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Genetic structure of a hybrid zone between two violets, V iola rossii H emsl. and V . bissetii M axim.: dominance of F 1 individuals in a narrow contact range
Author(s) -
Nagano Yusuke,
Hirao Akira S.,
Itino Takao
Publication year - 2015
Publication title -
plant species biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.419
H-Index - 36
eISSN - 1442-1984
pISSN - 0913-557X
DOI - 10.1111/1442-1984.12054
Subject(s) - hybrid zone , biology , hybrid , ecotone , violaceae , dominance (genetics) , evolutionary biology , botany , ecology , gene flow , habitat , genetic variation , genetics , gene
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, V iola bissetii H emsl. and V iola rossii M axim. Our aim was to clarify the formation and maintenance of hybrids between these V iola species. We found that most hybrid individuals ( V. bissetii × V. rossii ) were of the F 1 generation, with a few of the F 2 generation. We found no backcrosses. The scarcity of post‐ F 1 hybrids indicates that a species barrier is established between the parental species. The F 1 ‐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.