Paleo-climates and past introgression explain the spatio-temporal distribution of genetic structure in Triodanis perfoliata

Frontiers of Biogeography, Journal Year: 2024, Volume and Issue: 16(2)

Published: April 7, 2024

The dynamic nature of intrinsic (e.g., reproductive system, hybridization) and extrinsic factors physical barriers to gene flow) across space time generate complex biological processes that influence contemporary patterns genetic diversity, highlighting the need for interdisciplinary studies. Using widespread, mixed-mating annual Triodanis perfoliata, previous work demonstrated important roles breeding isolation by distance, resistance in shaping population diversity. Here we significantly build on this first step incorporating paleoclimatic data, historical admixture, estimating species divergence times 18 populations T. perfoliata spanning contiguous US. This current study provides novel insights into driving intraspecific diversification were not explained using only climate models. Specifically, these new analyses highlight early Holocene (11.7 - 8.326 ka) Marine Isotope Stage M2 (ca. 3.3 Ma), as periods explaining latter which appears be an period perfoliata. In addition, explored factors, via admixture explain connectivity. inclusion analysis provided clarity through evidence flow between would have experienced suitable habitat connectivity past climates. Our illustrates importance historic, well phylogeographic studies a comprehensive understanding patterns.

Language: Английский

Multiple Origin of Organellar Genomes of Cultivated Pea (Pisum Sativum L. Subsp. Sativum)

Published: Jan. 1, 2024

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Language: Английский

A hypervariable intron of the STAYGREEN locus provides excellent discrimination among Pisum fulvum accessions and reveals evidence for a relatively recent hybridization event with Pisum sativum

Frontiers in Plant Science, Journal Year: 2023, Volume and Issue: 14

Published: Aug. 25, 2023

An analysis of 82 non-synonymous Pisum fulvum accessions for sequence variation in a fragment the STAYGREEN ( SGR ) locus revealed 57 alleles, most which differed indel structure. Eight additional P. accessions, each supposedly synonymous with different accession initial group, were also analyzed. In every case paired possessed same but varied slightly 6-trait morphological phenotype, indicating that is much more reliable indicator identity than characterization. confirmed our previous finding separate into two allele groups. This division was not supported by results studies based on sequences distributed across entire genome, suggesting may have been produced selection at nearby and phylogeny be good overall relationships within species. One accession, PI 595941 (=JI1796), displayed an outside typical Instead, its resembled alleles limited to set sativum landraces from Middle East, hybridization between ancestors some primitive form domesticated . With one exception extreme northwest corner Israel, collected north latitude 35.5° N fixed group A. These northern greatly reduced diversity compared A other regions, populations represent recent extensions range Group B Lake Tiberias south generally sympatric southern accessions. Although occupied smaller area A, this (28 33 accessions) exceeded

Language: Английский