Using genetic structure data and phylogenetic criteria in attributing prioritization scores for conservation of spontaneous Capparis spinosa L. populations from Tunisia

Chibani, Farhat; Skouri-Gargouri, Houda; Salem, Asma Ben; Ghorbel, Abdelwahed; Zoghlami, Nèjia

doi:10.1016/j.jnc.2017.04.001

Cited by 1 publication

(4 citation statements)

References 45 publications

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“…In the current study, once the phylogenetic and genetic data were standardized separately, different and inconclusive conservation inferences were obtained. This outcome is in accordance with those documented in Delgado et al (2008) and Chibani et al (2017). The limitation of the phylogenetic data is indeed due to the heterogeneous difference levels among the terminal and basal populations (Crozier 1992).…”

Section: Genetic and Phylogenetic Data To Attribute Conservation Scoressupporting

confidence: 90%

“…Firstly, phylogenetic importance was deduced as described by Vane-Wright et al (1991), with some modifications in the study of Delgado et al (2008), by calculating PTI (taxic diversity index) using two parameters: population grouping (PG), as the number of nodes available in the phylogram and basic population weight (BPW), as the sum of PG divided by the PG value of each population. All basic population weights were standardized, as described previously by Delgado et al (2008) and Chibani et al (2017). The genetic data was used to separate the populations displaying the same phylogenetic scores by attributing 1 to the smallest population and the lowest inbreeding index to give them a larger emphasis.…”

Section: Discussionmentioning

confidence: 99%

“…The Vane-Wright et al method (1991) was applied with the aim of setting up suitable conservation strategies for pearl millet landrace populations from Tunisia based upon the priority scores calculated from phylogenetic and genetic criteria, as previously documented in Delgado et al (2008) and Chibani et al (2017).…”

Section: Conservation Prioritiesmentioning

confidence: 99%

“…Hence, as phylogenetic and genetic data were not conclusive to deduce conservation priorities when used separately, both data were integrated according to Vane-Wright et al (1991) and as previously documented in Delgado et al (2008) and Chibani et al (2017).…”

Section: Conservation Prioritiesmentioning

confidence: 99%

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Conservation priorities for endangered coastal North African Pennisetum glaucum L. landrace populations as inferred from phylogenetic considerations and population structure analysis

et al. 2018

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The increasing anthropologic pressure and the modernization of agriculture have led to a forsaking of pearl millet traditional cultivars, inducing a progressive loss of the genetic variability encompassed in this locally adapted germplasm. Imperatively, national efforts based on robust data gleaned from genetic surveys have to be undertaken in order to set up suitable conservation priorities. In this study, in addition to the assessment of the genetic diversity and population structure among and within a set of seven pearl millet landrace populations from coastal North Africa, demographic and phylogenetic data, conservation priority scores were calculated according to Vane-Wright et al. (1991). To date, genetic diversity of pearl millet in North Africa is still poorly documented. The present survey reports for the first time the use of highly informative nSSR markers (PIC = 0.74) on Pennisetum glaucum landraces representative of the Mediterranean coastline of North Africa. A high level of genetic diversity was obtained within the investigated landraces (H = 0.80) at the population level. F, AFC-3D, and Bayesian clustering underlined significant differentiation and an apparent genetic structure, according to geographical origin. Phylogenetic considerations integrated with demographic and genetic information enabled conclusive inferences of highly prioritized populations for conservation. Populations Haouaria, Hammem Laghzez, Mahdia, and Medenine, representatives of the main pearl millet growing areas in Tunisia and cultivated in the North African littoral, should be strongly recommended for an ex situ conservation program. Dynamic on-farm conservation method is also required as it allows the local landraces to evolve in different environments, while maintaining their adaptation potentials.

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Section: Genetic and Phylogenetic Data To Attribute Conservation Scoressupporting

confidence: 90%