Matuszak et al. 2015 (Conference Paper) Ananas

Ananas (Bromelioideae, Bromeliaceae) ? Phylogenetic relationships based on nuclear, plastid and AFLP data

Author(s):—S. Matuszak, J. Paule, S. Heller, E. Leme, G. Steinbeisser & G. Zizka in Benko-Iseppon, A.M.; Alves, M. & Louzada, R. (2015) An overview and abstracts of the First World Congress on Bromeliaceae Evolution. Rodriguésia 66(2): A1-A66.

Publication:— (2015).

Abstract:—Ananas Mill. is native to South America and well known due to the cultivated pineapple Ananas comosus (L.)Merr. (Leme and Siqueira Filho 2007). Since description of the genus in 1754, the taxonomy of Ananas has varied substantially (Coppens d?Eeckenbrugge and Leal 2003). The latest classification of Smith and Downs (1979), corrected by Leal (1990), recognized seven Ananas species and accepted Pseudananas sagenarius(Arruda) Camargo as a monotypic distinct genus. This concept has been brought into doubt based on morphological, biochemical and molecular diversity data as well as reproductive behaviour (Coppens d?Eeckenbrugge and Leal 2003). Therefore, Leal et al. (1998) suggested a simplification by merging the seven species of Ananas into a single species with Pseudananas sagenarius classified as a second species of Ananas. In the latest study concerning the taxonomy of Ananas, phylogenetic relationships have been inferred by examining Chloroplast DNA diversity using PCR-RFLP data (Duval et al. 2003). There are two ways of interpreting of the results of Duval et al. (2003): (1) follow the biological concept and lump the Ananas species as suggestedby Leal et al. (1998), or (2) consider monophyly as an essential criterion for classification and maintain the seven species because of observed paraphyly. We present a fully resolved phylogenetic tree comprising all seven Ananas species and also Pseudananas sagenarius based on three nuclear markers (agt1, ETS, phyC), five plastid markers (atpB-rbcL, trnL-trnF, matK, ycf1 (part 1 and 6)) and AFLP data. Genetic distances in theAnanas clade are low, which can be interpreted in favour of the classification of Coppens d?Eckenbrugge and Leal (2003). However, we follow Leme and Siqueira Filho (2007) by maintaining the species level, because (1) genetic distances in all Bromelioideae are comparatively low and gene flow seems to be possible even
between genera, and (2) a thorough morphological study of the Ananas taxa is lacking.

Keywords:—Ananas; Phylogeny; Species Level.