Variation in the response of eastern and southern Africa provenances of Faidherbia albida (Delile A. Chev) seedlings to water supply: A greenhouse experiment

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• 作者：Grace Koech^a ; ^c ; ^{gracekoech44@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Daniel Ofori^b ; Anne W.T. Muigai^c ; Jonathan Muriuki^a ; Parveen Anjarwalla^a ; Jan De leeuw^a ; Jeremias G. Mowo^a
• 关键词：Faidherbia albida ; Provenance x treatment interaction ; Age to age correlation ; Selection ; Genetic variation
• 刊名：Global Ecology and Conservation
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：8
• 期：Complete
• 页码：31-40
• 全文大小：743 K

文摘

Rural communities value Faidherbia albida in farming systems and pastoralism. Faidherbia albida provides 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 of Faidherbia albida   provenances 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 ×$\times$ interaction were significant at (p≤$p\le$0.001, p≤$\le$0.05) in seedling height, diameter and leaf numbers. Seedling height (r=0.94 p=0.001) recorded the highest correlation coefficient among all the growth variables analyzed. The growth variation was greater for seedling height than that of diameter and leaf numbers (h²${}^2$=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.