Abstract Detail

Recent Topics Posters

Rutschmann, Frank [1], Eriksson, Torsten [2], Conti, Elena [1].

Molecular dating applied to biogeography: Did Crypteroniaceae really disperse out-of-India?.

Biogeographical and paleontological studies suggested that some ancient Gondwanan taxa have been carried by the drafting Indian plate from Gondwana to Asia. During this journey, the Indian island experienced dramatic latitudinal and climatic changes that caused massive extinctions in its biota. However, some taxa survived these circumstances and dispersed “out-of-India” into South and Southeast Asia, after India collided with the Asian continent in the Early Tertiary. Here we present molecular evidence to test the validity of the out-of-India hypothesis for the South East Asian Crypteroniaceae (Myrtales). Clock-independent age estimates (NPRS, Penalized Likelihood, and Bayesian dating), based on maximum likelihood and Bayesian analyses of three chloroplast and two nuclear DNA regions were used to infer the age of Crypteroniaceae. We also explored the critical assignment of several fossil and geological constraints to calibrate the trees and analysed the influence of different data partitions on the estimated ages.

1 - University of Zurich, Institute of Systematic Botany, Zollikerstrasse 107, Zurich, CH-8008, Switzerland
2 - Bergius Foundation, Royal Swedish Academy of Sciences, Box 50017, Stockholm, SE-10405, Sweden

Keywords:
molecular dating
Crypteroniaceae
out-of-India
biogeography
Gondwana
bayesian dating
myrtales.

Presentation Type: Poster
Session: 32-149
Location: Special Event Center (Cliff Lodge)
Date: Tuesday, August 3rd, 2004
Time: 12:30 PM
Abstract ID:1007