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SUPPORT FOR AN EXPANDED SOLMS-LAUBACHIA (BRASSICACEAE): EVIDENCE FROM SEQUENCES OF CHLOROPLAST AND NUCLEAR GENES 1, 2

2006; Missouri Botanical Garden; Volume: 93; Issue: 3 Linguagem: Inglês

10.3417/0026-6493(2007)93[402

2162-4372

Jipei Yue, Hang Sun, Ihsan A. Al‐Shehbaz, Jianhua Li,

Sesquiterpenes and Asteraceae Studies

Sequences of the plastid maturase (matK) and nuclear chalcone synthase (Chs) were analyzed separately and in combination to assess phylogenetic relationships of Solms-laubachia Muschl. (all nine known species and two undescribed ones) to the genera Baimashania Al-Shehbaz, Parrya R. Br., Desideria Pamp., Leiospora (C. A. Mey.) Dvořák, Christolea Cambess., and Phaeonychium O. E. Schulz (Brassicaceae). Baimashania is clustered with Aubrieta deltoidea (L.) DC. and Arabis blepharophylla Hook. & Arn. Solms-laubachia, Desideria, Leiospora, Christolea, and Phaeonychium are more closely related to Matthiola R. Br. than to Parrya, and they form a well-supported clade. Within this clade, Leiospora is sister to a subclade containing the sister groups Christolea and Solms-laubachia s.l. The Solms-laubachia s.l. group contains Solms-laubachia, Desideria, and a species of Phaeonychium. Neither Solms-laubachia nor Desideria is monophyletic, whereas Phaeonychium jafrii Al-Shehbaz is embedded within the group. Therefore, our results suggest that Solms-laubachia be expanded to include Desideria and P. jafrii. Nevertheless, more species of Desideria, Parrya, and Phaeonychium are needed to further test our findings.