Rafael Della Coletta

Ph.D. candidate at University of Minnesota

Project

Nonhost resistance in plants - part I

Brief description

During my Master's, I analyzed whole-genome sequencing data to identify regions in the Brachypodium genome associated with resistance to wheat stem rust. After sequencing resistant and susceptible plants and mapping reads back to Brachy's reference genome, I called SNP variants and visualized their frequencies along Brachy's chromosomes. As a result, I could see 7 regions with very distinct patterns of allele frequencies between the two pools of individuals, indicating that such regions may be associated with resistance to wheat stem rust. Finally, I performed Z-tests and determined that 6 of these loci were statistically significant, with 2 of them explaining more than 30% of phenotypic variation.

Software

R, python, UNIX, bowtie2, samtools, bcftools

Manuscript

Genomic dissection of nonhost resistance to wheat stem rust in Brachypodium distachyon (doi: 10.1094/MPMI-08-18-0220-R)

Authors

Della Coletta R, Hirsch CN, Rouse MN, Lorenz A, Garvin DF

Journal

Molecular Plant-Microbe Interactions

(impact factor: 4.171)

Year

2019