Allopolyploid speciation and ongoing backcrossing between diploid progenitor and tetraploid progeny lineages in the Achillea millefolium species complex: analyses of single-copy nuclear genes and genomic AFLP

Abstract Background In the flowering plants, many polyploid species complexes Audio Tube display evolutionary radiation.This could be facilitated by gene flow between otherwise separate evolutionary lineages in contact zones.Achillea collina is a widespread tetraploid species within the Achillea millefolium polyploid complex (Asteraceae-Anthemideae

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Passenger Ticket Pricing Strategy and Clearing System Design for Rail Transit with Multiple Operating Entities and Multiple System Modes in Metropolitan Area

Objective Metropolitan area rail transit lines with different operating entities and different system modes differ in passenger capacity division and operating cost verification, and there is a need for differentiated pricing.In order to promote the integration of four networks (mainline railways, intercity railways, suburban railways, Fireplaces a

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Bonsai in the time of COVID

The study ORG NO SALT VEGETABLE BOUILLON CUBES sought to find out to what extent engagement with serious leisure, in this case, bonsai growing, can help people deal with challenging times, such as a global pandemic.In particular, how bonsai enthusiasts use their hobbies to manage uncertainty and stress during the lockdown and how they have shared t

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The regional pollutant budget of the atmospheric boundary layer: Concept, interpretations and observational results

Regional budgets of pollutants in the atmospheric boundary layer (ABL) provide valuable information on transport and chemical processes, especially over complex terrain where local assessments are not representative.Horizontal transport, vertical transport (advective and non-advective), deposition, emissions and chemical production/destruction cons

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