Natural GMOs Part 204. Many hybrids between species and movements of genes characterised in the rapeseed genetic portfolio

 In plant genealogies genes cross between species many times over time, and also move to new chromosome locations:

Editors comment: The genomic origins of rape oilseed

Many domesticated plants arose through the meeting of multiple genomes through hybridization and genome doubling, known as polyploidy. Chalhoub et al. sequenced the polyploid genome of Brassica napus, which originated from a recent combination of two distinct genomes approximately 7500 years ago and gave rise to the crops of rape oilseed (canola), kale, and rutabaga. B. napus has undergone multiple events affecting differently sized genetic regions where a gene from one progenitor species has been converted to the copy from a second progenitor species. Some of these gene conversion events appear to have been selected by humans as part of the process of domestication and crop improvement.

Early allopolyploid evolution in the post-Neolithic Brassica napus oilseed genome

Chalhoub B et al. Science 22 August 2014: Vol. 345 no. 6199 pp. 950-953 DOI: 10.1126/science.1253435

@ Early allopolyploid evolution in the post-Neolithic Brassica napus oilseed genome: