Global classes invited by professors from overseas prestigious universities have been held since this year to provide high-quality classes created by teachers from overseas prestigious universities to students to improve the level of education and establish a global learning platform.

1. Lecturer: Prof. Jeff Doyle

 - Cornell University, School of Integrative Plant Science professor
 - A world-renowned researcher and professor in the field of plant taxonomy and molecular phylogeny, he shows a lot of interest, effort, and passion in the education of undergraduate/graduate students
 - Researching the mechanism of speciation through polyploidization of Fabaceae, and research om molecular evolution, contributing a lot to plant evolution and phylogenetic research

2. Contents:
 - Polyploidy in plant evolution (Nov. 10, Thursday)
The lecture will define polyploidy as whole genome multiplication, either within an individual (e.g., endopolyploidy) or at the level of whole organisms, focusing on the latter as a common occurrence in the history of plant lineages and discussing the different ways in which polyploidy can occur. Polyploidy is a source of evolutionary novelty, through both genome doubling itself (in all polyploids) or by bringing together divergent genomes in allopolyploids, which are often considered “fixed hybrids”. How genome doubling can produce novelty is less well understood, as will be discussed. Examples of polyploidy will be drawn from the legume family, particularly the wild perennial relatives of soybean.

 - Gene trees and species trees (Nov. 17, Thursday)
In the phylogenetics era phylogenies of species and higher taxa (“species trees”) were inferred directly from trees reconstructed from one or a few DNA sequences (“gene trees”). However, gene trees do not necessarily track the species tree due to a variety of technical and biological reasons, making it essential to distinguish between these two types of trees. Deep coalescence of alleles leading to incomplete lineage sorting is an expectation of the neutral model of molecular evolution and leads to incongruence among gene trees and between gene and species trees. Coalescent methods were developed to infer the underlying species tree that shapes the evolution of all genes in a set of species, and have become an important approach in the phylogenomics era. Introgression (hybridization followed by backcrossing) and horizontal gene transfer also can produce incongruence over and above that expected from incomplete lineage sorting. Plants often have large gene families produced from gene duplications; incongruence between gene and species trees can also occur due to conflation of orthologous and paralogous genes.

3. Host: Department of Biological Sciences (Prof. Seung Chul Kim's Plant Systematics Course)

4. Date and Time
- Nov. 10 (Thur) & Nov. 17 (Thur), 10:00 A.M. ~ 12:00 P.M.
- Venue: Virtual Studio Classroom (Engineering Building 2 #27111)

5. WebEx/Zoom Link
  1) Special Lecture I by Prof. Jeff Doyle (Cornell University, USA) 
  ⦁ Meeting ID: 653 097 0930
  ⦁ PW: 435013
  ⦁ Link:  https://us02web.zoom.us/j/6530970930?pwd=NTZCZ2FRSGxaNlorank0N0Zla2RvUT09

  2) Special Lecture II by Prof. Jeff Doyle (Cornell University, USA)  
  ⦁ Meeting ID: 653 097 0930
  ⦁ PW: 435013
  ⦁ Link:  https://us02web.zoom.us/j/6530970930?pwd=NTZCZ2FRSGxaNlorank0N0Zla2RvUT09

6. Inquiries: Department of Biological Sciences (031-290-5803)