title: Variation in the response of eastern and southern Africa provenances ofFaidherbia albida(Delile A. Chev) seedlings to water supply: A greenhouse experiment.
abstract: Rural communities valueFaidherbia albidain farming systems and pastoralism.Faidherbia albidaprovides products such as medicine, fodder, fuel, wood, food and services such as shade, soil fertility and nutrient cycling. Excessive browsing by animals, branch lopping and pod harvesting, have critically reduced the natural regeneration in some areas which exposes it to challenges due to dependence upon natural regeneration. The objective of this research was to evaluate response ofFaidherbia albidaprovenances from eastern (Taveta Wangingombe) and southern Africa (Lupaso, Kuiseb Manapools) to different watering regimes to aid in selection of provenances for domestication. The observed difference in growth was analyzed to determine whether they are genetic or environmentally induced. Genotype  [Formula: see text]  interaction were significant at ([Formula: see text]0.001, p[Formula: see text]0.05) in seedling height, diameter and leaf numbers. Seedling height (r=0.94 p=0.001) recorded the highest correlation coefficient among all the growth variables analyzed. The growth variation was greater for seedling height than that of diameter and leaf numbers (h[Formula: see text]=0.97). Hierarchical cluster analysis grouped the provenances into three clusters with cluster iii consisting of Taveta, Kuiseb and Lupaso while cluster ii and i composed of Wangingombe and Manapools respectively. Manapools recorded the highest genetic distance from Taveta, Kuiseb and Lupaso at 84.55 units. Wangingombe and Manapools are closely related genetically at a distance of 7.32. The maximum inter-cluster distance between cluster i and iii indicated wider genetic diversity between the provenances in these clusters and selection should be from this clusters for hybridization program to achieve novel breeds.
authors.affiliation: World Agroforestry Centre, United Nations Avenue, Gigiri, P.O. Box 30677-00100, Nairobi, Kenya; Jomo Kenyatta University of Agriculture and Technology, P.O. BOX 62000-00100, Nairobi, Kenya.
authors.forename: Grace
authors.initials: G
authors.lastname: Koech
authors.affiliation: CSIR-Forestry Research Institute of Ghana, P. O. Box UP 63, KNUST, Kumasi, Ghana.
authors.forename: Daniel
authors.initials: D
authors.lastname: Ofori
authors.affiliation: Jomo Kenyatta University of Agriculture and Technology, P.O. BOX 62000-00100, Nairobi, Kenya.
authors.forename: Anne W T
authors.initials: AW
authors.lastname: Muigai
authors.affiliation: World Agroforestry Centre, United Nations Avenue, Gigiri, P.O. Box 30677-00100, Nairobi, Kenya.
authors.forename: Jonathan
authors.initials: J
authors.lastname: Muriuki
authors.affiliation: World Agroforestry Centre, United Nations Avenue, Gigiri, P.O. Box 30677-00100, Nairobi, Kenya.
authors.forename: Parveen
authors.initials: P
authors.lastname: Anjarwalla
authors.affiliation: World Agroforestry Centre, United Nations Avenue, Gigiri, P.O. Box 30677-00100, Nairobi, Kenya.
authors.forename: Jan
authors.initials: J
authors.lastname: De Leeuw
authors.affiliation: World Agroforestry Centre, United Nations Avenue, Gigiri, P.O. Box 30677-00100, Nairobi, Kenya.
authors.forename: Jeremias G
authors.initials: JG
authors.lastname: Mowo
keywords: Age to age correlation; Faidherbia albida; Genetic variation; Provenance x treatment interaction; Selection