Genetic diversity across natural populations of three montane plant species from the Western Ghats, India revealed by intersimple sequence repeats

Deshpande, A.S.; Apte, G. S.; Bahulikar, Rahul A.; Lagu, M. D.; Kulkarni, B. G.; Suresh, H. S.; Singh, N. P.; Rao, M Umamaheswara; Gupta, Vidya S.; Pant, Aditi; Ranjekar, P. K.

doi:10.1046/j.0962-1083.2001.01379.x

Cited by 63 publications

(36 citation statements)

References 51 publications

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“…We observed the evidence of cutting-down of C. prunifera and other species in the study area. On the other hand, according to Deshpande et al (2001), the large number of loci with heterozygosity excess might be related to the fact that ISSR markers tend to generate more polymorphism than other markers, such as AFLP and RAPD. In this case, the simultaneous use of different molecular markers might shed light on this hypothesis.…”

Section: Discussionmentioning

confidence: 99%

Increased relatedness among the neighboring plants from seedling to adult stages in carnaúba wax palm

et al. 2016

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ABSTRACT. The objective of this study was to assess the spatial genetic structure (SGS) at different life stages (cohorts) in a remnant population (N = 101) of Copernicia prunifera in the semiarid region of northeastern Brazil. Using seven inter-simple sequence repeat molecular markers, we were able to analyze 93 loci with 100% polymorphism. Seedlings had the highest level of genetic diversity (H E = 0.411, H O = 0.599), followed by juveniles (H E = 0.394, H O = 0.579) and adults (H E = 0.267, H O = 0.427). Based on analysis of molecular variance, the majority of genetic variations were observed to occur within the life stages (93.42%) rather than between the life stages (6.58%). We found a recent reduction in the population size (bottleneck) based on the number of loci with heterozygosity excess for the two models used (infinite allele = 92 and stepwise = 91). All the life stages showed significant SGS, with positive and significant kinship values. Sp values were 0.040 for seedlings, 0.093 for juveniles, 0.156 for adults, and 0.053 for the total population. We found an increase in SGS from the seedling to adult stages, indicating that the plants were from related adult progenitors. Data from this study can be used in designing effective management and conservation strategies for the species.

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Section: Discussionmentioning

confidence: 99%

Increased relatedness among the neighboring plants from seedling to adult stages in carnaúba wax palm

et al. 2016

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“…We suggest that the relatively greater impact of the Palghat Gap may be owing to it being a wider (40 km wide compared with 10 km Shenkottah and 2-3 km wide Chaliyar valley) and deeper gap than the other two. Although no systematic studies have been conducted comparing species of differing ecologies and dispersal abilities, an impact of this Gap has also been found in small, restricted species like frogs [33] and some plants [34] and even in large-bodied, wide-ranging species like elephants [35]. However, certain older taxa like centipedes [36] and some long-lived trees [37] do not appear to be affected by this Gap.…”

Section: (A) Nested Patterns Of Divergences In Time and Spacementioning

confidence: 99%

Deep and wide valleys drive nested phylogeographic patterns across a montane bird community

et al. 2015

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Montane species distributions interrupted by valleys can lead to range fragmentation, differentiation and ultimately speciation. Paleoclimatic fluctuations may accentuate or reduce such diversification by temporally altering the extent of montane habitat and may affect species differentially. We examined how an entire montane bird community of the Western Ghats-a linear, coastal tropical mountain range-responds to topographic valleys that host different habitats. Using genetic data from 23 species (356 individuals) collected across nine locations, we examined if different species in the community reveal spatial concordance in population differentiation, and whether the timing of these divergences correlate with climatic events. Our results reveal a nested effect of valleys, with several species (10 of 23) demonstrating the oldest divergences associated with the widest and deepest valley in the mountain range, the Palghat Gap. Further, a subset of these 10 species revealed younger divergences across shallower, narrower valleys. We recovered discordant divergence times for all valley-affected montane birds, mostly in the Pleistocene, supporting the Pliestocene-pump hypotheses and highlighting the role of climatic fluctuations during this period in driving species evolution. A majority of species remain unaffected by valleys, perhaps owing to geneflow or extinction-recolonization dynamics. Studying almost the entire community allowed us to uncover a range of species' responses, including some generalizable and other unpredicted patterns.

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“…The natural or generated wildfires are the main threats for Resex areas, as evidenced by data from our mapping, because fire leads to the loss of individuals and alleles in the population. Deshpande et al (2001) assure that the explanation for the large number of loci presenting over heterozygosity lies on ISSR markers that tend to generate more polymorphism than other loci. Thus, according to Luikart et al (1998), recent genetic bottleneck processes, such as that in Resex populations may have been caused by constant wildfires that reduce the effective population.…”

Section: Genetic Analysis Of Issr Markersmentioning

confidence: 99%

Genetic and population diversity of bacuri (Platonia insignis Mart.) in Chapada Limpa extractive reserve, Maranho State, Brazil

Santos¹,

Neto²,

Nascimento³

et al. 2017

Afr. J. Biotechnol.

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Landscape studies illustrate how the structure and configuration of ecological/agroecological zones influence the genetic diversity of a species. Thus, the aim of the present study is to assess how landscape structure and conservation influence the genetic diversity indices of Platonia insignis Mart. (bacuri) in Chapada Limpa Extractive Reserve, Chapadinha County, Maranhão State, Brazil. The study was carried out in an extractive reserve, whose surroundings are mapped for land use and occupation, as well as for the collection of bacuri biological materials used in genetic analysis with ISSR markers. The study shows there is prevalence of good preservation state and secondary vegetation, as well as a well-preserved Cerrado area, lato sensu. Genetic differences were higher within populations (85.2%) than between populations (14.7%). According to the genetic diversity index, there was high genetic diversity and heterozygous allele richness. This may ensure population viability. Based on the present results, it is possible to say that the genetic differentiation of bacuri may have suffered direct consequences from the intensive wildfire events and/or from primary vegetation reduction.

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Genetic diversity across natural populations of three montane plant species from the Western Ghats, India revealed by intersimple sequence repeats

Cited by 63 publications

References 51 publications

Increased relatedness among the neighboring plants from seedling to adult stages in carnaúba wax palm

Increased relatedness among the neighboring plants from seedling to adult stages in carnaúba wax palm

Deep and wide valleys drive nested phylogeographic patterns across a montane bird community

Genetic and population diversity of bacuri (Platonia insignis Mart.) in Chapada Limpa extractive reserve, Maranho State, Brazil

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