Molecular Phylogenetics of Poaceae: An Expanded Analysis ofrbcL Sequence Data

✍ Scribed by Melvin R. Duvall; Brian R. Morton

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 112 KB
• Volume: 5
• Category: Article
• ISSN: 1055-7903
• DOI: 10.1006/mpev.1996.0030

✦ Synopsis

Studies lated dicot were variously employed as outgroups and of various plastid gene sequences are also under way, analyzed with 23 species of Poaceae using the parsiincluding those for ndhF among Bambusoideae and almony method. Measures of support were determined. lied species (Clark et al., 1995); rpoC2 and rbcL in Arun-The terminal portion of the tree was invariant in all dinoideae (Barker et al., 1994; and work in progress); analyses. Outgroup selection affected the basal topoland the ITS region of nuclear ribosomal DNA in ogy of the tree with somewhat different measures of Pooideae (Hsiao et al., 1994). Molecular studies sketchsupport for the deeper branches of the tree. When the ing phylogenetic trends across the entire Poaceae inoutgroup was the dicot, pooid grasses made up the clude the nuclear rRNA sequencing study of Hamby basal clade. When the outgroup was Joinvilleaceae or and Zimmer (1988), the restriction sites analysis of Restionaceae, species of Bambusoideae were basal- Davis and Soreng (1993), the rps4 work of Nadot et al.

most. Increased sampling did not result in a marked (1994), and the rbcL study of Doebley et al. (1990). increase in support of the rbcL data for the earliest The inquiry of Doebley et al. (1990) was a groundbranching events.