Inter-relationships among traits and path analysis for yield components of cassava: a search for storage root yield indicators
| Autor: | A. G.O. Dixon, P. R. Rubaihayo, J. B.A. Whyte, D. S.O. Osiru |
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| Rok vydání: | 2001 |
| Předmět: | |
| Zdroj: | African Crop Science Journal; Vol 9, No 4 (2001); 599-606 |
| ISSN: | 2072-6589 1021-9730 |
| DOI: | 10.4314/acsj.v9i4.27582 |
| Popis: | Research aimed at selecting varieties of cassava (Manihot esculenta Crantz) with potential for high storage root yields through identification of stable yield components that can be used as selection criteria was carried out at three locations of different altitudes in Uganda. Multiple regression and simple phenotypic correlation coefficients revealed that storage root number and storage root weight were important components in storage root yield across locations. The path analysis identified leaf area, storage root number, storage root girth and storage root weight as the main yield components with root number (0.53) and storage root weight (0.45) having the highest values of direct path coefficient. Probably due to environmental influence, only 43% of the total variation of the storage root yield relationship was explained by the path coefficient analysis. RESUME Une recherche visant a selectionner des varietes potentielles a haut rendement en tubercules du manioc (Manihot esculenta Crantz) par identification des composantes stables de rendement qui peuvent etre utilisees comme criteres de selection a ete conduite dans trois localites de differentes altitudes en Uganda. La regression multiple et les simples coefficients de correlation phenotypique ont revele que le nombre de tubercules et le poids moyen des tubercules etaient des principales composantes du rendements des tubercules a travers tous les sites. L'analyse des chemins a indique quatre caracteres: la surface foliere, le nombre des tubercules, le diametre des tubercules et le poid moyen des tubercules comme composantes importantes avec le nombre des tubercules et le poids moyen des tubercules ayant 0.53 et 0.45 comme coefficient de chemin direct respectivement. Due probablement a une grande influence environnementale, seulement 43% de la variation totale du rendement des tubercules ont ete expliques par l'analyse des coefficients de chemin. (Af Crop Science and Production: 2001 9(4): 599-606) |
| Databáze: | OpenAIRE |
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