Plant Breeding and Biotechnology

Indexed in /covered by CAS, KoreaScience & DOI/Crossref:eISSN 2287-9366   pISSN 2287-9358

Table. 1.

Table. 1.

Case study of intra and inter-specific gene flow and adaptive evolution in plants (Liu and Huang 2009).

Variety Research direction Gene flow dynamics and diversity patterns The mechanism of gene flow promoting adaptive evolution References
Myricaria laxiflora (Franch.) P. Y. Zhang et al. Y. J. Zhang Intraspecies Unidirectional linear migration and higher genetic differentiation among populations Under the condition of unidirectional linear gene flow, the changeable ecological environment of canyons and rivers promotes the continuous establishment and genetic diversification of new populations downstream Liu et al. 2006; Wang Yong et al.
Carex curvula All. Between subspecies within the species Common origin and free mating, but adapt to different ecological environments Niche theory: Introgressive hybridization promotes newly formed individuals or populations to adapt to marginal habitats Choler et al. 2004
Eucalyptus globulus Labill Intraspecies The three dwarf-growing populations and their neighboring high-growing individuals formed genetic differentiation, and they had their own independent origins. Eucalyptus marginal small populations establish genetic differentiation with neighboring large populations through ecological speciation Foster et al. 2007
Howea belmoreana (C. Moore & F. Muell.) Becc. and H. forsteriana (C. Moore & F. Muell.) Becc. Intraspecies differentiation to interspecies Habitat, reproduction and molecular data, as well as recent theoretical simulation analysis, show that there is no strict geographical isolation and gene flow blockage in the same region of genetic differentiation and speciation The new island soil types produce new island habitats, and ultimately lead to the original population individuals adapting to the new ecological environment under the effect of selection Savolainen et al. 2006; Gavrilets and Vose 2007
Pinus densata Mast. Intraspecies Morphology, allozyme and cpDNA data reveal that Pinus densata originated from the cross between P. tabuliformis and P. yunnanensis The uplift of the plateau creates new ecological adaptation environments and opportunities for the offspring of heterozygotes Wang et al. 2001; Song et al. 2002
Dubautia ciliolate (DC.) Keck and D. arborea (Gray) Keck Species complex The different gene flows that accompanied the expansion of primitive populations eventually led to the divergence of the two species branches Natural selection based on different habitats, different ecological and climatic factors, etc. may jointly lead to the final genetic differentiation of the species complex Friar et al. 2007; Lawton-Rauh et al. 2007; Remington and Robichaux 2007
Helianthus annuus Linn., H. petiolaris Nutt. And Hybrid seeds of the three of them Intraspecies The offspring of three sunflower hybrids with different morphologies and adapted to different extreme habitats independently originated from the same pair of ancestral parents The ecological environment has played an important role in the ecological adaptation, transformation and adaptive evolution of the offspring of these three different heterozygotes. Gross et al. 2003; Lexer et al. 2003; Rieseberg et al. 2003a; Ludwig et al. 2004
Plant Breed. Biotech. 2021;9:259-71 https://doi.org/10.9787/PBB.2021.9.4.259
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