Floristic novelties of Veronica subgenus Pseudolysimachium (W. D. J. Koch) Buchenau of the Altai Mountain Country and adjacent territories

Kosachev, P. A.; Albach, Dirk C.

doi:10.14258/turczaninowia.25.3.14

Cited by 1 publication

(3 citation statements)

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“…pinnata × V . porphyriana ), which supported previous hypotheses based on morphology (Kosachev, 2003; Kosachev & al., 2013). The results recovered some individuals with inconclusive support and suggesting a range of F1 to later‐generation hybrids.…”

Section: Discussionsupporting

confidence: 90%

“…Our results inferred F1 hybrids as the most dominant group of hybrids. Based on the first-level analysis in STRUCTURE, we retrieved different combinations of admixed individuals involving different species (V. spicata × V. pinnata; V. longifolia × V. incana; V. longifolia × V. porphyriana; V. pinnata × V. porphyriana), which supported previous hypotheses based on morphology (Kosachev, 2003;Kosachev & al., 2013). The results recovered some individuals with inconclusive support and suggesting a range of F1 to later-generation hybrids.…”

Section: ■ Discussionsupporting

confidence: 82%

“…Hosting 10 different species of V. subg. Pseudolysimachium and numerous hybrids of intermediate morphology, the Altai Mountains are the most species-rich region for the subgenus (Kosachev, 2003(Kosachev, , 2017Kosachev & German, 2004;Kosachev & Ebel, 2010;Kosachev & al., 2013). Hypotheses of frequent hybridization in V. subg.…”

Section: ■ Introductionmentioning

confidence: 99%

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Altai Mountains – cradle of hybrids and introgressants: A case study in Veronica subg. Pseudolysimachium (Plantaginaceae)

Khan,

Mayland‐Quellhorst,

Kosachev

et al. 2024

TAXON

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Mountains form a diverse mosaic of microhabitats over small distances created by changes in climate, soil, and water availability. A key to adaptation of plants to such microhabitats is genetic variation; however, natural accumulation of genetic variation through mutation is slow and often not sufficient alone. Adaptive introgression via hybridization is an alternative to generate genetic variation. Here, we investigate hybridization and discuss its adaptive role in Veronica subg. Pseudolysimachium at their Altai Mountains distribution. To support our hypotheses of frequent hybridization, we genotyped thousands of SNPs for 233 individuals from 10 species and 7 putative hybrids previously described based on morphology. We employed Bayesian and likelihood statistical models and supported our results by morphometric analysis and genomic in situ hybridization (GISH). The results suggest that almost all the individuals of the putative hybrids are of F1 type. The GISH investigation in one case strongly supports homoploid hybridization (origin of V. ×schmakovii from V. longifolia and V. porphyriana. Divergence times of Altai Veronica species are estimated to be within 1–2 million years ago with high probability of gene flow over that time. Our results also demonstrate that the direction of gene flow is mainly from the locally endemic V. porphyriana. We hypothesize that the large Siberian plains and topographically diverse foreland of the Altai Mountains provide an ideal setting for hybridization with the potential for adaptive introgression of alleles conferring tolerance to cooler climates, to the lowland species migrating into the Altai Mountains.

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Section: Discussionsupporting

confidence: 90%

Section: ■ Discussionsupporting

confidence: 82%