Figure 5 | Scientific Reports

Figure 5

From: Helitron-like transposons contributed to the mating system transition from out-crossing to self-fertilizing in polyploid Brassica napus L.

Figure 5

A proposed model for the origin and formation of B. napus.

In the original B. napus plants, BrS-47 was dominant over BoS-15 in pollen, which may suppress the expression of recessive SP11/SCR gene located on the C genome. As the SP11/SCR and SRK genes located on the A genome can be expressed normally, the original B. napus plants were inferred to be self-incompatible. The genome of the newly formed amphidiploid plants was unstable, with transposable elements playing a pivotal role in providing variation for genome reorganization. A Helitron transposon disrupted cis-regulatory elements responsible for the normal expression of BnSP11-1 and conferred.

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