Interspecific hybrid ancestry of a plant adaptive radiation: allopolyploidy of the Hawaiian silversword alliance (Asteraceae) inferred from floral homeotic gene duplications

Author:

Baldwin, Bruce G., Barrier, Marianne, Purugganan, Michael D., Robichaux, Robert H.

Title:

Interspecific hybrid ancestry of a plant adaptive radiation: allopolyploidy of the Hawaiian silversword alliance (Asteraceae) inferred from floral homeotic gene duplications

Periodical:

Molecular Biology and Evolution

Year:

1999

Volume:

16

Pages:

1105-1113

Subject:

Adaptive radiation (Evolution) Argyroxiphium sandwicense Silverswords

Summary:

The Hawaiian silversword alliance is an excellent example of adaptive radiation in plants that is comprised of 30 perennial species in three endemic genera -- the Argyroxiphium, Dubautia, and Wilkesia, that are distributed on six of the eight main Hawaiian Islands. The islands on which these plants may be found are Hawaii, Maui, Molokai, Lanai, Oahu, and Kauai where isolation, continued island formation, and a high diversity of environmental settings promote species radiations in both plant and animal groups. Since studies have proven the hypothesis that the closest relatives of the Hawaiian silversword alliance can be found among the North American tarweeds, understanding the origin of species-rich insular groups is a crucial step toward reconstructing evolutionary patterns of ecological and morphological change that characterize adaptive radiations. Hence, the purpose of this report.

Label:

Silverswords

URL:

https://doi.org/10.1093/oxfordjournals.molbev.a026200

Date:

August 1999

Collection:

Periodicals