Evidences of local adaptation in quantitative traits in Prosopis alba (Leguminosae)

Bessega, Cecilia; Pometti, Carolina Luciana; Ewens, Mauricio; Saidman, Beatriz Ofelia; Vilardi, Juan C.

doi:10.1007/s10709-014-9810-5

Cited by 16 publications

(15 citation statements)

References 51 publications

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“…The results of Mantel’s test were similar to the clustering results based on euclidean distance, revealing a nonsignificant geographical variation pattern of phenotypic and physiological parameters. This is consistent with the results of previous studies of not only black locust via molecular markers such SSRs [ 43 ] and ISSRs [ 64 ] and via allozymes [ 65 , 66 ] but also of other tree species, such as Prosopis alba [ 67 ]. Possible explanations for these results are that the collection range of provenances is broad while the numbers are small and/or black locust has migrated to its present-day range more recently.…”

Section: Discussionsupporting

confidence: 92%

Variation of phenotypic and physiological traits of Robinia pseudoacacia L. from 20 provenances

et al. 2022

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To select elite Robinia pseudoacacia L. germplasm resources for production, 13 phenotypes and three physiological indicators of 214 seedlings from 20 provenances were systematically evaluated and analyzed. The leaf phenotypic and physiological coefficients of variation among the genotypes ranged from 3.741% to 19.599% and from 8.260% to 42.363%, respectively. The Kentucky provenance had the largest coefficient of variation (18.541%). The average differentiation coefficients between and within provenances were 34.161% and 38.756%, respectively. These close percentages showed that R. pseudoacacia presented high genetic variation among and within provenances, which can be useful for assisted migration and breeding programs. Furthermore, based on the results of correlations, principal component analysis and cluster analysis, breeding improvements targeting R. pseudoacacia’s ornamental value, food value, and stress resistance of were performed. Forty and 30 excellent individuals, accounting for 18.692% and 14.019%, respectively, of the total resources. They were ultimately screened, after comprehensively taking into considering leaf phenotypic traits including compound leaf length, leaflet number and leaflet area and physiological characteristics including proline and soluble protein contents. These selected individuals could provide a base material for improved variety conservation and selection.

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Section: Discussionsupporting

confidence: 92%

Variation of phenotypic and physiological traits of Robinia pseudoacacia L. from 20 provenances

et al. 2022

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“…; Bessega et al . ), especially when distributed along an environmental gradient such as in our cases (Byars et al . ; Volynchik ; DeWoody et al .…”

Section: Discussionmentioning

confidence: 99%

Divergence is not enough: the use of ecological niche models for the validation of taxon boundaries

2017

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Delimiting taxon boundaries is crucial for any evolutionary research and conservation regulation. In order to avoid mistaken description of species, the approach of integrative taxonomy recommends considering multidisciplinary lines of evidence, including ecology. Unfortunately, ecological data are often difficult to quantify objectively. Here we test and discuss the potential use of ecological niche models for validating taxon boundaries, using three pairs of closely related plant taxa endemic to the south-western Alps as a case study. We also discuss the application of ecological niche models for species delimitation and the implementation of different approaches. Niche overlap, niche equivalency and niche similarity were assessed both in multidimensional environmental space and in geographic space to look for differences in the niche of three pairs of closely related plant taxa. We detected a high degree of niche differentiation between taxa although this result seems not due to differences in habitat selection. The different statistical tests gave contrasting outcomes between environmental and geographic spaces. According to our results, niche divergence does not seem to support taxon boundaries at species level, but may have had important consequences for local adaptation and in generating phenotypic diversity at intraspecific level. Environmental space analysis should be preferred to geographic space as it provides more clear results. Even if the different analyses widely disagree in their conclusions about taxon boundaries, our study suggests that ecological niche models may help taxonomists to reach a decision.

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“…The original stand included samples from eight unrelated provenances representing different areas and P. alba morphotypes. The Santiagueño type was represented by the populations of Rio Dulce Irrigation Zone (RDU), Sumampa (SUM), Pinto (PIN) and Añatuya (ANA), the Chaco Norte by Castelli (CAS) and Ibarreta (IBA) and the Chaco Sur type by Quimili (QUI) and Gato Colorado (GCO - Bessega et al 2015b). In 1999, 12 trees were selected from this trial, based on height, pod production per year and pod sweetness.…”

Section: Introductionmentioning

confidence: 99%

Pollen contamination and mating patterns in a Prosopis alba clonal orchard: impact on seed orchards establishment

D'amico¹,

Juan²,

Beatriz³

et al. 2019

iForest

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Prosopis alba (Leguminosae) is an important species from ecologic and economical points of view in arid and semi-arid regions of Argentina. In several open-pollinated species, pollen contamination from off-orchard parents and selfing have been proven to reduce orchard seed quality. In 2002, the first clonal orchard of Prosopis alba was established in Fernández (Santiago del Estero, Argentina) with 12 trees phenotypically selected from a progeny trial, based on height, pod production per year and pod sweetness. The aim of this study was to evaluate the mating patterns and pollen contamination rate in the orchard using ten SSR markers and paternity analysis. All the clones together with the progeny of a single clone (open-pollinated seeds) were genotyped. Data was processed by two different methods based on likelihood and Bayesian approaches, respectively. A high consistency (89%) of results was observed between the two methods, and pollen contamination rate was estimated between 27% and 37%. The minimum number of different pollen donors per mother plant varied from three to five and selfing occurrence was low (<1.6%). Based on the estimated status number (Ns = 4.4), the expected coancestry in the seed crop is equal to a Mendelian population with an effective size of 4-5 individuals. Genetic analyses are encouraged during the establishment and monitoring of trials in forest breeding and management programmes. It is strongly recommended to establish seed orchards in isolated areas and to guarantee equal representation of parental genotypes in the orchards.

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Evidences of local adaptation in quantitative traits in Prosopis alba (Leguminosae)

Cited by 16 publications

References 51 publications

Variation of phenotypic and physiological traits of Robinia pseudoacacia L. from 20 provenances

Variation of phenotypic and physiological traits of Robinia pseudoacacia L. from 20 provenances

Divergence is not enough: the use of ecological niche models for the validation of taxon boundaries

Pollen contamination and mating patterns in a Prosopis alba clonal orchard: impact on seed orchards establishment

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