Genetic structure of a hybrid zone between two violets, Viola rossii Hemsl. and V. bissetii Maxim.: dominance of F1 individuals in a narrow contact range. Issue 3 (24th June 2014)

• Record Type: Journal Article
• Authors: Nagano, Yusuke; Hirao, Akira S.; Itino, Takao
• Is Part Of: Plant species biology. Volume 30:Issue 3(2015:Jul.)
• Page Start: 237
• Page End: 243
• Publication Date: 2014-06-24
• Subjects: Plants -- Evolution -- Periodicals; Plants -- Classification -- Periodicals; 581
• DOI: 10.1111/1442-1984.12054
• Languages: English
• ISSNs: 0913-557X

Abstract

<abstract abstract-type="main"> <title>Abstract</title> <p>The genetic composition of a hybrid zone can provide insight into the evolution of diversification in plants. We carried out morphological and amplified fragment length polymorphism analyses to investigate the genetic composition of a hybrid zone between two violets, <italic>Viola bissetii</italic> Hemsl. and <italic>Viola rossii</italic> Maxim. Our aim was to clarify the formation and maintenance of hybrids between these <italic>Viola</italic> species. We found that most hybrid individuals (<italic>V. bissetii</italic> × <italic>V. rossii</italic>) were of the F₁ generation, with a few of the F₂ generation. We found no backcrosses. The scarcity of post‐F₁ hybrids indicates that a species barrier is established between the parental species. The F₁‐dominated hybrid zone occupied only a narrow, intermediate ecotone between the parental habitats, suggesting that selection by environmental factors against hybrids may help to maintain the current conditions in this hybrid zone.</p> </abstract>