Document Type
Article
Publication Date
2016
College/Unit
Davis College of Agriculture, Natural Resources and Design
Department/Program/Center
Division of Plant and Soil Sciences
Abstract
The allotetraploid species Brassica napus L. is a global crop of major economic importance, providing canola oil (seed) and vegetables for human consumption and fodder and meal for livestock feed. Characterizing the genetic diversity present in the extant germplasm pool of B. napus is fundamental to better conserve, manage and utilize the genetic resources of this species. We used sequence-based genotyping to identify and genotype 30,881 SNPs in a diversity panel of 782 B. napus accessions, representing samples of winter and spring growth habits originating from 33 countries across Europe, Asia, and America. We detected strong population structure broadly concordant with growth habit and geography, and identified three major genetic groups: spring (SP), winter Europe (WE), and winter Asia (WA). Subpopulation-specific polymorphism patterns suggest enriched genetic diversity within the WA group and a smaller effective breeding population for the SP group compared to WE. Interestingly, the two subgenomes of B. napus appear to have different geographic origins, with phylogenetic analysis placing WE and WA as basal clades for the other subpopulations in the C and A subgenomes, respectively. Finally, we identified 16 genomic regions where the patterns of diversity differed markedly from the genome-wide average, several of which are suggestive of genomic inversions. The results obtained in this study constitute a valuable resource for worldwide breeding efforts and the genetic dissection and prediction of complex B. napus traits.
Digital Commons Citation
Gazave, Elodie; Tassone, Erica E.; Ilut, Daniel C.; Wingerson, Megan; Datema, Erwin; Witsenboer, Hanneke M. A.; Davis, James B.; Grant, David; Dyer, John M.; Jenks, Matthew A.; Brown, Jack; and Gore, Michael A., "Population Genomic Analysis Reveals Differential Evolutionary Histories And Patterns Of Diversity Across Subgenomes And Subpopulations Of Brassica napus L." (2016). Faculty & Staff Scholarship. 2235.
https://researchrepository.wvu.edu/faculty_publications/2235
Source Citation
Gazave, E., Tassone, E. E., Ilut, D. C., Wingerson, M., Datema, E., Witsenboer, H. M. A., Davis, J. B., Grant, D., Dyer, J. M., Jenks, M. A., Brown, J., & Gore, M. A. (2016). Population Genomic Analysis Reveals Differential Evolutionary Histories and Patterns of Diversity across Subgenomes and Subpopulations of Brassica napus L. Frontiers in Plant Science, 7. https://doi.org/10.3389/fpls.2016.00525
Comments
© 2016 Gazave, Tassone, Ilut, Wingerson, Datema, Witsenboer, Davis, Grant, Dyer, Jenks, Brown and Gore. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.