Genetic Differentiation and Adaptability of Teak (Tectona grandis L.f.) Meta-Population in India

Vaishnav, Vivek; Ansari, Shamim Akhtar

doi:10.1007/s11105-018-1101-3

Cited by 10 publications

(14 citation statements)

References 69 publications

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“…Our findings emphasise the need for acquiring teak provenances from areas of its original distribution that are high in genetic diversity and are not in the present provenance trial, one such area being South-West India (Hansen et al, 2017) and the semi-moist east coast of India (Hansen et al, 2015). The analysis of Vaishnav and Ansari (2018) indicates that genetic resources in India may be a source for screening resilient superior provenances for improvement strategies for sustainable production of quality timber on a large scale. Various examples exist for the benefit of matching specific provenances to specific local conditions.…”

Section: Discussionmentioning

confidence: 77%

Teak genetic diversity in Ghana shows a narrow base for further breeding and a need for improved international collaboration for provenance exchange.

Wanders¹,

Ofori

Amoako³

et al. 2021

GenResJ

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We evaluated the genetic diversity of teak provenances at a newly established provenance trial with 52 provenances collected from Africa, South America and Asia in Tain II Forest Reserve in Central Ghana. This provenance collection / trial was established to widen the genetic basis for Teak establishment in West Africa. Using Genotyping by Sequencing (GBS) we analysed the genetic diversity of these provenances. Results of the study revealed that, although acquired from a wide geographical range, most Teak provenances in the trial belong to only two distinct groups that are closely related. The implication of this finding is that, for breeding, a wider range of provenances are needed from the original Teak distribution areas and more specifically from Southern India. We conclude that urgent protection of older existing sources of genetic variation in Teak as well as an improvement of international collaboration under the Nagoya protocol with countries with native teak populations is necessary.

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Section: Discussionmentioning

confidence: 77%

Teak genetic diversity in Ghana shows a narrow base for further breeding and a need for improved international collaboration for provenance exchange.

Wanders¹,

Ofori

Amoako³

et al. 2021

GenResJ

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“…It indicates that the approach avoiding null alleles have controlled the informativeness of the primers helping genetic differentiation (Lynch & Milligan 1994). The AF exhibited by the RAPD/ISSR markers are slightly higher to the information resulted in populations of Tectona grandis L. f. sampled from India on ISSR markers (0.73±0.02, Vaishnav & Ansari 2018). On the other hand, negligible differences in AF among the markers of RAPD and ISSR systems ensure the qualitative support for the diversity assessment (Lynch & Milligan 1994, Nybom & Bartish 2000).…”

Section: Discussionmentioning

confidence: 61%

“…Among the various molecular markers employed to assess diversity studies, PCR-based dominant markers such as RAPD (random amplified polymorphic DNA, Williams et al 1990) and ISSR (inter-simple sequence repeat, Zietkiewiez et al 1994) have become popular due to its polymorphism and discrimination power, as their application does not need any prior sequence information. These primer systems have been successfully applied for the genetic characterization of populations of tropical tree species (Ansari et al 2012, Abuduli et al 2016, Vaishnav & Ansari 2018). Bayesian statistics has been extended to dominant markers for precise estimates of population genetic hierarchies equivalent to those obtained with codominant markers, circumventing inbreeding estimate within the population (Holsinger et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Assessment of genetic structure of the endangered forest species Boswellia serrata Roxb. population in central india

Vaishnav

Mahesh

Kumar

2018

Preprint

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10Boswellia serrata Roxb., a commercially important species for its pulp and pharmaceutical 11 properties was sampled from three locations representing its natural distribution in central 12 India for genetic characterization through 56 RAPD + 42 ISSR loci. The wood fiber 13 dimensions measured for morphometric characterization confirmed 11.36% of the variation 14 in the length and 8.75% of the variation in the width indicating its fitness for local adaptation. 15 Bayesian and non-Bayesian approach based diversity measures resulted moderate within 16 population gene diversity (0.26±0.17), Shannon's information index (0.40±0.22) and 17 panmictic heterozygosity (0.28±0.01). A high estimate for genetic differentiation measures 18 i.e. G ST (0.31), G ST -B (0.33±0.02) and θ-II (0.45) led to the distinct clusters of the sampled 19genotypes representing their regional variability due to limited gene flow and total absence of 20 natural regeneration. We report the first investigation of the species for its molecular 21 characterization emphasizing the urgent need for the genetic improvement program for the 22 In-situ/Ex-situ conservation and sustainable commercialization. 23

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“…Hence the adaptive fitness of the species led by the population genetic characteristics was determined to ensure the sustainability and genomic resilience of the population through dominant AFLP markers. The dominant markers have already been applied to confirm the adaptive fitness of trees 28,29 and other plant species [30][31][32] . In the present study also, a high MAF (0.65 ± 0.02) of the AFLP markers and a high LD decay (1.99%) in loci-combinations supported their suitability for high-resolution GWAS 33 confirming their frequent coverage of the species genome.…”

Section: Discussionmentioning

confidence: 99%

Adaptive fitness of Sapindus emarginatus Vahl populations towards future climatic regimes and the limiting factors of its distribution

Pal

Vaishnav

Meena

et al. 2020

Sci Rep

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Sapindus emarginatus Vahl (Sapindaceae) also known as 'Indian Soap nut' is significantly important for saponin content in its fruits. However, its current population in India is heavily fragmented due to a lack of sustainable harvesting practices. Moreover, changing climatic regimes may further limit its distribution and possibly compromise the survival of the species in nature. The aim of the present study was to: predict the future distribution range of S. emarginatus; identify the bioclimatic variables limiting this distribution and to evaluate its adaptive fitness and genomic resilience towards these variables. To determine future species distribution range and identify limiting bioclimatic variables, we applied two different ecological niche models (ENMs; BioClim and MaxEnt) on real occurrence data (n = 88 locations). The adaptive fitness of the species was evaluated by quantifying the genetic variability with AFLP markers and marker-environmental associations, using AFLP-associated Bayesian statistics. We found 77% overlap between the baseline (2030) and predicted (2100) species distribution ranges, which were primarily determined by maximum temperature (T MAX) and mean annual precipitation (MAP). the t MAX and MAP contributed 43.1% and 27.1%, respectively to ENM model prediction. Furthermore, AFLP loci significantly associated with bioclimatic variables, and T MAX and MAP represent the lowest proportion (6.15%), confirming to the severe response of the species genome towards these variables. Nevertheless, the very low Linkage disequilibrium (LD) in these loci (4.54%) suggests that the current sensitivity to T MAX and MAP is subject to change during recombination. Moreover, a combination of high heterozygosity (0.40-0.43) and high within-population variability (91.63 ± 0.31%) confirmed high adaptive fitness to maintain reproductive success. Therefore, the current populations of S. emarginatus have substantial genomic resilience towards future climate change, albeit significant conservation efforts (including mass multiplication) are warranted to avoid future deleterious impacts of inbreeding depression on the fragmented populations. Sapindus emarginatus Vahl (Sapindaceae) also known as 'Indian 'Soap nut' is a tree species native to Indian sub-continent. In India, it is considered to be originated in the Western-Ghats and later extended up to the West-Central-North Indian biogeographical regions 1. The species is of substantial importance for global trade in soap and perfumery industries due to the oil and saponin content obtained from its leaves, fruits and seeds. The global trade of saponin from all plant sources is expected to grow up to 970 million US$ in 2023, from 950 million US$ in 2017 2. India exports approximately 63,368 kg/year of saponin extract obtained from all plant sources to different countries 3. The exact contribution of S. emarginatus to the global saponin market is unclear, but probably substantial as the species is widely used traditionally at Indian homes as detergent to wash precious ...

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Genetic Differentiation and Adaptability of Teak (Tectona grandis L.f.) Meta-Population in India

Cited by 10 publications

References 69 publications

Teak genetic diversity in Ghana shows a narrow base for further breeding and a need for improved international collaboration for provenance exchange.

Teak genetic diversity in Ghana shows a narrow base for further breeding and a need for improved international collaboration for provenance exchange.

Assessment of genetic structure of the endangered forest species Boswellia serrata Roxb. population in central india

Adaptive fitness of Sapindus emarginatus Vahl populations towards future climatic regimes and the limiting factors of its distribution

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