Table 4 Branch-site model A tests for positive selection in the ancestral lineage of the (D. simulans, D. sechellia, D. mauritiana) clade

From: Comparative analysis of five immunity-related genes reveals different levels of adaptive evolution in the virilis and melanogaster groups of Drosophila

Genes

LRT statistics

Parameter estimates

 

N

ω2=1 vs ω2 >1

No. of sites

(p2+p3) and ω2

spirit a

10

0

—

—

psh a

10

0

—

—

CG7219 b

10

0

—

—

CG9631 b

10

0

—

—

CG12297 a

10

5.248*

0

(p2+p3)=0.008; ω2=848.426

  1. N is the number of species analysed. LRT statistics shows the likelihood ratio test estimates for model A comparisons (with ω2 fixed to 1 and with ω2 >1). In the parameter estimates column it is shown the number of sites identified as under positive selection with a Bayesian posterior probability greater than 95% according to the Bayes empirical Bayes approach and the estimated average value of ω2.
  2. aAnalyses included D. melanogaster, D. simulans, D. sechellia, D. yakuba, D. erecta, D. ananassae, D. pseudoobscura, D. persimilis, D. virilis and D. mojavensis.
  3. bAnalyses included D. melanogaster, D. simulans, D. sechellia, D. mauritiana, D. yakuba, D. erecta, D. orena, D. santomea and D. teissieri.
  4. *Significance with P<0.05.
Back to article page