Maximum Likelihood Method on The Construction of Phylogenetic Tree for Ident...

杨利霞

Maximum Likelihood Method on The Construction of

Phylogenetic Tree for Identification the Spreading of

0 j2 S5 X, [3 I% q! x* R

SARS Epidemic

There are several phylogenetic tree construction
methods that can be used to illustrate the spread of disease
( Z$ w% d8 }+ f# x6 T  eepidemics. One of the methods used is probability-based
maximum likelihood. This paper explains how to identify the
" w/ Z8 l. h. A/ L: _+ B5 Zspread of the SARS epidemic in the world using the formation of
phylogenetic trees using the maximum likelihood method. The
& ~3 ]2 o( A) B4 X$ X# V( ioutput obtained was a description of the spread of SARS virus
" K9 G0 v0 c; X! h" w8 qwith the selection of tree candidates after performing a heuristic
search of the Stepwise Addition method. The result of the research
1 O6 M8 ?2 O- Q' _# Lshowed that the closest distance to the palm civet is GZ 02/18/03
+ ]  v. u9 g: N+ I2 Tindicating that the initial spread of the SARS epidemic started
# Q* u+ s3 r6 y# E+ P/ b# k9 Y% ^from Guangzhou.