Genomic variability as a driver of plant-pathogen coevolution

 · Evolutionary genomics has recently entered a new era in the study of host-pathogen interactions. A variety of novel genomic techniques has transformed the identification, detection and classification of both hosts and pathogens, allowing a greater resolution that helps decipher their underlying dynamics and provides novel insights into their environmental context. Here we review recent literature on the evolutionary and molecular processes that shape this variation, focusing primarily on gene-for-gene interactions. In summarizing theoretical and empirical studies of the processes that shape this variation in natural plant and pathogen populations, we find a disconnect between the complexity of ecological interactions involving Cited by: It has been proposed that many pathogenic microbes have evolved a 'two-speed' genome with regions that show increased variability and that are enriched in transposable elements and pathogenicity-related genes. Plants similarly display structured genomes with transposable-element-rich regions that mediate accelerated www.doorway.ru by:

Nonetheless, in an analogous study of wild flax plants, there was less genetic variation in susceptibility to sympatric (coevolved) fungal pathogens [Antonovics et al., ].” “Regardless of its causes, it may be common that susceptibility to infectious disease has a simple genetic basis. Both plant R-genes and pathogen effectors are located in genomic regions that undergo exceptional rates of mutagenesis. As a result, de novo diversity is generated quickly, providing material to allow rapid adaptation on the part of each species, but simultaneously creating variability that is maladaptive or neutral. Perhaps more critically, in both plant and animal systems, direct investigation of causal links between population genetic structure and disease dynamics has received scant attention, although studies involving agricultural pathogens provide insight into how disease pressure and host diversity may interact to determine rates of pathogen evolution (10, 11). The lack of empirical evidence is surprising, given the potential for genetic variation to affect not only disease dynamics and.

17 មិថុនា DISSERTATION RESEARCH: Experimental investigation of the genomic basis of Genomic variability as a driver of plant-pathogen coevolution? This study is the first to characterize the pathogen genes involved in coevolutionary Genomic variability as a driver of plant-pathogen coevolution? levels of genetic variation for pathogen infectivity (Tack et al. ) distribution in plant genomes is driving major leaps in un-.