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[2019 Spring Life Sciences & IBB Seminar]
▶Subject: Sequencing the pepper genomes: What we learn?
▶Speaker: Prof. Doil Choi (Plant Immunity Research Center (SRC), Department of Plant Sciences, College of Agriculture and Life Sciences, Seoul National University)
▶Date: 5:10PM/Apr. 12(Fri.)/2019
▶Place: Auditorium(1F), Postech Biotech Center
Transposable elements (TEs) provide major evolutionary forces leading to new genome structure and species diversification. However, the role of TEs in the expansion of disease resistance gene families has been unexplored in plants. Here, we report two high-quality de novo genomes (Capsicum baccatum and C. chinense) and an improved reference genome (C. annuum) for peppers. Dynamic genome rearrangements involving translocations among chromosomes 3, 5 and 9 were detected in comparison between C. baccatum and the two other peppers. The amplification of athila LTR-retrotransposons, members of the gypsy superfamily, led to genome expansion in C. baccatum. In-depth genome-wide comparison of genes and repeats unveiled that the copy numbers of NLRs were greatly increased by LTR-retrotransposon-mediated retroduplication. Moreover, retroduplicated NLRs exhibited great abundance across the angiosperms; most cases are lineage-specific and therefore recent. Our study revealed that retroduplication has played key roles in the emergence of functional disease-resistance genes in plants.
▶Inquiry: Prof. Il-Doo Hwang (279-2291)
* This seminar will be given in English.
Please refrain from taking photos during seminars. *