Abstract Biogeographical regionalization is the classification of regions in terms their biota and key to our understanding ecological historical drivers affecting species distribution macroecological or large‐scale conservation studies. However, despite mass production distributions phylogenetic data, statistical computational infrastructure successfully incorporate, manipulate analyse such massive amounts data had not been fully developed. Here, we present phyloregion , a package for...

Dose-response relationships reflect the effects of a substance on organisms, and are widely used in broad research areas, from medicine physiology, to vector control pest management agronomy. Furthermore, reporting response organisms stressors is an essential component many public policies (e.g. health, environment), assessment xenobiotic responses integral part World Health Organization recommendations. Building upon R script that we previously made available, considering its popularity,...

Current global climate change is expected to affect biodiversity negatively at all scales leading mass loss. Many studies have shown that the distribution of allele frequencies across a species' range often influenced by specific genetic loci associated with local environmental variables. This association reflects adaptation and changes those could thereby contribute evolutionary response change. However, predicting how species will adapt from this type data alone remains challenging. In...

Niche divergence between polyploids and their lower ploidy progenitors is one of the primary mechanisms fostering polyploid establishment adaptive divergence. However, within-species chromosomal reproductive variability have usually been neglected in community ecology biodiversity analyses even though they recognized to play a role diversification lineages. We used Paspalum intermedium, grass species with diverging genetic systems (diploidy vs. autopolyploidy, allogamy autogamy sexuality...

Most tree species underwent cycles of contraction and expansion during the Quaternary. These led to an ancient complex genetic structure that has since been affected by extensive gene flow strong local adaptation. The extent which hybridization played a role in this multi-layered is important be investigated. To study effect on joint population two dominant Eurasian boreal forest, Picea abies P. obovata, we used targeted resequencing obtained around 480 K nuclear SNPs 87 chloroplast 542...

Abstract In systems alternating between sexual and asexual reproduction, sex increases under unfavorable environmental conditions. plants producing (apomictic) seeds, studies on the influence of factors are equivocal. We used Paspalum intermedium to study effects expression apomictic developments, resulting reproductive fitness variables. Flow cytometric embryological analyses were performed characterize ploidy modes, local climatic conditions ovule seed frequencies determined. Seed set...

Recent studies have highlighted the significant role of copy number variants (CNVs) in phenotypic diversity, environmental adaptation and species divergence across eukaryotes. The presence CNVs also has potential to introduce genotyping biases, which can pose challenges accurate population quantitative genetic analyses. However, detecting genomes, particularly non-model organisms, presents a formidable challenge. To address this issue, we developed statistical framework an accompanying r...

Most apomictic plants are facultative, maintaining the ability to reproduce sexually at different frequencies depending on taxa, ploidy, and reproductive stage. In this context, Paspalum species good model systems for studies evaluating varying levels of apomixis expression. We aimed identify, in tetraploid species, degree residual sexuality three stages development, if their expression varies along them order predict realized impact genetic diversity future generations. Three main...

Abstract Current global climate change is expected to affect biodiversity negatively at all scales leading mass loss. Many studies have shown that the distribution of allele frequencies across a species’ range often influenced by specific genetic loci associated with local environmental variables. This association reflects adaptation and changes those could thereby contribute evolutionary response change. However, predicting how species will adapt from this type data alone remains...

Polyploidy plays a major role in plant evolution. The establishment of new polyploids is often consequence single or few successful polyploidization events occurring within species' evolutionary trajectory. New polyploid lineages can play different roles diversification and go through several stages influenced by biotic abiotic constraints characterized extensive genetic changes. study such changes has been crucial for understanding Here, we use the multiploid-species Paspalum intermedium to...

Summary Biogeographical regionalization is the classification of regions in terms their biotas and key to understanding biodiversity patterns across world. Previously, it was only possible perform analysis biogeographic on small datasets, often using tools that are difficult replicate. Here, we present phyloregion , a package for spatial conservation R computing environment, tailored mega phylogenies macroecological datasets ever-increasing size complexity. Compared available packages, three...

Abstract Over the last decades, extensive genome-wide resequencing studies have highlighted extent of hybridization and introgression between closely related species. Animal plant species went through cycles contractions expansions as a result glacial cycles. These repeated sequences reproductive isolation admixture at continental scales led to accumulation over time an ancient, deep-seated complex genetic structure. This structure was blurred by gene flow, or reinforced strong local...

With ever-rising demand for food, forage breeding intensification of cattle production is also taking a leap. In South America, systems are displaced to marginal areas poorly exploited with cultivated pastures yet high potential growing stocking rates. This places the need using native genetic resources breed locally adapted plant genotypes that benefits from better quality, yield, and lesser threat local biodiversity. Paspalum modestum Mez grass species produces quality grows in like...

The ongoing global climate change poses a significant threat to biodiversity across various levels, potentially resulting in substantial loss. Numerous studies have demonstrated the impact of specific genetic loci on allele distribution within species' range, correlating with local environmental factors and reflecting instances adaptation. However, leveraging this data alone predict adaptation remains complex challenge. In study, we utilized exome capture sequences alongside niche...

Navigating the challenges in apomixis population genetics requires a comprehensive understanding of its unique genetic consequences. This review explores apomixis, comparing sexual and apomictic populations, research challenges, outlining future directions. Apomictic plants form clonal seeds, arise from species through hybridization and/or polyploidy. Sexual generate variation via meiotic recombination, random mating, gradual accumulation beneficial mutations. In contrast, apomicts rely on...

During a study to re-assess the genus Amomum Roxb. in Sri Lanka, we encountered new variety of from Seven Virgin Hills Peak Wilderness Sanctuary, Lanka. This specimen shows similar morphological characters villosum var. and xanthioides but it exhibits significant differences some important such as lamina shape, ligule hairs, bract bracteole non-tubular bracteoles labellum color patterns which warrant recognition under A. villosum. All features this taxon (Amomum zeylanicus) including...

During a recent revision of the genus ＂Alpinia＂ Roxb. family Zingiberaceae in Sri Lanka, we came to notice set ambiguous morphological descriptions on ＂Alpinia fax＂ Burtt and Smith. This is particularly pertaining few earlier collections especially description species discovered from India recently. In this short note, address ambiguity these characteristics which do not add up with accepted species, also giving reference currently description, our field Indian species.

The Journal of the National Science Foundation Sri Lanka publishes results research in all aspects and Technology. journal also has a website at http://www.nsf.gov.lk/. 2021 Impact Factor: 0.682The JNSF provides immediate open access to its content on principle that making freely available public supports greater global exchange knowledge.

Abstract Studies show that copy number variants (CNVs), due to their ubiquitous presence in eukaryotes, contribute phenotypic variation, environmental adaptation, and fuel species divergence at a previously unknown rate. However, the detection of CNVs genomes, especially non-model organisms is challenging need for costly genomic resources complex computational infrastructure. Therefore, provide researchers with low-cost easily accessible resource, we developed robust statistical framework an...

Alpinia and Amomum are the largest two genera that list highest number of endemics offamily Zingiberaceae in Sri Lanka. The family is recognized as a least studied plant group inthe country, justifying need for thorough study. Hence, it timely istaken into consideration molecular systematic studies given new techniques areavailable. As pioneering step, this study, we addressed several taxonomic issues,phylogenetic relationships conservational status Amomum. In order tocollect more...

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