. (2001). Segregation for seed weight, pod length and days to flowering following cowpea cross. African Crop Science Journal, 9(3), 463-470. |
| spellingShingle | agronomic traits early generation late generation vigna unguiculata caractéristiques agronomiques jeune génération génération avancée Ubi, E. Mignouna, H. Obigbesan, G. Segregation for seed weight, pod length and days to flowering following a cowpea cross |
| title | Segregation for seed weight, pod length and days to flowering following a cowpea cross |
| title_full | Segregation for seed weight, pod length and days to flowering following a cowpea cross |
| title_fullStr | Segregation for seed weight, pod length and days to flowering following a cowpea cross |
| title_full_unstemmed | Segregation for seed weight, pod length and days to flowering following a cowpea cross |
| title_short | Segregation for seed weight, pod length and days to flowering following a cowpea cross |
| title_sort | segregation for seed weight pod length and days to flowering following a cowpea cross |
| topic | agronomic traits early generation late generation vigna unguiculata caractéristiques agronomiques jeune génération génération avancée |
| url | https://hdl.handle.net/10568/92662 |
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